As for the system listed below/and above: it will kinda depend upon staging or sound you are wanting. 
What kinda of source unit and battery/power/ground wire are you using?

JL Audio's PowerWedge enclosed subwoofer  CS110RG-W3v3
sealed enclosure with one 10" W3v3 subwoofer
4-ohm total impedance
power handling: 100-300 watts RMS (600 watts peak power)
frequency response: 25-250 Hz
sensitivity: 85 dB

JL Audio A Series A1400
mono subwoofer amplifier
320 watts RMS x 1 at 4 ohms (500 watts RMS x 1 at 2 ohms) at 14.4 volts
240 watts RMS x 1 at 4 ohms (400 watts RMS at 2 ohms) at 12.5 volts
Class-D amplifier design

updated links  Manufacturers linke

[quote name='2000Avenger Sport' post='1014094' date='Nov 5 2006, 11:14 AM']


http://en.wikipedia.org/wiki/Dodge_Avenger

First generation (1995-2000)
Second generation (2008-)
 
2008 Dodge Avenger:

 The Avenger will return for 2008 as a sedan, called the Avenger JS, that would replace the aging Dodge Stratus. The Avenger, along with the redesigned Chrysler Sebring will use a shared DaimlerChrysler/Mitsubishi Motors platform called the GS. For the new cars, the GS platform will be stretched in size and will be known as the JS. The base engine in the ST trim level will be the 2.4 L, naturally-aspirated "World Engine", a joint venture between DaimlerChrysler, Mitsubishi, and Hyundai. Additional engines will include a 2.7 L V6 in the ES and possibly a 3.5 L V6 in the R/T trim level. The new Avenger is expected to be sold worldwide, and will also come to Canada, since the second-generation Dodge Stratus was never sold there. In addition to the 2.4 L "World Engine" and the V6s, export vehicles will be offered with the 2.0 L naturally-aspirated "World Engine", as well as a 2.0 L turbocharged common-rail diesel made by Volkswagen [3].

The Avenger will replace the Charger as Dodge's car in NASCAR in 2007.
Manufacturer:
Mitsubishi Motors (1995-2000)
DaimlerChrysler (2008-)

Production:
1995-2000
2008-

Assembly: Normal, Illinois


Class: Mid-size
Body style:
2-door coupe (1995-2000)
4-door sedan (2008-present)

Engine:
2.0 L 420A I4
2.5 L Mitsubishi 6G72 V6
2.5 L Mitsubishi 6G73 V6

Transmission:
5-speed manual
4-speed 41TE automatic

Wheelbase: 103.70 in.
Length: 190.20 in.
Width: 69.10 in.
Height: 53.00 in.

Related:
Chrysler Sebring coupe
Eagle Talon
Mitsubishi Eclipse
Mitsubishi Galant

The vehicle was officially unveiled at the Paris Auto Show on September 28, 2006 as a concept.
[/quote]

http://www.adireaudio.com/Parthenon/


The Parthenon.  The ultimate loudspeaker driver.  More excursion, more output, higher power handling than any driver on the face of the earth.  A true 82mm one way linear stroke (nearly 6.5 inches peak to peak linear), and a radiating surface greater than three 18" subwoofers allows the Parthenon to generate the highest SPL levels ever achieved by a single driver (more output than eighteen high end 18" drivers)

       The Parthenon Motor (named such for obvious reasons) uses the same dimensions as a Tumult, but this unit works with a dual wound coil to realize over 80mm one way linear stroke. Oh yeah - flux in the gaps is pretty high, at 0.8T - the 3" diameter core (with a SMALL 0.75" diameter pole vent) is completely saturated - that's a LOT of flux in there!
Here's the motor sitting on the bench. It's made from 1008 grade steel, and uses 16 N38 grade neo magnets. The back plate, and both gap plates are flat discs. We use 8 columns to space the lower gap plate up, and 8 columns to space the upper gap plate. Each column is capped with a neo ring - those are the magnets for the system. The lighter colored tops on each column are the neo magnets.       
       Columns are 7/8" diameter. Overall diameter is 8.75", and it's 7.125" tall. Yes, it's deep, but when you consider it has a clean 6.5" of linear stroke, well, you understand where that height comes from! And it's really not that heavy - only 46 pounds for the motor assembly. And yes, it uses our patent pending motor technology, XBL^2.
Another view, but from above. You can see the nice brass screws used to assemble the motor. Gotta use non-magnetic screws, and the brass looks really nice on the steel.       
       View from behind. LOTS of screws holding that thing together! Sixteen total columns, each with a screw at each end. And the pole is held in with 4 more screws - a total of 36 screws. These aren't small screws, either - 1/4"x20 bolts.

So how are we using this? Well, for starters with double-stacked dual voice coils.  Basically four 2 Ohm voice coils in this beast. These motors are semi-stock items. We have parts to build several up in stock, but don't actually build them until they are ordered. Voice coil configurations, diaphragms, suspensions, all those are full custom units, so you can spec out what you ideally want.

At the 2004 CES we showed a 24" square baffle unit, with a Qts of 0.72 and an Fs of 7 Hz. Flat anechoic response to 6 Hz. And capable of over 66 liters of linear air displacement! That generates reference level (121 dB SPL) output at 20 Hz, when sitting naked in a room - no room gain, no baffle, no box required. The first true dipole driver (not sub - no baffle, remember!) that can do reference outputs. With flat output to the single digits. How's that for a driver? Here's a view of the beast from its side, when sitting in its cradle at CES 2004:



That's a 24" square baffle on the front, the suspension is mounted, and the center glide bearing (white) is visible. This thing moves about 2.5" ONE WAY with a simple 9V battery to one of the 4 voice coils. Ever see a driver move like that from a 9V battery? Better yet, ever see a driver move like that period? Check this wicked video out of the Parthenon just pounding away (no baffle, so you can get a better view of how the moving parts work).

Here's a close up of the suspension we used:



Those spirals of coppery material are the spider. It supports 100mm one way linear throw, and provides the compliance we wanted. Note that because they're metal, they are also the tinsel leads, which is why you see the voice coil leads soldered to them. Nice and easy way to attach to the voice coil, and zero chance of lead slap. And they are patent-pending, too...

Yeah, we got kind of extreme. Expect any less from Adire? As for the price, Well, if you gotta ask... Basic charge for the motor is $3000.  Final cost depends upon the application - diaphragm size, voice coil config, any changes required (note that it's trivially easy to add more stroke - lengthen the voice coils, use taller columns, and we're there), finishes (powder coat, anodizations, paint, etc) will all affect the total price; figure in the $5000-$8000 range for most "normal" application. But considering what you have here - more output than 12 Tumults in the base 2004 CES trim! - it's a relative bargain.

So how far can you go? A 48" x 48" panel would be about the limit. Pretty easy to stretch the motor to 12" of peak-to-peak stroke, so that would be around 16 cubic FEET of displacement (over 450 liters of linear displacement). Now THAT would be a monster! Anyone game? We know a few famous car audio names who are already planning to use this beast, want to join that exclusive club?

Hmmm... An IB with one of these units might just be the trick for a new 100 seat theater, too... Anyone out there building a big home theater?

If you are serious about exploring the possibility of using a Parthenon, please contact our engineering team.  To begin the design will require a non-refundable deposit of $1,000.  If you're not serious, don't ask; we won't answer obviously non-serious inquiries.  Note that production takes 8-10 weeks after the design is completed - this is not a project for the faint-of-heart!  But then again, the best always is worth waiting for...

fyi,

Good reccomendations of for both SQ and SPL guys, if you get a chance to go watch/listen to the best SQ and some of the loudest vehicles in the world  heres your chance. 

main SQ competitors to look for advise Gary Biggs, Mark Eldridge, Alama Gates - The Beast II. 
main SPL Competitors, Edge Audio, Ben Sams, Scottie Johnson, Steve Cook, Scott Van Riper, Alan Dante, Gorman Cassidy 

dB Drag World Finals - Kentucky Intl Con. Center, Kentucky
October 14 - 15, 2006 Louisville, KY
http://www.termpro.com/dbdrag/events/finals06/schedule.html

USACi World Finals Bartle Hall
November 18 - 19, 2006, Kansas City, MO
http://www.soundoff.org/unified_finals/

Meca World Finals, Marion County Fairgrounds 
November 11 - 12 Shepherdsville, KY
http://www.mecacaraudio.com/events/indexnew.php

IASCA World Finals -Hampton  GA USA
September 16 - 17 2006
http://www.iasca.com/events/

sq speakers/componets

a/d/s/ www.directed.com
245ix ............ $350 ............ 5.25"
246ix ............ $400 ............ 6.5"
345cs ............ $650 ............ 5.25"
346cs ............ $700 ............ 6.5"

Arc Audio www.arcaudio.com
ACS230 ............ $419 ............ 5.25"
ACS265 ............ $449 ............ 6.5"
KAR230 ............ $159 ............ 5.25"
KAR265 ............ $179 ............ 6.5"

Alpine Electronics www.alpine-usa.com
SPX-Z18T ............ $3500 ............ 7
SPX-Z15M ............ $1500 ............ 6
SPX-177R ............ $450 ............ 6.5"
SPX-137R ............ $440 ............ 5.25"
SPX-107R ............ $430 ............ 4"
SPX-17MB ............ $330 ............ 6.5
SPR-17LS ............ $280 ............ 6.5"
SPR-57LS ............ $280 ............ 5.25"
SPS-571A ............ $220 ............ 5.25"
SPS-171A ............ $220 ............ 6.5"

Alumapro www.alumapro.com
ALC 4.2 ............ $460 ............ 4"
ALC 5.2 ............ $480 ............ 5"
ALC 5.2D ............ $660 ............ 5"
ALC 6.2 ............ $500 ............ 6"
ALC 6.2D ............ $700 ............ 6"
ALC4 H20 ............ unk ............ 4"
ALC5 H2O ............ unk ............ 5"
ALC6 H2O ............ unk ............ 6"

AVI Sound www.avisound.com
CLS-100 ............ $349 ............ 4
CLS-130 ............ $399 ............ 5.25
CLS-160 ............ $409 ............ 6.5
CMS-100 ............ $349 ............ 4
CMS-130 ............ $399 ............ 5.25
CMS-160 ............ $409 ............ 6.5
DIRECT(BSM) ............ $829 ............ 6.5
DIRECT(EL) ............ $279 ............ 6.5"
DIRECT(FRM) ............ $570 ............ 6.5"
DIRECT(LX) ............ $479 ............ 6.5"
DIRECT(MX) ............ $448 ............ 6.5"
DIRECT(XL) ............ $199 ............ 6.5"
EXPRESS(BSM) ............ $798 ............ 5.25
EXPRESS (EL) ............ $269 ............ 5.25"
EXPRESS(FRM) ............ $549 ............ 5.25"
EXPRESS(LX) ............ $459 ............ 5.25"
EXPRESS(MX) ............ $429 ............ 5.25"
EXPRESS(XL) ............ $189 ............ 5.25"
TRI-STAR ............ $699 ............ 6.5"
TRI-STAR(BSM) ............ $1141 ............ 6.5"
Ultimate(LX) ............ $399 ............ 4"
Ultimate(MX) ............ $399 ............ 4"

Boston Acoustics, Inc. www.bostonacoustics.com
Z6 ............ $1000 ............ 6.5"
Z5 ............ $1000 ............ 5.25"
Pro60 ............ $600 ............ 6.5"
Pro50 ............ $600 ............ 5.25"
SL 80 ............ $300 ............ 6.5"
SL60 ............ $350 ............ 6.5"
SL65 ............ $250 ............ 6.5"
SX65 ............ $250 ............ 6.5"
SX55 ............ $250 ............ 5.25"
S60 ............ $200 ............ 6.5"
S50 ............ $200 ............ 5.25"

Brax www.theautophile.com
Graphic 6 ............ $1320 ............ 6.5"
Graphic Pro ............ $2500 ............ 6.5"

Canton Electronics Corp. www.cantonusa.com
QS 2.13 ............ $379 ............ 5"
QS 2.16 ............ $429 ............ 6.5"
QS 3.28 ............ $799 ............ 10"
RS 2.13 ............ $249 ............ 5"
RS 2.16 ............ $299 ............ 6.5"
RS 10 CX ............ $199 ............ 4"
RS 13 CX ............ $229 ............ 5"
RS 16 CX ............ $249 ............ 6.5"
RS 69 TX ............ $279 ............ 8.31"
CS 200 A ............ $600 ............ 7.9

CDT Audio www.cdtaudio.com
CL 41 ............ $279 ............ 4
CL 51 ............ $289 ............ 5.06
CL 5XB ............ $299 ............ 5.06
CL 61 ............ $299 ............ 6.5
CL 641 ............ $399 ............ 6.5
ES-420 ............ $739 ............ 4.87
ES-520 ............ $749 ............ 5.5
ES-620 ............ $759 ............ 6.68
HD-52 ............ $409 ............ 5.5
HD-42 ............ $399 ............ 4.87
HD-62 ............ $419 ............ 6.68

Clarion www.clarion.com
SRS1685 ............ $200 ............ 6.5"
SRS1625 ............ $150 ............ 6.5"
CM1635 ............ $280 ............ 6.5"
CMCS7.1 ............ $300 ............ 7"

Crossfire, Inc. www.crossfirecaraudio.com
SX 5.0 ............ $129 ............ 5.25"
SX 6.0 ............ $149 ............ 6"
P1c4 ............ $209 ............ 4"
SR 5 ............ $239 ............ 5.25"
SR 6 ............ $259 ............ 6.5"
X5 ............ $399 ............ 5.25"
X6 ............ $449 ............ 6.25"

Crystal Mobilesound www.crystalmobilesound.com
CPE 40 ............ $130 ............ 4"
CPE 50 ............ $130 ............ 5.25"
CPE 60 ............ $170 ............ 6.5"
CSC 40 ............ $150 ............ 4"
CSC 50 ............ $180 ............ 5.25"
CSC 60 ............ $200 ............ 6.5"
SSW 5.25 ............ $100 ............ 5.25"
SSW 6.50 ............ $130 ............ 6.5"
SSCS 5 ............ $180 ............ 5.25"
SSCS 6 ............ $200 ............ 6.5"

Diamond Audio Technology, Inc. www.diamondaudio.com
D971 ............ $1400 ............ 7
S400a ............ $550 ............ 4.5"
S400s ............ $550 ............ 4.5"
S500a ............ $560 ............ 5.25"
S500s ............ $560 ............ 5.25"
S600a ............ $600 ............ 6"
S600s ............ $600 ............ 6"
S6.0mx3 ............ $450 ............ 6"
D641a ............ $350 ............ 4.5"
D641s ............ $350 ............ 4.5"
D651a ............ $380 ............ 5.25"
D651s ............ $380 ............ 5.25"
D661a ............ $410 ............ 6.5"
D661s ............ $410 ............ 6.5"
D66.1x3 ............ $280 ............ 6.5"
D341 ............ $260 ............ 4.5"
D351 ............ $290 ............ 4.5"
D361 ............ $320 ............ 6"

DLS America, Inc. www.dls-america.com www.dls.se
PS6 ............ $225
MS6 ............ $335
UP36 ............ $675
UR36 ............ $875
8.3 ............ $995

Dynaudio North America www.dynaudiousa.com
System 220 MKII ............ $730 ............ 5.75
System 240 MKII ............ $800 ............ 7
System 260 ............ $800 ............ 8
System 340 ............ $1200 ............ 7
System 360 ............ $1260 ............ 8
MW150 ............ $190 ............ 5.75
MW160 ............ $200 ............ 7
MW170 ............ $220 ............ 8
System 240 GT ............ $800 ............ 7
System 240 ESOTAR ............ $1450 ............ 7
MD330 ESOTAR ............ $480
MW160GT ............ $200

FOCAL America www.focal-america.com
130 A ............ $349 ............ 5.25
165 A ............ $349 ............ 6.5
100 V2 ............ $399 ............ 4
130 V2 ............ $449 ............ 5.25
165 V2 ............ $449 ............ 6.5
165 V SLIM ............ $529 ............ 6.5
165 V3E ............ $729 ............ 6.5
270 V3 ............ $899 ............ 11
136 W ............ $949 ............ 5.37
165 W ............ $1099 ............ 6.5
165 W3 ............ $1249 ............ 6.5
180 W ............ $1649 ............ 7
AUDIOM 6W ............ $299 ............ 6.5
AUDIOM TLR ............ $899 ............ 4
100 KP ............ $699 ............ 4
130 KP ............ $799 ............ 5.25
165 KP ............ $799 ............ 6.5
165 K2P ............ $949 ............ 6.5
165 K3P ............ $1599 ............ 6.5
165 KF ............ $599 ............ 6.5
Kit 5 ............ $3900 ............ 5.25
Kit 6 ............ $4100 ............ 6.5
Kit 7 ............ $4900 ............ 6.5
Kit 5 Active ............ $2200 ............ 5.25
Kit 6 Active ............ $2400 ............ 6.5
Kit 7 Active ............ $2900 ............ 6.5

Genesis ICE www.theautophile.com
Profile 13 ............ $399 ............ 5.25"
Profile 16 ............ $399 ............ 6.5"
Audiophile 13 ............ $549 ............ 5.25"
Audiophile 16 ............ $549 ............ 6.5"
Absolute 1.2 ............ $2999 ............ 6.5"
Absolute 1.3 ............ $4999 ............ 6.5"
Absolute 2.2 ............ $4999 ............ 6.5"
Absolute 2.3 ............ $6999 ............ 6.5"

Helix Electronics www.theautophile.com
HXS135 MkII ............ $200 ............ 5.25
HXS136 MkII ............ $240 ............ 6.5
HXS234 ............ $300 ............ 4"
HXS235 ............ $310 ............ 5.25"
HXS236 ............ $320 ............ 6.5"
HXS635 ............ $450V6.5"
HXS636 ............ $480
S5 Comp ............ $600
S6 Comp ............ $650
Blue 52 ............ $120
Blue 62 ............ $140

MB Quart Electronics USA, Inc. www.mbquart.com
DSE213 ............ $229 ............ 5.12"
DSE216 ............ $249 ............ 6.5"
RCE210 ............ $299 ............ 4"
RCE213 ............ $299 ............ 5.12"
RCE216 ............ $339 ............ 6.5"
RCE164 ............ $279 ............ 6.5"
PCE210 ............ $529 ............ 4"
PCE213 ............ $529 ............ 5.12"
PCE216 ............ $579 ............ 6.5"
PCE164 ............ $279 ............ 6.5"
QSD210 ............ $1399 ............ 4"
QSD213 ............ $1399 ............ 5.12"
QSD216 ............ $1499 ............ 6.5"
QSD164 ............ $699 ............ 6.5"
RWE100 ............ $199 ............ 4"
RWE130 ............ $199 ............ 5.12"
RWE160 ............ $229 ............ 6.5"
PWE100 ............ $219 ............ 4"
PWE130 ............ $219 ............ 5.12"
PWE160 ............ $269 ............ 6.5"
QWD100 ............ $279 ............ 4 "
QWD130 ............ $279 ............ 5.12"
QWD160 ............ $329 ............ 6.5"

McIntosh Laboratory Inc. www.mcintoshlabs.com
MSS630 ............ $600 ............ 6.5"

MMATS Professional Audio www.mmatsproaudio.com
MMATS Pro4 ............ $239 ............ 4"
MMATS Pro5 ............ $259 ............ 5"
MMATS Pro6.5 ............ $279 ............ 6.5"

Morel www.morelamerica.com
Elate 9 3way ............ $1600 ............ 9
Elate 6 3way ............ $1500 ............ 6.5
Elate 5 3way ............ $1450 ............ 5.25
Elate 9 2way ............ $1300 ............ 9
Elate 6 2way ............ $1200 ............ 6.5
Elate 5 2way ............ $1150 ............ 5.25
Hybrid Ovation 6 ............ $900 ............ 6.5
Hybrid Ovation 5 ............ $880 ............ 5.25
Hybrid Ovation 4 ............ $850 ............ 4
Dotech MkII 6 ............ $500 ............ 6.5
Dotech MkII 5 ............ $470 ............ 5.25
Dotech MkII 4 ............ $450 ............ 4
Pulse 6 ............ $300 ............ 6.5"
Pulse 5 ............ $270 ............ 5.31"
Elate SW 10 ............ $400 ............ 10.34
Elate SW 9 ............ $350 ............ 8.75
Elate SW 6 ............ $650 ............ 6.5
Elate SW 5 ............ $550 ............ 5.25
Hybrid Ovation 6W ............ $550 ............ 6.5
Hybrid Ovation 5W ............ $530 ............ 5.25
Hybrid Ovation 4W ............ $450 ............ 4
Dotech MkII 6W ............ $330 ............ 6.5
Dotech MkII 5W ............ $320 ............ 5.25
Dotech MkII 4W ............ $300 ............ 4
Supremo ............ $550

Morel Acoustics USA, Inc. www.morelusa.com
CR-101se ............ $169 ............ 4
CR-103 ............ $169 ............ 2.5
Triumph! ............ $359 ............ 4.3
MR-56 ............ $265 ............ 4.75
WR-4 ............ $318 ............ 4
WR-5 ............ $318 ............ 5.25
WR-6 ............ $398 ............ 6.5
WR-8 ............ $418 ............ 8.75
SR-4.2 ............ $568 ............ 4
SR-5.2 ............ $568 ............ 5.25
SR-6.2 ............ $648 ............ 6.5
SR-8.2 ............ $658 ............ 8.75
SR-6.3 ............ $898 ............ 6.5
SR-6.3 (WR-4) ............ $898 ............ 6.5
SR-8.3 ............ $918 ............ 8.75
SR-8.3 (WR-4) ............ $918 ............ 8.75

Oz Audio www.jti-innovation.com
180CS ............ $649 ............ 6.5"
130CS ............ $619 ............ 5.25"
V650S3 ............ $199 ............ 6.5"
V525S3 ............ $185 ............ 5.25"

Phoenix Gold Int. Inc. www.phoenixgold.com
Octane R 6.5 Comp ............ $120 ............ 6.5
Octane R 6.0 Comp ............ $130 ............ 6 0
Octane R 5.0 Comp ............ $130 ............ 5.25
Octane ZR6.5 Comp ............ unk ............ 6.5"
Octane ZR6.0 Comp ............ ............ 6"
Octane ZR5.0 Comp ............ unk ............ 5.25"
Xenon X6.5 ............ unk ............ 6.5"
Xenon X5.0 ............ unk ............ 5.25"
Ti 5 Elite ............ $750 ............ 5.25"
Ti 6 Elite ............ $800 ............ 6.5"
Ti 951 Elite ............ $1250 ............ 9"

Polk Audio Inc. www.polkaudio.com
db5250 ............ $210 ............ 5.25"
db6500 ............ $240 ............ 6.5"
db6750 ............ $260 ............ 6.75"
MMC5250 ............ $350 ............ 5.25"
MMC6500 ............ $350 ............ 6.5"

Rainbow Audio Components www.rainbow-audio.de/usa/
CS 260.30 Reference ............ $6579 ............ 6.96
CS 260.30 Reference active ............ $5669 ............ 6.96
CS 360.30 Reference ............ $9900 ............ 6.96
CS 360.30 Reference active ............ $8950 ............ 6.96
CS 275.28 Platinum ............ $3158 ............ 7
CS 275.28 Platinum active ............ $1806 ............ 7
CS 210 P Vanadium ............ $659 ............ 4.5
CS 230 P Vanadium ............ $679 ............ 5.4
CS 265 P Vanadium ............ $719 ............ 6.56
CS 265 P Vanadium Kick ............ $769 ............ 6.56
CS 265 P Vanadium Plug ............ $819 ............ 6.56
CS 365 P Vanadium ............ $929 ............ 6.56
CS 365 P Vanadium Kick ............ $979 ............ 6.56
CS 210 Profi ............ $599 ............ 4.5
CS 230 Profi ............ $619 ............ 5.4
CS 265 Profi ............ $669 ............ 6.56
CS 265 Profi Kick ............ $719 ............ 6.56
CS 265 Profi Phase Plug ............ $769 ............ 6.56
CS 365 Profi ............ $869 ............ 6.56
CS 365 Profi Kick ............ $929 ............ 6.56
CS 275.27 Power ............ $1229 ............ 7
CMX 265 ............ 6.5
CMX 465 Extreme ............ $659 ............ 6.5
SLC 230 ............ $250 ............ 5
SLC 265 ............ $260 ............ 6.5
SLC 365 ............ $359 ............ 6.5
SLC 265 Kick ............ $319 ............ 6.5
SLC 365 Kick ............ $429 ............ 6.5
SLX 230 ............ $180 ............ 5.12
SLX 230 Deluxev ............ $200 ............ 5.12
SLX 265 ............ $190 ............ 6.5
SLX 265 Deluxe ............ $210 ............ 6.5
CS 265 X-Plain ............ $439 ............ 6.5
CS 220 X-Plain ............ $449 ............ 8

USD Audio www.usdaudio.com
USD B-62 ............ $1500 ............ 6.5
USD B-82 ............ $1500 ............ 8
USD D-60 ............ $600 ............ 6.5
USD D-62 ............ $1000 ............ 6.5
USD D-80 ............ $600 ............ 8
USD D-82 ............ $1000 ............ 8
WaveGuide A-800 ............ $2000 ............ 5
WaveGuide D-100 ............ $300 ............ 2
WaveGuide D-200 ............ $500 ............ 4
WaveGuide Super-A ............ $7000 ............ 5.75
WaveGuideBC-300 ............ $1000 ............ 4
WaveGuide A-700 ............ $1500 ............ 4.5
USD Pro-Comps ............ $4500 ............ 7
USD B-Pro Comps ............ $1999 ............ 7"

Audison  www.focal-america.com   
HV Venti Thesis   $8499 Class AB,  20 x 3.3 x 11 
   
HiFonics  www.maxxsonics.com   
XX-Maxximus   $10000  Class D  29.5 x 5.5 x 11.25   
   
Phoenix Gold Int. Inc. www.phoenixgold.com   
MPH-10K   $10000  Class AB

Audiobahn > www.audiobahninc.com   
A5000SPL   $4800 Class H.C.  15.81 x 10 x 11.93
   
Harrison Labs, Inc. > www.hlabs.com   
AMP9600.X 2ch   $5495  Class D 4.37 x 5.5 x 26

HiFonics > www.maxxsonics.com   
XX-Goliath   $5000  Class D  29.5 x 2.5 x 11.25

JBL Mobile Products > www.jbl.com   
A3000GTi   $4600  Class D 21.5 x 23 x 6.5   
A6000GTi   $6000  Class D 29.34 x 23.5 x 8   
     
Treo Engineering > www.treoonline.com   
CXT 6000.1   $6000 Class D  12.75 x 3 x 28.87   
       
TRU Technology > www.trutechnology.com   
A Class-1   $5200 Class A  15.62 x 16.37 x 3.68

Zapco > www.zapco.com   
C2K-4KW   $6599 Class D  7.18 x 10.3 x 19.5

(DEI) Directed Electronics - Security
Viper - Security
Clifford - Security
Python - Security
Avital - Security
Hornet - Security
Valet - Security
Rattler - Security
Sidewinder - Security
Wasp - Security

Other:
Code Alarm
Black Widow - Security

Main Brands to stay away from are:
Bulldog
Prestige
Audiovox

SVR Batteries
SVR Line SVR 28-12 Sealed AGM Battery
Voltage  12 
Reserve Capacity  40 
Amp Hour  28 
CCA*  600 
Max Amps  2400 
Length  6.88"
Width  6.50" 
Height  4.88"
Weight  23lbs 
MSRP  $112.00 
Note: *per Midtronics tester OC612A

SVR Line SVR 28-12 Sealed AGM Battery
Voltage  12 
Reserve Capacity  48 
Amp Hour  31 
CCA*  500 
Max Amps  N/A 
Length  7.75"
Width  5.00" 
Height  7.25"
Weight  24lbs 
MSRP  $96.00 
Note: *per Midtronics tester OC612A

SVR Line SVR 50-12 Sealed AGM Battery
Voltage  12 
Reserve Capacity  90 
Amp Hour  55 
CCA*  600 
Max Amps  1800 
Length  9.30"
Width  5.50" 
Height  9.25"
Weight  38lbs 
MSRP  $143.00 
Note: *per Midtronics tester OC612A

SVR Line SVR 75-12 Sealed AGM Battery
Voltage  12 
Reserve Capacity  150 
Amp Hour  75 
CCA*  900 
Max Amps  2650 
Length  10.0"
Width  6.50" 
Height  8.25"
Weight  55lbs 
MSRP  $266.00 
Note: *per Midtronics tester OC612A
 
SVR Line SVR 100-12 Sealed AGM Battery
Voltage  12 
Reserve Capacity  150 
Amp Hour  80 
CCA*  800 
Max Amps  2600 
Length  10.0"
Width  6.50" 
Height  9.25"
Weight  57lbs 
MSRP  $177.00 
Note: *per Midtronics tester OC612A

OHM'S LAW 
BASE FORMULAS
P=I*E
E=I*R     

TO FIND VOLTAGE
E=P/I
E=I*R
E=SQR(P*R) 

TO FIND CURRENT
I=P/E
I=E/R
I=SQR(P/R) 

TO FIND POWER
P=I*E
P=E2/R
P=I2*R 

TO FIND RESISTANCE
R=E2/P
R=E/I
R=P/I2 

P = Power in Watts
E = Electromotive Force in Volts
I = Electrical Current in Amps
R = Electrical Resistance in Ohms
SQR = Square Root 

%of amp rating....Opening time 
110%..................4 hours minimum 
135%..................1 hour maximum 
200%..................5 minutes maximum

Wire Gauge Recommended
Wire Gauge ............Maximum Fuse Size
00 awg...................400 amps
0 awg.....................325 amps
1 awg.....................250 amps
2 awg.....................200 amps
4 awg.....................125 amps
6 awg.....................80 amps
8 awg.....................50 amps
10 awg.....................30 amps
12 awg.....................20 amps
14 awg.....................15 amps
16 awg.....................7.5 amps

Total Voltage Lose: 1.453
Amplifer Rated Power: 3,600w
Ampilifer Power without Losses: 3,359w
Ampilifer Power after Losses: 3,005w

small  = high resistance = reduced current flow
large = lower resistance = increased current flow

Electrical System Factory Alternator(s)
Avenger Sebring Years 1997 - 1999
6 Cylinders 153 N 2.5L MFI, Dodge Avenge/Chrysler Sebring
Note: Mitsubishi, 110 Amp Alternator.

Avenger Sebring Years 1997 - 1999
6 Cylinders 153 N 2.5L MFI, Dodge Avenge/Chrysler Sebring
Note: Mitsubishi, 110 Amp Alternator.

4 Cylinders 122 Y 2.0L MFI DOHC,  Dodge Avenge/Chrysler Sebring
Note: Mitsubishi, 85 - 90 Amp Alternator.

System Design Assistant
Determines Max Amplifer Power per Power Wire Size

Quick Reference: This table shows the amount of current flow which will cause a 1/2 volt drop in a 15 foot run of cable. Many people consider 1/2 volt to be the maximum acceptable voltage loss in a system's main power wire. The 'total amp power' is the total maximum unclipped RMS power output‡ of all of the amplifiers combined. It is based on 60% efficiency (for class AB amplifiers) and a battery voltage of 13.8 volts. For all of the calculators and tables on this page, unless otherwise noted, 'max power' is the RMS power output when the amplifier is on the threshold of clipping. 

Wire (GA) ……………..   Current Flow   …………………   Max Total Amp Power
1/0   …………………   330 amps   ……………..   3414 watts
1   …………………   262 amps   ……………..   2710 watts
2   …………………   208 amps   ……………..   2151 watts
3   …………………   165 amps   ……………..   1707 watts
4   …………………   131 amps   ……………..   1355 watts
5   …………………   104 amps   ……………..   1075 watts
6   …………………   082 amps   ……………..   0853 watts
7   …………………   065 amps   ……………..   0677 watts
8   …………………   052 amps   ……………..   0537 watts
9   …………………   041 amps   ……………..   0427 watts
10   …………………   033 amps   ……………..   0339 watts
11   …………………   026 amps   ……………..   0269 watts
12   …………………   021 amps   ……………..   0213 watts
13   …………………   016 amps   ……………..   0169 watts
14   …………………   013 amps   ……………..   0134 watts

Solid Wire Dimensions and Resistance
A.W.G. ……………Ohms per foot…………… Circular Mils Diameter…………… Diameter(inches)
4/0   ……………..   0.00004961   ……………..   209322.28   ……………..   0.4575
3/0   ……………..   0.00006250   ……………..   166139.2   ……………..   0.4076
2/0   ……………..   0.00007875   ……………..   131864.77   ……………..   0.3631
1/0   ……………..   0.00009921   ……………..   104661.14   ……………..   0.3235
1   ……………..   0.00012485   ……………..   83069.6   ……………..   0.2882
2   ……………..   0.0001573   ……………..   65932.39   ……………..   0.2568
3   ……………..   0.00019818   ……………..   52330.57   ……………..   0.2288
4   ……………..   0.00024969   ……………..   41534.8   ……………..   0.2038
5   ……………..   0.0003146   ……………..   32966.19   ……………..   0.1816
6   ……………..   0.00039636   ……………..   26165.28   ……………..   0.1618
7   ……………..   0.00049939   ……………..   20767.4   ……………..   0.1441
8   ……………..   0.00062919   ……………..   16483.1   ……………..   0.1284
9   ……………..   0.00079273   ……………..   13082.64   ……………..   0.1144
10   ……………..   0.00099878   ……………..   10383.7   ……………..   0.1019
11   ……………..   0.00125838   ……………..   8241.55   ……………..   0.0908
12   ……………..   0.00158546   ……………..   6541.32   ……………..   0.0809
13   ……………..   0.00199755   ……………..   5191.85   ……………..   0.0721
14   ……………..   0.00251676   ……………..   4120.77   ……………..   0.0642
15   ……………..   0.00317092   ……………..   3270.66   ……………..   0.0572
16   ……………..   0.00399511   ……………..   2595.93   ……………..   0.051

calculatoins in determining many current draw and electrical charging system. Just as long as engine, stereo, and alternator charging system meet or exceded system requirements; I believe you will be fine. Just common sense ever time you up grade or increase stereo system equipment you need to make sure electrical system is able to support.

Few other things to consider as well:

Number(s) if amps
Alternator(s) ratings
(amperage) Amps current draw at daily and peak levels
Battery(s)
car engine and accessory current (head lights, a/c, back window defroster, windshield wipers, and interior lights, etc.)
Power wire.

200 - 400 amp High Output Alternators are available. Just as long as there are self regualting, and (altough have an option for with/or without regualtion it is usually better to find them regulated) "this option is usually intended for veteran SPL competitor.

High Output (H.O.) Alternators

Powermaster
7501 Strawberry Plains Pike
Knoxville, TN 37924
Phone: 865-688-5953
Website: http://www.powermastermotorsports.com/index.html
Contact Name: Coy Hudnall ext. 250

MECHMAN
7076 Oak Hill Road
Hesperia, CA 92345-0730
Tel: (760) 956-7596
Orders: (Toll free call) (888) 632-4626
Website: http://www.mechman.com
Contact Name: Dennis Moore
Irragi alternators 
n/a
LaVergne TN
Phone: 615-287-7991
Email: dominick@tds.net
Contact Name: Dominick Iraggi

H.O. Alternators
n/a
n/a
TOLL FREE: 1.866.446.8878
Website: http://www.h-o-alternators.com/index.htm

Ohio Generator
134 N. Chapel St
Louisville, Ohio 44641
Phone: 330-875-6677
Fax: 330-875-6688
E-mail Address: info@ohiogen.com
Website: http://www.ohiogen.com

This calculator will tell you the required alternator rating for your vehicle at peak usage. It may not be possible to meet these specs with a single alternator or even necessary to. Many other factors come into play such as driving and listening styles. It will however give you the ideal answer and a good indication of your present alternator's ability to supply your system.  It takes into account the current draw of the OEM electrical accessories, the current draw from your amplifiers at peak draw and the current draw from any other electrical accessories (neon, fans, strobes...) in your vehicle.

Alternator Specs
 
Calculate the Required Alternator Rating for Your Vehicle 
Input 
Total Amplifier Power?   1500Watts 
Amplifier Efficiency?
(Class A/B Typically 50-60% Class D 70-80%)  85% 
Charging System Voltage? 13.8Volts 
OEM Alternator Rating? (Typically 60-130Amps)  110Amps 
Total Current Draw of Accessories Added Other then Amplifiers?  65Amps 
Output 
Required Current Rating of Alternator at Peak:  303Amps 
Power Drawn From Charging System:  1765Watts
 
Calculate the Required Alternator Rating for Your Vehicle 
Input 
Total Amplifier Power?   3000Watts 
Amplifier Efficiency?
(Class A/B Typically 50-60% Class D 70-80%)  85% 
Charging System Voltage? 13.8Volts 
OEM Alternator Rating? (Typically 60-130Amps)  110Amps 
Total Current Draw of Accessories Added Other then Amplifiers?  65Amps 
Output 
Required Current Rating of Alternator at Peak:  431Amps 
Power Drawn From Charging System:  3529Watts

Current Draw by Power Total RMS
Power (watts)..................Current Amps
100...............................16       
200...............................32
400...............................64
600...............................96
800...............................128
1000.............................160
1200.............................172
1400.............................188

Power & Ground Cable Specs Cable Size
Wire Gauge..............Current CapacityAmperage (amps)
1/0...........................350
2..............................225
4..............................150
8..............................100
10.............................60
12.............................40
14.............................25
16.............................15

Recommended Cable Size by Power and Distance
RMS Pwr (watts) Distance
.............. 4 ft.......... 8 ft........... 12 ft........ 16 ft......... 20 ft............
100......... 10 ga....... 10 ga....... 8 ga......... 8 ga........ 4 ga
200......... 10 ga....... 8 ga......... 8 ga......... 8 ga........ 4 ga
400......... 8 ga......... 8 ga......... 4 ga......... 4 ga........ 4 ga
600......... 8 ga......... 4 ga......... 4 ga......... 4 ga........ 4 ga
800......... 4 ga......... 4 ga......... 4 ga......... 2 ga........ 2 ga
1000....... 4 ga......... 4 ga......... 2 ga......... 2 ga........ 2 ga
1400....... 4 ga......... 2 ga......... 2 ga......... 2 ga........ 2 ga

Wiring Harness& Dash Kits, Wiring, etc[/i][/u]
Amp of America® ••
Metra Online® ••  
Scosche® ••

Amplifier Wiring Kits, Interconnects  [/i][/u]
Audopipe® •• 
Lightning Audio® •• 
Memphis® •• 
Phoenix Gold® •• 
Rockfordfasgate® •• 
Stinger® •• 
Streetwires® ••   
Tsunami® •• 

Competition Circuits:[/i][/u]
dB Drag Racing Association® SPL
IASCA/Idbl Association® SPL/SQ
Meca Car Audio®  SPL/SQ
USACi®  SPL/SQ
NSPL®  SPL
Slapshow®  SPL



Pre Fab Enclosures [/i][/u]
Audioenhancers® ••
Subzone® ••
Q-logic® ••
The Woodshop® ••
R/T Boxes® ••
Sub Zero® ••

http://www.12volt.com/images/menu_bar_101003_04.gif[/URL][/IMG][/URL]

Termpro

For reference on power, ground, and etc.


Basic Car Audio Electronics

Enclosure 
Enclosure air space calculator

CEA’s Mobile Electronics Certified Professional (MECP)

Reference:
Wiring Information

Originally posted by: 2000Avenger Sport, the following is for “Reference Only”

Optima Red Top "Starter", Optima Yellow Top "Deep Cycle", Optima Blue Top "Marine"

----
Factory Battery: 86, 26, 36 Series CCA ranges from 450 - 525, & 650 CA. 
(Price Range: $34.99 - $ 54.99) +tax
(Core Charge: $xx.xx )
(Warranty 3 - 7 Yr Manufacturer Warranty)

Optima Red Top - Small Case
Model Number: 34 & 34R
Voltage: 12v
Cold Cranking Amps @ 0F: 800
Cranking Amps @ 32F: 1000
Reserve Capacity: 110
Capacity (C/20 Rate): 50
Internal Resistance (ohms): .0030
Dimensions:
Length: 9 5/16", Width: 6 13/16", Height: 7 5/8"
Mimimum Weight (lbs) 37.9 lbs
Type Post/Terminal: SAE Post
BCI Group: 34 & 34R

Model Number: 25 & 35
Voltage: 12v
Cold Cranking Amps @ 0F: 720
Cranking Amps @ 32F: 910
Reserve Capacity: 90
Capacity (C/20 Rate): 44
Internal Resistance (ohms): .0030
Dimensions:
Length: 9 5/16", Width: 6 13/16", Height: 7 5/8"
Mimimum Weight (lbs) 31.7 lbs
Type Post/Terminal: SAE Post
BCI Group: 25 & 35

Optima Red Top - Medium Case
Model Number: 75/25
Voltage: 12v
Cold Cranking Amps @ 0F: 720
Cranking Amps @ 32F: 910
Reserve Capacity: 90
Capacity (C/20 Rate): 44
Internal Resistance (ohms): .0030
Dimensions:
Length: 10", Width: 6 7/8", Height: 7 13/16"
Mimimum Weight (lbs) 33.1 lbs
Type Post/Terminal: Dual SAE & GM Post
BCI Group: 75/35

Model Number: 34/78
Voltage: 12v
Cold Cranking Amps @ 0F: 800
Cranking Amps @ 32F: 1000
Reserve Capacity: 110
Capacity (C/20 Rate): 50
Internal Resistance (ohms): .0030
Dimensions:
Length: 10", Width: 6 7/8", Height: 7 13/16"
Mimimum Weight (lbs) 38.8 lbs
Type Post/Terminal: Dual SAE & GM Post
BCI Group: 34/78

Alternator: 13.3 to 15.0 volts, no amperage limit.
Battery charger: 13.8 to 15.0 volts, 10 amps maximum, 6-12 hours approximate.
Rapid Recharge:
Maximum voltage 15.6 volts (regulated).
Maximum current: No limit as long as temperature < 125°F (51.7°C).
Maximum recharge time: Charge until current drops below 1 amp.

Float charge: 13.2 to 13.8 volts, 1 amp maximum current, time indefinite (at lower voltage).

----

Optima Yellow Top - Small Case
Model Number: D75/25
Voltage: 12v
Cold Cranking Amps @ 0F: 650
Cranking Amps @ 32F: 810
Reserve Capacity: 98
Capacity (C/20 Rate): 48
Internal Resistance (ohms): .0030
Dimensions:
Length: 9 5/16", Width: 6 13/16", Height: 7 5/8"
Mimimum Weight (lbs) 37.8 lbs
Type Post/Terminal: Dual SAE & GM Post
BCI Group: 75/25

Model Number: D35
Voltage: 12v
Cold Cranking Amps @ 0F: 650
Cranking Amps @ 32F: 810
Reserve Capacity: 98
Capacity (C/20 Rate): 48
Internal Resistance (ohms): .0030
Dimensions:
Length: 9 5/16", Width: 6 13/16", Height: 7 5/8"
Mimimum Weight (lbs) 36.4 lbs
Type Post/Terminal: SAE Post
BCI Group: 35

Optima Red Top - Medium Case
Model Number: D34/78
Voltage: 12v
Cold Cranking Amps @ 0F: 750
Cranking Amps @ 32F: 870
Reserve Capacity: 120
Capacity (C/20 Rate): 55
Internal Resistance (ohms): .0028
Dimensions:
Length: 10", Width: 6 7/8", Height: 7 13/16"
Mimimum Weight (lbs) 43.5 lbs
Type Post/Terminal: Dual SAE & GM Post
BCI Group: 34/78

Model Number: D34
Voltage: 12v
Cold Cranking Amps @ 0F: 750
Cranking Amps @ 32F: 870
Reserve Capacity: 120
Capacity (C/20 Rate): 55
Internal Resistance (ohms): .0028
Dimensions:
Length: 10", Width: 6 7/8", Height: 7 13/16"
Mimimum Weight (lbs) 42.9 lbs
Type Post/Terminal: SAE Post
BCI Group: 34

Alternator: 13.65 to 15.0 volts, no amperage limit.
Battery charger: 13.8 to 15.0 volts, 10 amps maximum, 6-12 hours approximate.
Cyclic Applications: 14.7 volts, no current limit as long as battery temperature remains below 125°F (51.7°C). When current falls below 1 amp, finish with 2 amp constant current for 1 hour.

Rapid Recharge:
Maximum voltage 15.6 volts (regulated).
Maximum current: No limit as long as temperature <125°F (51.7°C).
Maximum recharge time: Charge until current drops below 1 amp.

Float charge: 13.2 to 13.8 volts, 1 amp maximum current, time indefinite (at lower voltage).
 

 Originally posted by: 2000Avenger Sport, the following is for “Reference Only”

Most subwoofers coils are common coil unless custom built:
( 1.0, 1.4, 1.5, & 2.0 ) ohm Impedance quad voice coils (QVC)
( 1.0, 1.4, 1.5, 2.0, & 4.0 ) ohm Impedance dual voice coils (DVC)
( 2.0, 3.0, 4.0, 8.0, & 12.0) ohm Impedance single voice coil. (SVC)

+Custom Coil Configuratins are avaiable as well, Wiring configurations will determine the load the amp.

Enclosures: Sealed vs Ported/Vented

Sealed enclosures are nice because they usually take up less space than ported enclosures, and have better acoustical qualities than most ported enclosures in vehicles. But a very well aligned ported enclosure can sound just as good, if not better than a sealed alignment. A lot of bad sounding ported subs are bad alignments in the first place. They are usually very high Q (Qts) drivers shoved in enclosures that are too small and tuned too high or too low. Enclosures that are tuned too high will sound shallow from the lack of deep bass. Enclosures tuned too low will sound rumbly due to sub sonics 'rumbling around'. Enclosures that are too small will either have a very bad peak, or a very bad dip in the response due to mis-alignment. And finally, drivers with too high a Qts will sound tubby because their electrical "suspension" isn't up to the task of maintaining a good enough restoring force without the aid of good air spring (which sealed enclosures have).

Sealed advantages and disadvantages

Easy to design and build.
Very forgiving of errors in design and construction.
High power handling but one of the least efficient enclosure designs.
Tight bass with excellent transient response, maximum driver excursion at resonant frequency and higher distortion levels.
Gentle roll-off after F3 @ -12 dB/octave.
Driver retains enclosure damping below Fc.
Unless driver is specially designed for a small optimum sealed enclosure, the optimum alignment may require a large box.

Ported advantages and disadvantages

Fairly easy to design and build, may take some time to tune properly.
Enclosure must be fairly precise to attain desired performance.
More efficient than sealed, need less amplifier to get higher SPL's.
Good transient response with optimum alignments, minimal driver excursion at resonant frequency and reduced distortion.
F3 can be set much lower than a sealed enclosure, but roll-off after F3 is @ -24 dB/octave.
Driver loses enclosure damping below Fb, and may lose control with very low frequencies.
Unless driver is specially designed for a small optimum ported enclosure, the optimum alignment may require a very large box.
 
Theile-Small Parameters [/u][/b]

B............... Magnetic flux density in gap, in Tesla-meters (tm) 
BL............... The magnetic strength of the motor structure. 
C............... Propagation velocity of sound at STP, approx. 342 m/s 
Cas............... Acoustical equivalent of Cms 
Cmes............... The electrical capacitive equivalent of Mms, in farads 
Cms............... The driver's mechanical compliance (reciprocal of stiffness), in m/N 
D............... Effective diameter of driver, in meters 
F3............... -3 dB cutoff frequency, in Hz 
Fb............... Enclosure resonance (usually for bass reflex systems), in Hz 
Fc............... System resonance (usually for sealed box systems), in Hz 
Fs............... Driver free air resonance, in Hz. This is the point at which driver impedance is maximum. 
L............... length of wire immersed in magnetic field, in meters 
Lces............... The electrical inductive equivalent of Cms, in henries 
L ...............Length of wire immersed in magnetic field, in meters 
Ms............... The total moving mass of the loudspeaker cone. 
Mmd............... Diaphram mass, in grams 
Mms............... The driver's effective mechanical mass (including air load), in kg 
n0............... The reference efficiency of the system (eta sub 0) dimensionless, usually expressed as % 
p (rho)............... Density of air at STP 1.18 kg/m^3 
Pa............... Acoustical power 
Pe............... Electrical power 
Q............... The relative damping of a loudspeaker 
Qa............... The system's Q at Fb, due to absorption losses; dimensionless 
Qec............... The system's Q at resonance (Fc), due to electrical losses; dimensionless 
Qes............... The driver's Q at resonance (Fs), due to electrical losses; dimensionless 
Ql............... The system's Q at Fb, due to leakage losses; dimensionless 
Qmc............... The system's Q at resonance (Fc), due to mechanical losses; dimensionless 
Qms............... The driver's Q at resonance (Fs), due to mechanical losses; dimensionless 
Qp............... The system's Q at Fb, due to port losses (turbulence, viscousity, etc.); dimensionless 
Qtc............... The system's Q at resonance (Fc), due to all losses; dimensionless 
Qts............... The driver's Q at resonance (Fs), due to all losses; dimensionless 
R............... Ripple, in dB 
Ras............... Acoustical equivalent of Rms 
Res............... The electrical resistive equivalent of Rms, in ohms 
Revc............... DC voice coil resistance, in ohms 
Rg............... Amplifier source resistance (includes leads, crossover, etc.), in ohms 
Rms............... The driver's mechanical losses, in kg/s 
Sd............... Effective piston radiating area of driver, in square meters 
SPLo............... Sound Pressure Level, usually measured at 1 watt, at 1 meter in front of the loudspeaker 
Vas............... "Equivalent volume of compliance", this is a volume of air whose compliance is the same as a driver's acoustical compliance Cms (q.v.), in cubic meters 
Vd............... Maximum linear volume of displacement of the driver (product of Sd times Xmax), in cubic meters. 
Xmax............... Maximum peak linear excursion of driver, in meters 

dB......... The unit of measure of sound level. Based on a logarithmic scale. Typically, a 3 dB increase in sound level corresponds to a doubling of amplification power. An increase of +10 dB is a doubling of perceived loudness.
 
Sound Pressure Level. A measurement of the level of sound energy usually measured in decibels (dB) SPL (sound pressure level) can be measured in dB. 0 dB represents the threashold of normal human hearing, 130 dB represents the threshold for pain, 140 dB causes permanent hearing damage, and 150 dB can cause instant deafness.

75% of Common Car Audio Manufactuers Links
-A- ® •• .
Adassa Audio® ••
a/d/s® •• appears no be no longer in Business
Addictive Audio, Inc® ••
Adire Audio®  •• appears no be no longer in Business
Aiwa® ••
Alphasonik® ••
Alpine® ••
Alumapro® ••
American Bass® ••
Ample Audio® ••
Arc Audio® ••
AudioControl® ••
Aura Sound® ••
Atomic Loudspeakers® ••
Audiobahn Inc® ••
AudioControl® ••
AudioQue® ••
Audison® ••
Audiovox® ••
Autopage® ••
Autotek®  ••
AVI Sound International®  ••

-B- ® •• .
Bazooka®  ••
Black Widow Sercuity
Blackmore Mobile
Blaupunkt®  ••
Boston Acoutics®  ••
Bostwick®  ••
Boss Audio Systems®  ••
Brax / Helix®  ••


-C- ® •• .
Cadence Sound Systems®  ••
Canton Electronics Corp®  ••
CDT Audio®  ••
Celestra®  ••
Cerwin Vega®  ••
Clarion®  ••
Cliff Design®   •• appears no be no longer in Business
Concept Car Audio®  ••
Coustic®  ••
Crossfire®  ••
Crunch®  ••
Crystal MobileSound®  ••

-D- ® •• .
dB Drive®  ••
DHD Power Crusier®  ••
Diamond Audio®  ••
Diesel Audio®  ••
Digital Audio, Inc®  ••
Digital Designs®  ••
Directed (DEI)®  ••
DLS®  ••
Dynaudio®  ••

-E- ® •• .
Earthquake®  ••
Eclipse (Fujitsu Ten)®  ••
Elemental Designs®  ••

-F- ® •• .
Focal®  ••
Fusion®  ••

-H- ® •• .
Hart Professional®  ••
Harrison Laboratory®  ••
Hifonics®  ••
Hollywood Sound Labs International®  ••

-I- ® •• .
Illusion Audio®  ••
Image Dynamics®  ••
Incriminator Audio®  ••
Infinity®  ••
Interfire Audio, Inc®  ••

-J- ® •• .
JBL/Crown Technologies®  ••
JL Audio®  ••
JVC®  ••

-K- ® •• .
Kenwood / Kenwood Excelon®  ••
Kicker®  ••
Kove®    •• appears no be no longer in Business

-L- ® •• .
Lanzar®  ••
Lightning Audio®  ••
Linear Power®  ••

-M- ® •• .
MA Audio®  ••
Massive Audio®  ••
MB Quart®  ••
McIntosh®  ••
Memphis®  ••
MMats®  ••
Mobile Authority® •• appears no be no longer in Business
Morel Acoustics USA, Inc.®  ••
MTX Audio®  ••

-N- ® •• .
Nakamichi®  ••

-O- ® •• .
Orion®  ••
OZ Audio®  ••
Panasonic®  ••

-P- ® •• .
Phoenix Gold®  ••
Pioneer/Premier®  ••
Planet Audio®  ••
Polk Audio®  ••
PRECISION POWER ( PPI )®  ••

-R- ® •• .
Rainbow®  ••
Resonant Engineering(RE)®  ••
Rockford Fosgate®  ••

-S- ® •• .
SPL Dynamics®  •• (Finish/Finland Based)
SPL Audio®  •• (U.S.A Based)
Sony®  ••
Soundstorm®  ••
Soundstream®  ••
Sondstrom ®  ••
Swiss Audio, Inc.®  ••

-T- ® •• .
Treo Engineering®  ••
Tsunami®  ••
Tru Tech® ••

-U- ® •• .
US Amps®  ••
US Acoustics®  ••
Ultimate Sound® •• 
Ultralinear®  ••

-V,Y,& Z- ® •• .
Visonik®  ••
YZEN U.S. Audio ••
Xtant®  ••
Zapco®  ••