1. Ohms & Impedences, How to Select the correct amplifier and load
(Electronics/Car Audio Electronics)

... for "free" just by bridging your 4ohm speakers ! Series Wiring: When speakers, or Duel Voice Coil subwoofers, are wired in Series, it means one +ve & -ve are connected to each other, and the remaining ...

2. Boyles Law, how it applies to an SPL system
(Technical/Theory and Physics)

... the amount of air the woofers can displace. The distance the cone moves forward times the area of the cone determines the displacement of the speaker. So, how does this relate to pressurizing the cab of ...

3. Car Audio on a Budget, The $1000 System
(Install/Car Audio Installation)

The $1000 Budget System. The $1000 budget unlocks a lot more potential to build a great system. At this price point you’re looking at adding amplifiers and subwoofers to your system, so you are in “big ...

4. Building Your Own Subwoofer Enclosure
(DIY Articles/Car Audio Do It Yourself)

Building Your Own Subwoofer Enclosure For my example I'm building a small enclosure to suit a single 12" JBL subwoofer to go into a Honda Civic hatchback. Because the enclosure is only 2.4 cubic foot ...

5. Tools for Designing your own Subwoofer Enclosure
(DIY Articles/Car Audio Do It Yourself)

Tools for Designing your own Subwoofer Enclosure Sure you can buy a pre-fabricated woofer enclosure like your buddies, or you could build your own. Nothing sounds better than an enclosure purposely designed ...

6. Inverting Subwoofers
(DIY Articles/Car Audio Do It Yourself)

Inverting Subwoofers Inverting your subwoofers is a great way to enhance your subwoofer systems look. A big motor and basket structure looks a lot more impressive than the cone, and its a free modification ...

7. Subsonic, what is it and how do I adjust it ?
(Electronics/Car Audio Electronics)

... can feel it. Because you cant hear it, and they're prone to damaging woofers, filtering subsonics is a desirable characteristic in subwoofer amplifiers.A subsonic filter is used differently in sealed ...

8. Audio Glossary of Terms
(Technical/Definitions)

... to woofers, midrange and treble to mids and tweeters through the use of passive crossovers) Tri-Amp is the use of three amplifiers in the same manner with the audio signal divided into three separate bands ...

9. Enclosure & Port Selection, Definitive Guide
(DIY Articles/Car Audio Do It Yourself)

Enclosure & Port Selection, Definitive Guide  Should I go ported or sealed?  This gets asked a lot, and here's how you find out! You need to calculate your woofers Efficiency Bandwidth Product ...

10. 4 x 12s and 3000wrms in a Kia Sportage
(Install/Car Audio Installation)

... amplifiers and 2 Clarion 12" subs in separate sealed boxes. His main requests were a ported box to fit 4 x 12" subwoofers (Kenwood) and for it to be under the window line (a tough task).After several ...

11. Recone subwoofer or any speaker
(DIY Articles/Car Audio Do It Yourself)

Sometimes you'll need to recone a speaker or subwoofer. Sometimes the coil burns out, the tinsel breaks or a screw driver goes through the cone ! There's a lot of reasons that your speakers damaged, but ...

12. Getting into SPL Competition, the begginers guide.
(Technical/Theory and Physics)

... power only comes from certain impedances so consider this when choosing an amp and sub combo. IE. Don’t get a DVC 4ohm woofer and amp that makes best power at 1ohm ! Subs: Good woofers last longer and ...

13. The ABC 8th Order Bandpass
(DIY Articles/Car Audio Do It Yourself)

... a traditional 6th order where the subwoofer is between two enclosures vented to atmosphere, one of the vents fires into the other enclosure which is then vented into the atmosphere. The narrow band width ...

14. Kicker Announces 2010 ZX Series Amplifier Models
(News/Latest)

... hybrid, and absurd single-channel subwoofer amps round out a hard-working, noise-free lineup with heat sinks that can be personalized with edgy vinyl skins. An often overlooked benefit is that each individual ...

15. Quarter Wave Theory for Building Walls
(Technical/Theory and Physics)

The 1/4 Wave or ABCD Theory was a big fad in SPL for quite some time, especially in walled subwoofer systems. With this article I hope to explain what it is, how to calculate it and you can draw your own ...

16. Sentra Installation (step by step gallery)
(Install/Car Audio Installation)

... It produced 146db from its two 10" woofers and 2000WRMS amplifier. Sentra 0|ap101.jpg|The Car|Just a normal 1994 Sentra sedan 0|ap102.jpg|The Trunk|Looks a bit empty, lets fill it with something ...

17. Twice as loud ? Lets talk dB's
(Technical/Theory and Physics)

... first one !3. Tune the enclosure using our nifty "SPL tuning guide"If you have a quality amp that can handle low impedences, you can cheat a bit. Have a duel 2ohm woofer wired in series for 4ohm and 1ohm ...

18. Root Means Square, RMS Means Real Power. AKA. Lets measure my amps REAL power output
(Electronics/Car Audio Electronics)

... to test with.. 1. Attach your woofer to your amp2. Place the clamp meter over the +ve wire going from the amp to the sub3. Place the two probes on the +ve & -ve wire from the amp to the sub4. Set ...

19. How to use an Oscilloscope (CRO) to identify clipping
(Electronics/Car Audio Electronics)

Here's a quick & dirty intro to the CRO (Cathode Ray Oscilloscope), how to set it up properly & how to identify clipping. For this test I've used: BWD-509B CRO Digitor 707 Digital Multimeter ...

20. CRX Installs
(Install/Car Audio Installation)

... B Kicker System|Street B system with Kickers L7 12" in standard CRX enclosure 0|E6814W1M6842P2C.jpg|Street Tester|Testing enclosure for CRX, features external ports and a single 10" woofer 0|engine.jpg|Engine ...