SUPERSUB87 said:
Do not run two different subwoofers, big no-no. You'ld be better off concentrating on getting simpler system to sound good. Use the 12, or the 10, not both. if you need/want more punch, get a pair of matching subs. Also do not run different sized subs, or different enclosure sizes or types at the same time... common mistakes these days. More is not always better. There's a reason top sound quality systems do not run setups like this, they dont work right.
Bridging is merely sharing the output from each channel summed into a single channel. In other words, you end up pulling the pos off one channel of your amp, and the negative off the other channel. This effectively utilizes the output from both channels into a single channel. Power output has the potential to double, depending on speaker impedance.
Here is some good info on how to bridge, and the variables surrounding it:
http://www.bcae1.com/bridging.htm
You can run multiple subs off a bridged amplifier, just depends on the speaker imperdances and how you wire them. You casn parallel or series speakers together into a single amplifier channel, its done all the time. Ever seen a setup with a wall of subs... like a dozen or more? You dont think they run an amplifier for each and every one of those subs do you?
Again, consult bcae1, it has all the info on speaker impedance that you need to know.
bcae1.com is an excellent reference site for car audio information. If you plan on doing much of this stuff, save it under your favorites.
I suggest fitting larger diameter speakers in the front, wont have much 'up-front bass' using only 3 inch speakers in the front. Ive also never been a huge fan of 4x10's. Surely there's a way you can fit some round speakers in there that are abit larger than 3"...?
And amplify them. The majority of the sound you hear from your stereo will be coming from your main speakers, not your subs. No sense leaving them unamplified and sounding the 'dirtiest' imo. Headunit amplifiers suck balls, hardcore.
Your later idea, to be frank, is just a mess. How many speakers you plan on running in this thing?? Simple is better, more is (generally) worse. Multiple point sources for your sound to originate from muddy the sound stage and stereo imaging. Its quite popular these days to see show cars with as many speakers stuffed into them as possible. This leads to the notion its a good idea, when in reality sonically speaking its a very bad idea.
In a perfect world, if we had the technology to build such speakers, our stereos would utilize 2, and only 2, speakers. One for the left chaannel, one for the right. Each would play from 20hz to 20khz, no subs, no mids, no tweeters... just one left and one right speaker. Again, if we could build speakers capable of such. This is because, again, the fewer sound sources, you have, the simpler eevrything is, the easier it is to 'get it right'. But we cannot make such speakers, so we settle for having mids, tweeters, etc. But again, just packing as many of those mids and tweets in as possible... not a good idea.
Most people want lots of speakers in order to make it LOUD. Well, there's more than one way to skin that cat. I assure you, the [relatively] simple system Im building would be much much louder than the complicated multiple speaker system you are planning. If you want outpu, dont rely so much on cone area, look into speaker efficiency and power handling.
Ditch the h/u amp idea. Ditch the 3.5's and 4x10's. Ditch the Audiobahn amplifier (ewww). And without a doubt ditch the awful idea of packing so many mediocre speakers into your ride. Simplify, and then work on getting the most you can out of what you have.
Did you guys know the world record for a car stereo was recently broken? Someone has (verifiably) hit over 180 decibels in a vehicle. Nobody had ever hit over 180 before. And he did it... with
ONE subwoofer. Dont fall into the habit that you must have a ton of speakers. Again, simply and maximize potential.
