GXP Monsoon Speakers
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Joined: Mar 2009
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From: Fort crack homie
Except as I noted, the wires from the door don't have much bass at all. I spliced the wires that go to the door as the high level input to my 2 channel stereo amp, then amplified that to the rear speakers so they have their own amp. I even flipped the bass boost switch and there is hardly any bass coming out of them. They're kicker 6x9'* too, so they're supposed to have a bit of a punch.
What I did to solve the bass problem was splice the original outputs to the rear 6x9'* (which had only bass) into a high level to RCA converter, to a mono amp. That part was actually pretty easy.
What I did to solve the bass problem was splice the original outputs to the rear 6x9'* (which had only bass) into a high level to RCA converter, to a mono amp. That part was actually pretty easy.
so what i meant is keep the speaker running off the same wire but connect the tweeter in the middle to the doors, and i think that should get it going
but, never tried it
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Joined: Jan 2006
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From: Purgatory, Pennsylvania
I did the same as X. Spliced the rear speaker outputs to a 400 Watt Alpine Mono amplifier feeding an 8" square Kicker sub set down in the middle of the back ledge. It accepts high level input and doesn't need a converter. Makes my hard rock alot better with the stock system intact. Back seats are seldom occupied, and when they are, they have to deal with the nice thump bouncing off the rear glass. You can never have enough "audible" bass for my genre of music. 
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Joined: Mar 2011
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From: The Motor City
If you buy a 3 channel crossover off ebay than you can run a four channel amp to run 6 speakers in the car. I have my 6x9'* running from two channels on the amp and the passive 3 way crossover on the 2 other channels. The crossover has outputs for Mids, Midwoofer, and tweeters which allows me to the doors and tweeters all in the factory positions. If you do run your amps off the factory head unit you can just splice in to the factory amp wiring in the trunk instead of trying go from the doors. Use the front speaker out for the highs like they said and the rear for lows. Or get a JL AUDIO XD600, its a 6 channel amp I did it a month ago in my other car so much easier than everything else...
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