kwollaston

Hi guys, I recently purchased my first car, a 1995 Chrysler Concorde w/ Infinity system, and I am in the process of planning an upgrade to the sound system.
As is, it has a stock amp in the trunk, a pair of 3.25" speakers for the dash, a pair of 5.25" speakers for the doors, and a pair of 6x9s for the rear deck.

I plan on replacing them with a pair of RF P132s (20w RMS) for the dash, a pair of RF P152s (40w RMS) for the doors, and a pair of RF P1694s (75w RMS) for the rear deck.

I already have a pair of RF P2D4-12s (400w RMS) in a sealed enclosure for the trunk.

The head unit that came with the car is a DEH-1900MP, which has a single stereo preamp output, and 22w RMS/ch amp.

As for the amplifiers, I plan on getting a 4-channel for the speakers and a monoblock for the subwoofers. I don't have too much money to spend on them and I plan on upgrading them to some real RF amps when I get the money so understand they are only temporary. My choice for the monoblock amp is a BOSS Audio NX1800.1 (900w RMS @ 4 ohm). For the 4-channel something like a BOSS Audio CE404 (50w x4 RMS @ 4 ohm). This brings me to my questions on the actual install.

1. My head unit has only one stereo preamp output. Without replacing HU, how would I hook these two amps up to it? Would a splitter be sufficient?
2. Since I have 6 speakers and only a 4 channel amp, would it be possible to just wire the 20w RMS dash speakers to the HU and leave the door and deck speakers for the amp?
3. How would I remove the rear deck speakers? At first, I thought maybe I could remove the grill which is glued down and then it would expose screws but I thought that was too easy. Do I have to remove my back seat? If so, how?
4. I am also thinking of slightly underpowering my system for now, and choosing a different mono especially because I am only running a stock charging system and am unsure if it would be able to withstand the full 800w+ for the subs and the ~270w+ for the speakers.
5. As far as powering the amps, I was thinking of a 4 guage wire with a fuseholder and a distro block to run power to pair of amps. Would this be wise or no? What fuse size should I use?

Please, any and all recommendations and tips are welcome. I am a newbie to car audio but am an avid DIYer and programmer so I learn quickly.

Dukk

1. Y-cables will be fine. Do it at the deck though and run two or three cables to the back so when you upgrade the deck it is easy.
2. I would consider a component set of speakers so you have the tweeters in the dash and mids in the door, all off an amp. Your idea is ok too if you don't want components.
3. Most likely the back seat has to come out. The bottom pad comes out first by pulling it up and out. On some cars it is bolted to the floor along the front. Then the upper part of the back seat will have bolts at the bottom. Once removed it should lift up and out.
4. Choosing a 500watt amp or 900watt amp isn't really going to make a massive difference to the charging system.
5. 4ga would be the bare minimum. Either run two 4ga kits or find a 2ga or 0ga kit.