Sony HU, 2 amps, and a sub - Wiring help pls

[caper26]

Hi guys. Recently upgraded some car audio for my Z-28, and I need to get under there and rewire a bunch of stuff, so I want to install this properly with shrink wrap, etc. I have little knowledge of car audio beyond basic sppeakers and amps and never installed a sub before.

List of gear:

Head Unit:

SOny Xplod CDX-GT550UI

Amplifiers:

Rockford Fosgate P8004 - 4 Ch , Low & high pass filters

Legacy LA220 - 2-ch bridgeable (2X75 or 1X150 W RMS). Low pass filter only

Speakers:

Sony Xplod 6X9 (2) -Rear

Kenwood 4" (2) -Front

Sub:

Alpine SWS 1243D 12" dual 4 ohm voice coil

Rockford Fosgate Manual: http://a248.e.akamai.net/pix.crutchfield.com/Manuals/575/575P4004.PDF

Sony Head Unit Install manual: http://www.docs.sony.com/release/CDXGT550UI_install_EN_ES.pdf

Alpine SWS-1243D specs: http://www.crutchfield.ca/alpine_type_s_sws_1243d_12_dual_4_ohm_component_s_p/500sws1243.htm

My first guess was to connect the RF amp with both pre-outs and power front & rears with it, then use the pass thru and use the Legacy in bridged mode to power the Sub, and the RF to power both front and rear speakers? The rear of the head unit has no 'dedicated' sub out, but rather a Rear/Sub Out, so I think you have to tell it in the setup, which mode to be in. (??).

What is the best way to wire everything together with what I have?

Click to read more...

 

[caper26]

edited links...

 

[dirtyunclerandy 10+ year member]

You can use y splitters to split the front rca's. Then run your 4 channel rca's off those. Use the rear out for your sub amp.

 

[caper26]

You can use y splitters to split the front rca's. Then run your 4 channel rca's off those. Use the rear out for your sub amp.

I was told though, that the Legacy was a mismatch to impedance? I need more details please.

 

[dirtyunclerandy 10+ year member]

Probably, guessing it can be bridged at 4 ohms. That sub can be wired to 2 ohms. Won't work to well.

 

[caper26]

ok, I pulled the sub to see what they had going on previous to me. Here are the photos. Is this the right way, considering the amp I will be using (the LA220) and how do I connect the leads to the amp?