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Re: Hooking up amp to stock head unit? (DCBStingray)
Yes, it is possible and has been done many many times. You DO NOT need to buy an interface box. 99HT has done all of the research on the C5 Bose system and generated an article that lists all of the information needed to add an amp to your stock system, plus other modifications to improve the base system.
All you need to do is run your main power cable from your battery to the amp, ground the amp to the chassis and also run a power-on signal wire from the HU to the amp. Next attach standard RCA cables to the HU Pre-Amp Output wires and run those to your amp inputs and you are all set.
I have pasted a portion of Tech Tip below and slightly modified it to help you.
- From 99HT's Tech Tip -
The Bose CD/Cassette head unit can be utilized without the Bose signal conditioner, Bose sub-woofer amps and speakers by using the head unit four pre-amp outputs to drive external aftermarket power amplifiers and speakers. Use the Shield wires or chassis for signal return. DO NOT USE signals Common on C4(13),LT BLU or Common C4(7),YEL. These signals are only to interface with the Bose signal conditioner.
AMP Wiring info:
The following are the Bose head unit 4 channel pre-amp outputs
Signal CD/Radio Color code
LF out C4(9) TAN/BLK
RF out C4(10) LT GRN/BLK
LR out C4(11) BRN
RR out C4(12) DK BLU
Common C4(13) LT BLU, DO NOT USE FOR EXTERNAL POWER AMP
Shield C4(14) Bare wire
Ground C4(15) BLK
The head unit Radio "ON" output can be used to switch on external power amps. Be safe and use an in-line .5 amp fuse to protect head unit.
The following are the head unit power and control signals:
Signal CD/Radio connection
SW +12 out C1(8) DK GRN, Radio "ON" signal
Power C1(10) ORG
ground C1(5) BLK/WHT