aftermarket headunit/bose compatibility

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May 30, 2006 | 11:40 AM

ttuner333

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aftermarket headunit/bose compatibility

ok so ive STFA and have not come up with a definitive answer.

1. is it true that all i need to make any aftermarket headunit work with the bose system is the metra harness, euro antenna adapter and faceplate frame?
2. what is this business about a 5v preamp output? the pioneer deh-7700mp is only a 2.2v preout. will this work? what does this mean? can i only use headunits that have a 5v preamp output? any suggestions on a diffrent headunit?
3. last time i attempted to have this done the geniuses at best buy said that putting a headunit would be impossible without getting new speakers. they said it had something to do with the diffrent ohms. will the metra harness definitly fix this, since im planning on doing everything myself this time

all i really want is to have an aftermarket headunit so that i can perhaps install one 10' subwoofer in the back and an amplifier, and possible hook up my ipod as well.

any info or tips is greatly appreciated, thanks again for the help!

May 30, 2006 | 12:36 PM

SpoiledHeeb

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Answers >>>

1. Yes, you need the metra harness, euro antenna adapter (the powered one) and the faceplate. You might also need a ground loop isolator if you experience pops/sounds during on/off and source switching.
2. Most headunits have 2v preouts, but some of the higher end units have 5v preouts. A 5v preout gives you a stronger/cleaner low level signal. My alpine 9851 is 2v and it sounds great.
3. You can switch the headunit and leave everything else. The sound will be improved dramatically. The Bose speakers are rated at 2ohm, whereas most aftermarket speakers are 4ohm. If you decide to change the speakers, I would suggest you replace the Bose amp.

May 30, 2006 | 12:38 PM

HACK THS

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When I replaced my headunit I needed a line level converter

I actually have my old one since I replaced the whole stereo system. Granted I have the Bose system in the car, not sure if you have the upgraded unit, or what? Once nice thing about putting the aftermarket headunit is that you can then use RCA outputs to the aftermarket amp. The Line Level converter was required when I wanted to replace my stock OEM headunit though.

May 30, 2006 | 01:33 PM

ttuner333

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spoiledTT, thanks for all the help! this really made things alot easier! this forum and great group

of people never ceases to amaze me. thanks again!

May 30, 2006 | 01:38 PM

ttuner333

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thanks, what exactly is a "line level converter" and where can i get one? i have the

bose unit on my 2000 TT, not sure what you mean when u ask which one i have. i have the same car as you though, a 2000 TT180QC...

May 30, 2006 | 01:52 PM

TTschwing

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You don't need it....>

A line level is the standard RCA "Outs" on a new Head unit.. Using the Metra harness and the line level outs of your new head unit into the Bose amp will work fine...