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    Replace bose amp

    I have an '04 infiniti g35 coupe with the factory bose system. I want to replace the bose amp that sits in the back of the car. The factory HU has plus and minus outputsfor each speaker to this amp that are shielded. This is unusual, because usually speaker level inputs are not shielded. On the other hand, usually when you send a signal to an amp it is not at speaker level. So here are my questions:

    1. Are these leads high level or low level? Where can you get this info?
    2. What adapters are available to bypass this amp to use an aftermarket amp?
    (I am installing an Alpine V12 5 channel amp that has no speaker level inputs.)
    3. Would an LOC work here? Which one would work?
    4. Is there anything else I should be thinking about?







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    Re: Replace bose amp

    If the HU sends signal to the Amp before the Speakers, I'll put money that those are low level inputs. Especially because they are sheilded. You're right when you say it's unusual.. because no one does it like that for speaker level stuff.

    Your going to need to terminate each of the wires from the HU into an RCA end that you can plug into the amplifier. You don't need a LOC because you are dealing with line level, not speaker level.

    You should think about replacing the stock speakers as well. Most of the Bose stuff runs at odd impeadences. Which I'm sure the amp can handle, but why have to deal with Bose anymore?




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    Re: Replace bose amp

    replace it all, even the headunit.




    Headunit: Pioneer AVH-P2300DVD
    Subwoofers: (2)15" RE Audio XXX(05 model)
    Sub Box: Undecided..
    Sub Amp: Crescendo bc3500
    Speakers: 6.5" RE Audio XXX Components(soon to be 2nd pair in kick panels)
    Speaker Amp: Hifonics HFi100.2(for now...)
    Wiring: 2 runs of 1/0 throughout, XS Power battery in trunk,big 3 done, 270a alt, 1/0 accesories throughout
    Deadner: 75sq ft AT 60mil, 20sq ft Alphadamp
    Security: Crimestopper 2way alarm/remote start

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    Re: Replace bose amp

    I agree that the leads are probably low level, but you would usually have a shielded left and right channel. In this case, you have a shielded positive and negative, which is really weird. So I'm not sure how to terminate them with an RCA. I think I would still need some sort of adapter that can combine the positive and negative into an RCA connector. This of course is part of what an LOC does. So it still makes me wonder if the output from the HU is a speaker level output and the Bose amp just accepts speaker level inputs. I only have a wiring diagram for the stereo system, not a schematic which could tell me what type of signal I have; either amplified or not. Maybe I can call Infiniti to find out. I don't know, it's all pretty screwy. The bottom line is that I like the head unit for what it does. I will be adding the amp, a sub, and a modified Xbox to play dvd's and mp3's, just need to lay the ground work here before I begin. Any help with this wiring setup would be appreciated.




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    Re: Replace bose amp

    Anyone else out there want to weigh in on this subject?




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    Re: Replace bose amp

    it's low level to the amps... if i were u i'd replace them all... no need in dealing with faulty headunits speakers or amps after you go tapping into stuff... and the bose speakers are sometimes 1 ohm which i doubt your alpine amp can handle



    Been out of this for a longgg time...

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    Re: Replace bose amp

    Anyone make a wiring harness that connects to the cable that connects to the Bose amp?




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    Re: Replace bose amp

    to replace ur factory bose radio? check soundgate.com



    Been out of this for a longgg time...

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    Re: Replace bose amp

    That radio is imgrained in his dash, he would be in for major customization to take it out. Its really gay, no din slot totally part of the dash.




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    Re: Replace bose amp

    I have gotten information that the leads are indeed low level diferential type leads. I would just like to have some sort of wiring harness pigtail to use to wire up The RCA's.




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    Re: Replace bose amp

    no you dont have to do that.

    get some of these T splicers-

    http://www.tessco.com/products/displ...&subgroupId=24

    you can usually get them at your local hardware store. they just lock onto the wire, cut thru the insulation, and make a convienent quick connect terminal.

    then buy some cheap RCA cables

    http://www.allelectronics.com/cgi-bi...108&type=store

    and cut them in half, and solder the NEGATIVE wire inside (the one that hooked to the outer-shieth end of the cable connector) to the NEGATIVE on the first chanel crimp with the quick connect, and repeat with the posative (little shaft on the end connects to the posative wire inside the RCA) and hook that togehter. now you have half of your front RCA cord made, repeat with channel 2.

    do this to all the channels, run new power\grounds. use another T crimp on the remote lead for the existing amp and remove the amp. hide all the wires, put your amp in place

    and plug-er up.

    thats what im planning on doing with my girlfriends car. gotta replace the bose speakers though

    the cool thing about this way is, no RCA's\rem wires to run, only a single 8guage wire, drop-in amp install, and if you wanna go back to sell the car, just place the amp where it used to be with the old one, and disconnect the quickconnects - and leave the harness how it is. no cutting any wires - leaves all the stock wire intact.

    gotta love it.

    not hard.
    Last edited by req; 01-18-2005 at 03:20 PM.




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    Re: Replace bose amp

    There is only one problem with this. The leads are shielded, which means when you splice into the wire you will be touching both the main conductor and the outer shielding mesh, which will difinitely cause some serious problems, not to mention the severe ground loop. This is why I am trying to find a wiring harness pigtail so I can leave these wires in tact. Anyone heard of such a device.




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    Re: Replace bose amp

    oh thats right

    i thought you meant "shileded" like as in rubber crap.

    well. you could always just cut the wire and solder it... or make your own pigtail thingie...

    can you get a picture of the connector? it shuold be a standardized kind of molex... you might be able to find one at www.allelectronics.com but i cannot be sure. depending on what the harness looks like. get us a picture.




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