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    528hz's Avatar
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    Help me with Pre-Amp usage.

    O.k., I've been trying to figure this out for a while, but maybe I've been looking in the wrong place. Anyhow, here goes:

    So I have a Mercedes with the factory Bose highs mids, and AMP. Now the amp is not RCA powered from the HU, but rather runs through a wiring harness. I want to run a pre-amp HU, or at least turn the internal amp off of HU for better sound quality.

    So I guess my question is, does the factory amp have to have RCA inputs in order for everything to work through HU with the internal amp turned off? Is there a way I can make it work without changing the amp out?

    Converter maybe to RCAs?







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    Re: Help me with Pre-Amp usage.

    Can anyone answer this question.




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    Re: Help me with Pre-Amp usage.

    I'm not quite sure what your trying to do. Could you please clarify? Are you trying to add a aftermarket amp for your mids and highs? Your stock head unit most likely does not have an rca output. If you want to disengage the factory amp then all you have to do is find the amp turn on lead from the back of the radio and disconnect it.




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    Re: Help me with Pre-Amp usage.

    Quote Originally Posted by 528hz View Post
    So I guess my question is, does the factory amp have to have RCA inputs in order for everything to work through HU with the internal amp turned off? Is there a way I can make it work without changing the amp out?

    Converter maybe to RCAs?

    That is the question.




  5. #5
    andrewmoore13's Avatar
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    Re: Help me with Pre-Amp usage.

    You want a new HU and want to use the factory amp?



    HU: Alpine iVA-w505
    Processor: Alpine PXA-H701
    Front Doors: Shok Comps
    AMP Speakers: Diamond Audio D7104
    AMP Subs: American Bass VFL 150.1 gold
    Subs: 2 Custom Sundown Z12s. Dual 2
    Kicker 1/0 wire (soon to be Shok 1/0)
    Stinger SPV44 and a XS Power 5100

    refs: http://www.caraudio.com/forum/showthread.php?p=5007514#post5007514

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    Re: Help me with Pre-Amp usage.

    Quote Originally Posted by andrewmoore13 View Post
    You want a new HU and want to use the factory amp?
    Correct. The factory Bose amp is NOT RCA connected to the HU, it is through wires in the wiring harness.




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    Re: Help me with Pre-Amp usage.

    whenever you get a new hu just grab a wiring harness that will incoporate the factory amp. it will be more expensive then a normal wiring harness but its what you got to do



    HU - Pioneer 800prs
    Mids - Peerless HDS nomex 6.5's
    Highs - Seas Prestige Alumi-domes
    Front Stage Amp - Sundown 100.4D
    Sub - SA-12
    Sub Amp - Saz-1000D
    Wire - Knukonceptz, Kicker Hyperflex

    Blackbonnie References/Feedback

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    Re: Help me with Pre-Amp usage.

    You need to incorporate the rcas or a high low converter because the oem amps needs a low level signal.






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    528hz's Avatar
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    Re: Help me with Pre-Amp usage.

    Quote Originally Posted by nismos14 View Post
    You need to incorporate the rcas or a high low converter because the oem amps needs a low level signal.

    Exactly what I was thinking, Sir. Use a converter to convert the power, ground and remote from the amp, then run RCAs from the converter to the deck. That sound right?




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    Re: Help me with Pre-Amp usage.

    Quote Originally Posted by 528hz View Post
    Exactly what I was thinking, Sir. Use a converter to convert the power, ground and remote from the amp, then run RCAs from the converter to the deck. That sound right?
    I'm not sure what you mean - a converter to convert power ground and remote from the amp??? Why?? You seem to be making this all too complicated. You have all your wiring there behind the headunit. Run power/ground/rca to the amp from batter/chassis/converter? and remote turn on from a switched 12v.






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    Re: Help me with Pre-Amp usage.

    No dude. The power, remote and ground from the BOSE amp to the converter, then from the converter to the RCAs on the HU.




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    Re: Help me with Pre-Amp usage.

    The factory Bose amp has no 12v hook up, it's straight to the deck, not battery. It just takes the signal from the deck to power it.




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