Anyone? Factory Amp mod for Pre Out.
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Junior Member
Joined: Feb 2007
Posts: 36
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From: So Cal
CLS55, E55 AMG
Anyone? Factory Amp mod for Pre Out.
Anyone know how to mod the inside of our factory amp in our cars to extract a pre amp signal. I'm thinking since our systems use MOST runing fiber optic from the deck to the amp and within the amp take the digital signal convert it though a DAC (Digital to Analog Converter), we should be able to get a pre amp signal right after the amp's internal DAC.
Sounds simple, right?
Anyone have knowlege in this area and think its possible?
I have a 03 E55 AMG W211.
Sounds simple, right?
Anyone have knowlege in this area and think its possible?
I have a 03 E55 AMG W211.
Thread Starter
Junior Member
Joined: Feb 2007
Posts: 36
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From: So Cal
CLS55, E55 AMG
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From: orlando, florida. Dr.Phillips, UCF
04 CLK 500, 07 GSX-R 750, S 550, 09 Jeep GC
are u serious? taking apart the factory amp?
i'm guessing you need a (low-level) audio source for a aftermarket amp, maybe subs?
if that's the case just use a RCA line converter.
that is what i have in my w209 clk500. with 2 10's @ 800 watts RMS each.
I did all the work myself, so just ask if u need anymore info.
i'm guessing you need a (low-level) audio source for a aftermarket amp, maybe subs?
if that's the case just use a RCA line converter.
that is what i have in my w209 clk500. with 2 10's @ 800 watts RMS each.
I did all the work myself, so just ask if u need anymore info.
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Joined: Apr 2007
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From: Cleveland Ohio
beater with a heater
are u serious? taking apart the factory amp?
i'm guessing you need a (low-level) audio source for a aftermarket amp, maybe subs?
if that's the case just use a RCA line converter.
that is what i have in my w209 clk500. with 2 10's @ 800 watts RMS each.
I did all the work myself, so just ask if u need anymore info.
i'm guessing you need a (low-level) audio source for a aftermarket amp, maybe subs?
if that's the case just use a RCA line converter.
that is what i have in my w209 clk500. with 2 10's @ 800 watts RMS each.
I did all the work myself, so just ask if u need anymore info.
Let me explain, getting a low level signal that is not already screwed up by the internal EQ features of the amp compensating for crappy speakers and bad speaker placement is hard. mod'ing the amp won't do much, I have already tried that, it stays in the digital realm until it hits the output stage which goes to the vehicles speakers. throwing a high level to low level converter is not the way. you still have signal loss with them which is inherent with the transformer based LOC's and the ones that just toss resistors in line are a joke and will fail. And when they fail they usually take something with it, be it an amp or the headunit.
There are summing networks from JL Audio that can sum the high level signals together and with a tuning CD can pretty much adjust the signal back to a flat unaltered usable signal. however once you tune it to a certain volume on the factory audio, it is for that level. you will need to use their volume knob for volume adjustments. so when you turn the vehicle off or turn the volume down on the factory radio, it will need to be reset for the new curve.
If it is just for subs and you are not really looking for sound quality then a simple way would be the LOC.
Thread Starter
Junior Member
Joined: Feb 2007
Posts: 36
Likes: 0
From: So Cal
CLS55, E55 AMG
are u serious? taking apart the factory amp?
i'm guessing you need a (low-level) audio source for a aftermarket amp, maybe subs?
if that's the case just use a RCA line converter.
that is what i have in my w209 clk500. with 2 10's @ 800 watts RMS each.
I did all the work myself, so just ask if u need anymore info.
i'm guessing you need a (low-level) audio source for a aftermarket amp, maybe subs?
if that's the case just use a RCA line converter.
that is what i have in my w209 clk500. with 2 10's @ 800 watts RMS each.
I did all the work myself, so just ask if u need anymore info.
My goal is to get a good quality analog signal for my amp, and keep it simple and everything working like normal and be done with it, no additional volume knobs to deal with. I've looked into the JL unit you're talking about but the idea of going from line level to a preout just seems so so. To me it's like starting with a MP3 and making it go to back WAV and saying this is as good as it sounds originally in WAV form.
Last edited by h0an9; Mar 17, 2008 at 05:40 PM.
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Joined: Dec 2007
Posts: 3,056
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From: Orlando, Florida
E350 Sport/ML350RWD
Hey J- any chance what you're working on will work with a w204 with standard audio system? Or do you have another suggestion? I said I wasn't installing on this car but I already replaced the stock tweeters (MB Quart Q25) and I just can't stop.
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From: London, GB
RHD C200 Sport Coupe, RHD SLK-55, LHD SLK-350
hmmmmm
I'm assuming you are still looking at the holy grail of building a MOST interface "pre-amp" out unit? Either the market is a hell of a lot smaller than I would expect, or this is a lot harder than it looks on paper.... I've seen companies announcing this type of product since 2005, and yet to see one make it to market. If I remember correctly, your name was associated with one of the first one I saw - directed electronics or something like that in CA?
