Amplifier: Where can I run cable thru firewall?
Thread Starter
Member
Joined: Jun 2002
Posts: 237
Likes: 3
From: Charleston, SC
99 ML 320, 97 Porsche 993 C2S, 92 300E
Amplifier: Where can I run cable thru firewall?
1992 300E.
I want to run a power cable direct from the battery to the amp.
Where is a good place to run wire thru firewall? Somewhere with an existing grommet.
I want to run a power cable direct from the battery to the amp.
Where is a good place to run wire thru firewall? Somewhere with an existing grommet.
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Joined: Dec 2002
Posts: 882
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From: Sherman Oaks
2004 C240, 2015 GL350 Bluetec
behind the battery is a plastic panel, remove that and you will see the grommet. punch a hole int he grommet, run the wire in, and fish it down. then run it downt he passenger side and into the trunk.
You will need to remove at least the bottom seat custion, but may have to remove the backrest too to get it in the trunk.
Runt he biggest cable you can, at least 4 guage, but thicker is always better. 2 or 0 gauge. The longer the cable the thicker the gauge should be.
If you plan on adding more amps then run thicker than 4 gauge.
I have 4 gauge right now powering 2 amps and a 2 farad capacitor. I'm going to do a dual battery system soon, so I plan on running 0 gauge to the trunk mounted battery and then run 4 gauge tot he amps from that battery.
Just gotta get the battery isolator or combiner to do it and the 0 gauge cable. It is just not the top thing on my list of projects I want to do.
AshMan
You will need to remove at least the bottom seat custion, but may have to remove the backrest too to get it in the trunk.
Runt he biggest cable you can, at least 4 guage, but thicker is always better. 2 or 0 gauge. The longer the cable the thicker the gauge should be.
If you plan on adding more amps then run thicker than 4 gauge.
I have 4 gauge right now powering 2 amps and a 2 farad capacitor. I'm going to do a dual battery system soon, so I plan on running 0 gauge to the trunk mounted battery and then run 4 gauge tot he amps from that battery.
Just gotta get the battery isolator or combiner to do it and the 0 gauge cable. It is just not the top thing on my list of projects I want to do.
AshMan
Member
Joined: Nov 2004
Posts: 151
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From: Portsmouth Ohio
E 320
True about the back seat. The seat has to come apart and then there is a place to run the wire on the Driver Side left shoulder behind the back of the seat and it will run right where you need it.
Brian
Brian
Thread Starter
Member
Joined: Jun 2002
Posts: 237
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From: Charleston, SC
99 ML 320, 97 Porsche 993 C2S, 92 300E
Thanks to all for your responses.
I ran all the wires down the center tunnel under the console except the power wire which I ran down the passenger side. I wanted to keep it away from the other wires to prevent the possiblity of interference. There is a conveniently located grommet right behind the battery.
Below are a couple of photos of the wiring in the trunk before it was connected to the amp. I tapped into the 12 pole connectors on the two small stock amps so I did not have to run new speaker wire.
The amp has 40 watts RMS per channel at 2 ohms times 4 channels and it works well. I took it out of my 420 SEL before I sold it 6 years ago so the tuner and amp were just sitting around waiting to be used.
I ran all the wires down the center tunnel under the console except the power wire which I ran down the passenger side. I wanted to keep it away from the other wires to prevent the possiblity of interference. There is a conveniently located grommet right behind the battery.
Below are a couple of photos of the wiring in the trunk before it was connected to the amp. I tapped into the 12 pole connectors on the two small stock amps so I did not have to run new speaker wire.
The amp has 40 watts RMS per channel at 2 ohms times 4 channels and it works well. I took it out of my 420 SEL before I sold it 6 years ago so the tuner and amp were just sitting around waiting to be used.
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Joined: May 2003
Posts: 560
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From: Walnut, CA
MB 1990 300E
haha looks like somebody beat me to it.....and yeah my DIY is kind of crappy, i dont exactly feel like taking all the pieces apart since i just put them back....=P but heres the best i can do...
first pop open the hood - then open it vertically by pushing the button on the drivers side then passengers
then take this plastic piece out, comes out easy
you will be able to see a hole where you can then run your power cables
first pop open the hood - then open it vertically by pushing the button on the drivers side then passengers
then take this plastic piece out, comes out easy
you will be able to see a hole where you can then run your power cables
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Joined: May 2003
Posts: 560
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From: Walnut, CA
MB 1990 300E
the wire will come out through here
then take out the carpet on the passenger side
now you dont have to take this part out unless you are doing your headunit as well (only partial instructions)
okay back to running the power cable
unscrew these 2 and just loosen it to give enough room to slide the cable through and under the carpet
then take out the carpet on the passenger side
now you dont have to take this part out unless you are doing your headunit as well (only partial instructions)
okay back to running the power cable
unscrew these 2 and just loosen it to give enough room to slide the cable through and under the carpet
Super Member
Joined: May 2003
Posts: 560
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From: Walnut, CA
MB 1990 300E
passenger side power cable will come out in the trunk
drivers side for the RCA cables
where i put the ground - put it behind the brace because the screw isn't big enough to hold the cable in place
HOPEFULLY that helped...LOL
drivers side for the RCA cables
where i put the ground - put it behind the brace because the screw isn't big enough to hold the cable in place
HOPEFULLY that helped...LOL
Thread Starter
Member
Joined: Jun 2002
Posts: 237
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From: Charleston, SC
99 ML 320, 97 Porsche 993 C2S, 92 300E
One my installation I did not replace any speakers, just tapped into the two 12 pole connectors so I could use existing speakers. I had the amp and tuner laying around so I used them. I did not want to send any money on a radio for this car so being able to use parts I had sitting around was good.
I'm sure the sound I have now will not compare to the systems of the folks who have replaced speakers. The sound I have is far superior than the stock system ever was. The new system also has a CD player and a balance and fader that actually work and a quite powerful distortion free amp.
I'm sure the sound I have now will not compare to the systems of the folks who have replaced speakers. The sound I have is far superior than the stock system ever was. The new system also has a CD player and a balance and fader that actually work and a quite powerful distortion free amp.
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Mercedes-Benz w124
wow that is an amazing write up!!! how much did that box and sub cost you? did you make the box yourself? if the car is someday mine, would you like to help me do that? i don't like the stereo guys by here...
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Joined: May 2003
Posts: 560
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From: Walnut, CA
MB 1990 300E
haha thanks! I would be more than happy to help you wire the cables through your car. I would also recommend you buy a aftermarket headunit too. Yeah, I know im going to get bashed for this, but I bought my subs off propertyroom.com its a police auction site like ebay for 70 bucks, but just FYI get a sealed box not ported (ie. holes like mine) because it just echos more and isn't as clean sounding. Well just let me know whenever if you want to get this done over the summer.
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Joined: Mar 2002
Posts: 826
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From: Southeast PA
2010 VW Golf TDI
Nice Job
I'm not planning to work on my stereo just yet, although I am envious of you guys with new awesome systems. I am just posting to say that it is great that people take so much of their time to help each other with what they have learned about their cars. These forums are great, when they are populated by genuinely helpful individuals.
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Mercedes-Benz w124
http://www.propertyroom.com/cgi-bin/...aunbr=60936815
that is the enclosure that you have right? ill try to find a non ported one... but how many subs did you put in there??? it doesn't come with any correct?? and lastly, how much did your woofer cost?? i really liked yours. but im not looking for it to be as powerful as yours. im a fan of bass, not an audiophile
that is the enclosure that you have right? ill try to find a non ported one... but how many subs did you put in there??? it doesn't come with any correct?? and lastly, how much did your woofer cost?? i really liked yours. but im not looking for it to be as powerful as yours. im a fan of bass, not an audiophile
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From: Long Beach, Ca
lots of cars
HEY X03 do you want to make that install look clean??? I got this guy who cuts wood panels and makes boxes for cheap. The only thing you gotta do is to upholster them so i'll help you with that too!! look at my post in the other forum...
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Joined: May 2003
Posts: 560
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From: Walnut, CA
MB 1990 300E
i bought the 2 Kenwood 12"s with the box and everything included. all i needed were the wires and the amp. The only thing I dont really recommend is the fact that they sometimes dont list what the model number of the subs are. Because you really dont want to go in there and buy a potentially POS sub and then get screwed over. When you said you liked how mine looked, was it just because of the box? because if you want it ill just sell it to you for like $1 after i get another enclosed one and then you can just find a couple of 12's and you'll be having a headache in no time
btw, ynvdizw124 can you give me the link to the other forum? because if he has some boxes for cheap then let me know
btw, ynvdizw124 can you give me the link to the other forum? because if he has some boxes for cheap then let me know
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From: Long Beach, Ca
lots of cars
This guy is cheap because he makes pine furniture for my dads store and he's going to hook me up with the boxes. Im going to do dynamat my whole trunk this weekend and by next week i'll be making templates of the wood that is going to be cut. Look at the other forums for my contact info or e-mail me.
Since i saw the sounds systems at the meet next meet we should have a sound off!! By that time i'll finish my system and this time i won't bring the wife so it's gonna be all business here!!
Since i saw the sounds systems at the meet next meet we should have a sound off!! By that time i'll finish my system and this time i won't bring the wife so it's gonna be all business here!!
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From: Orange County, CA
W124's
Originally Posted by YNVDIZW124
This guy is cheap because he makes pine furniture for my dads store and he's going to hook me up with the boxes. Im going to do dynamat my whole trunk this weekend and by next week i'll be making templates of the wood that is going to be cut. Look at the other forums for my contact info or e-mail me.
Since i saw the sounds systems at the meet next meet we should have a sound off!! By that time i'll finish my system and this time i won't bring the wife so it's gonna be all business here!!
Since i saw the sounds systems at the meet next meet we should have a sound off!! By that time i'll finish my system and this time i won't bring the wife so it's gonna be all business here!!
