galleryvw

I'm thinking of putting in an amplified subwoofer, or an amp with a subwoofer.

What would be wrong with tapping in to the rear speaker wires in the trunk and using a converter to RCA right there (in the trunk). All the installers say they make that conversion behind the head unit - but why? Why use a 17' RCA cable when you could use 1' and have all the connections in the trunk? I'm sure i'm overlooking something - but i'd like to do this myself and keep it cheap.

on the same note - does anyone recommend the bazooka tubes?


thanks,

v

michakaveli

Because that signal is already amplified and too strong for line-level converters to process. I've tried it before and it didn't work

The output off behind the radio is usually only a few volts. Etc, etc, etc...

galleryvw

so on the back of the stock head unit (version with the tape player's door visible) there is an output plug for a sub? I haven't taken mine out. Does anyone have a picture or schematic of the backside of the head unit?

michakaveli

the stock unit has no such thing on the stock radio....

jimmydagreek

Are there actual speaker wires coming out from behind the head unit or is it one cable or something that goes into the amp and then speaker wires come out of there? Thanks Mich...

michakaveli

The wires coming out of the radio are just like any radio having separate +&- FR FL RR RL speakers leads, speed sensing wire, power ground, etc....

The speakers leads go to the amp in the rear left corner of the car, behind the trunk lid spring....

If ya'll need any more details, no hesitation to ask.....

Do a search, I might have posted more details about the radio and installation a while back.....

galleryvw

interesting.. so the amp is in the trunk, and I would intercept the speaker wires before the go into the amp for my speaker wire to RCA conversion? Or maybe the amp has an output for a sub. I didn't realize there was an additional amp beyond the head unit in the car. Guess i have a bit of learnin' to do about my car.

I guess the bottom line is, can you install an amp without popping the head unit. And, actually, could the stock amplifier drive an aftermarket sub added to the mix?

thanks for all the help - this is pretty new to me

v

galleryvw

i found this on a search for the amplifier, and any wiring diagrams. is this what the stock amp looks like?

http://store.yahoo.com/walters-store/merbenbosam1.html


the connection looks like i runs a computer or something!

michakaveli

You could grab the wires going into the amp for the RCA conversion, at the trunk. It's easier to just convert it at the radio though. Getting to the amp and it's wiring is a pain. In addition the stock subs don't have an independent control. They are tied into the rear speakers or something in the rear for their signal. An aftermarket radio with sub controls will yield much better sound from th remaining interior speakers and independent sub control for the separate subwoofer amp. I would recommend a Pioneer or Alpine unit at the least. Depending on how far you want to mod the audio system. The E-class is a rather easy vehicle to work on the audio system. The battery is under the seat so power distribution to the new amp(s) is taken care of. And both sides behind the rear seat are small square openings blocked by foam which can be used to run all audio cables through safely....

I found that by just replacing the head unit with a good quality one made the Bose system, truely sound like a Bose.....

Lightman

lol, even though the speakers are not in fact made by bose, mercedes just paid to license the name...

clkal

About the bazooka tubes....... those are designed to work best in cars that are hatchbacks. With trunks, most of the "fake" bass they produce will be muffled by the back seats, and steel plate of the trunk.

clkal

About the bazooka tubes....... those are designed to work best in cars that are hatchbacks. With trunks, most of the "fake" bass they produce will be muffled by the back seats, and steel plate of the trunk.

jago1244

i do see the 'wink' attached to your post, but i have to ask, is this true?? the 'bose' product in our w210s is actually not? is this why it sounds like such crap? my wife's acura bose is so much better, even my former w202 was superior.

galleryvw

i think my system sounds pretty good, but would be much better with an active tweeter at ear level. i can't beleive those grills by the side mirror and dash are conceiling nothing (until I put my ear up to them and heard nothing coming out.) i'd also like some deeper bass - thus the start of this post. sounds like bazooka tubes aren't getting rave reviews around here. I'd just like an inexpensive solution to adding bass - seeing how i've got an appointment on monday to replace the lower control arm bushings and the ball joints. and now i have a mysterious power steering leak to deal with.

this car is getting exbenzive