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Old 12-02-1999, 08:16 PM
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For any of you that followed my "saga" from having a megacar-inspired 300E ( which included an onboard computer for DVD, GPS, and mp3 playing to my humbled, post break in present, which includes riding in silence while I wait for the rest of my replacement stereo components to arrive, I'd like some advice before I begin my "stealthier, more secure, better sounding" install...

I have a set of A|D|S A series components, which include a 5" woofer and a separate tweeter...they are to be powered by a Rockford Fosgate 250a2 amp...Will the woofer fit in the factory in dash location (currently a 4" RF punch speaker sits there) or would I be better off custom door mounting them or constructing a kick panel? Also, I have two Orion XTR dvc 12" subwoofers coming in and I haven't decided on the best way to mount them (a) more securely than a box sitting in the trunk and (b) to maximize sound quality...I was thinking a suspended enclosure with a 8"x8" or so hole cut in the deck where the first aid kit was. Suggestions? The 12's are to be powered by a RF 360a2 amplifier.

I haven't given up on the on board computer...I recently yanked out the ashtray assembly and began mounting a 4" LCD monitor inside that will be the interface for the onboard'll be a lot less conspicuous than the sitting on the dashboard setup I had before. (any leads to getting some replacement zebrano wood trim components would be appreciated...I don't want to take the dremel cutting wheel to my pieces without having spares)

anyway, i've written a book here, any feedback, advice, or questions will be appreciated.


Chris Singh
1983 300D 200k+ (stopped odometer)
1990 300E 123k
1999 E430 12k
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Old 12-03-1999, 02:50 AM
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Join Date: Apr 1999
Location: Milton Keynes, UK
Posts: 403
Well... what sort of sound are you after? A more bassy sound judging by all the RF kit. I doubt you'll get a 5" midbass in the dash, as theres not a lot of mounting depth there. (You'd have to cut into the air vent piping)You may want to stick with the 4" for this location.

In terms of bass, are you sure you need 2 12s? A good 12 (I use an NHT) mounted in the spare wheel well gives me a flat response to about 10hz, and up to about 135db with no problem. Fine for normal use, tho a little weak for competition. I also lose no bootspace or spare wheel.

Has your 300E got speaker pods on the door or not? If not, you can just get the updated door pockets with speaker cut outs.

Good luck!


Brian Drought
1991 300CE
ICQ: 2180069
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Old 12-04-1999, 03:27 AM
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Join Date: Mar 1999
Location: SF Bay Area, CA
Posts: 57

I'm running Rockford 1405D's in the dash. They call it a 5" speaker but I think it's really 120mm (4.7"). Bdrought is right about the lack of depth so do the math. I thinking of going for more SQ with mb quart 3 ways (6.5, 4, 1). I was looking at mounting the 6.5 in the back of the door panel - there's a wasted box area back there. Didn't know about the door panel swap bdrought - more info would be great (do I have to replace the whole panel or just parts).

Keep us updated.
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Old 12-04-1999, 08:13 AM
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Join Date: Apr 1999
Location: Milton Keynes, UK
Posts: 403
I dont know the part numbers, as I've never seriously looked at doing it (I have a coupe and nothing will fit!!)

I phoned my dealer, but their computer is down so they couldnt give me an answer.

Have a look in PartsShop ;-)


Brian Drought
1991 300CE
ICQ: 2180069
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Old 12-04-1999, 12:16 PM
Michael's Avatar
Join Date: Jul 1999
Location: CT, USA
Posts: 2,699
As regards speaker placement, I've mounted Boston Acoustics 6" woofers in the doors of my '88 300TE. Put them below the door latch...pretty much centered top to bottom on that perforated MBTex part of the door panel (the car has the orig. door panels, so no speaker boxes like my '92 500E). The mounting was VERY tricky...I think there's about 2mm of clearance between the back of the speaker and the window gear mechanism. Great place for speakers, but be very careful.

Best regards, Michael
'92 500E
'88 300TE
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Old 12-18-1999, 10:32 AM
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My information is based on the work I did on my 87 300E, which has 4" MB quart coaxials in the dash and 2 8" JL Audio subs in a small sealed box in the trunk. Powered by a Soundstream REF644 (60W x 4, I think).

First, regardless of whether the speaker's width fits into the dash opening, its not a sealed enclosure. So you're not going to get much bass out of that spot anyway. My 4" coaxials fit pretty well, and I can see how 4.5" by somebody else would have fit too. But a bigger speaker probably would not have given more bass because there isn't a real enclosure Your best bet is to get a larger woofer in the door; if you have the 6" woofer side pocket (if your car is a later model), then MB quart has a three-way kit that will put a woofer there, with my coaxial for your mids/highs in the dash. If your car doesn't have this pocket, you can't simply add the newer pocket without doing some body work to the metal of the door. Sounds like the guy who added the 6" BA woofer to the door knows what he's talking about. Kick panel isn't an option because the emergency brake is there.

All bass comes from the trunk, which I didn't cut to make reselling the car easier. With 120W to each subwoofer(two 4 ohm woofers wired together with 2ohm stable amp)crossed over at 80hz, the bass gets through. It's not very linear, though; at lower volumes less bass gets through. At high volumes (and it get very loud) all the bass gets through.

My system sounds pretty good to me (Nakamichi MB-75 CD changer). let me know if you have any questions.

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