What speakers can replace Bose rear deck? - Mercedes-Benz Forum
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post #1 of 13 (permalink) Old 04-26-2019, 08:54 PM Thread Starter
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What speakers can replace Bose rear deck?

I have a 94 C280 with the Bose system but the head unit was replaced with a Sony one. The rear deck speakers were rotted out when I bought the car. I can't seem to find any replacements. I searched for the individual stock ones with no luck. Crutchfield had nothing to replace them. Any ideas what will work? It would be nice to hear some bass when I play music.

Thanks in advance!
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post #2 of 13 (permalink) Old 04-30-2019, 09:35 PM
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Since your goal is to hear some bass, I wouldn't even bother trying to replace the Bose speakers. And unfortunately you'll have a hard time finding replacement Bose speakers for this car anyway.

That being said, several years ago I had an audio shop install a new head unit in my 1994 C280 and afterwards my car didn't have any bass. After some poking around I discovered they cut my audio wiring harness behind the head unit as well as at the Bose amp, and ran the speaker level outputs from the head unit into the Bose speakers. Problem is that the Bose speakers have a different impedance than standard speakers, and Bose tunes their speakers to match the rest of their system, so the non-Bose head unit connected directly to the Bose speakers ended up not having any bass. I wonder if the same happened to you. The solution is to feed line level with a line level converter from the head unit to the Bose amp and then let the Bose amp drive the Bose speakers.

Otherwise, take it to a reputable audio shop and have them install a new set of speakers, amp, and sub. They'll need to re-wire it too, but it'll sound way better.

Good luck!
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post #3 of 13 (permalink) Old 05-01-2019, 06:48 PM
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I beg to differ from n0alpha's assessment. There are no reputable stereo shops, they all suck. If you want to do something right, you should do it yourself.

Since you have the bose system, any upgrade would indeed be more complex. It would be possible to remove the bose amp, temporarily keep the bose speakers (although eventually you;d want to change them) and instead wire in a custom amplifier that can drive all the speakers + a subwoofer channel.

In my car I've replaced the hat shelf speakers with EarthQuake Sound SWS 6.5" subwoofers driven by a 300w Kicker amplifier. The bass is quite nice, roughly on par with a single 8" subwoofer, yet I don't loose any trunk space hauling around a giant subwoofer box.

Of course, find some wiring diagrams and study them. Take your time, research your parts, and slowly build a perfect system for what you are looking for. It will take time but you probably will be able to split it up into stages to make the amount of work more manageable. Installing my subwoofers + amplifier took me easily 24 hours worth of work. That's not counting replacing the heat unit, dash tweeters and door speakers (which is probably also another 24).
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post #4 of 13 (permalink) Old 05-01-2019, 11:07 PM
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This may not be related to the topic but I hope you'll allow me to ask. My current deck is Blaupunkt but it does not function properly already that I am deciding to replace it. Can I just remove the stereo and leave the slot empty without disturbing any electrical function of the car? What is the size of the front and rear door speakers?
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post #5 of 13 (permalink) Old 05-03-2019, 05:24 AM
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I am also contemplating the kicker 6.5" woofers along with 6.5" mid-rangers or full-rangers.
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post #6 of 13 (permalink) Old 05-04-2019, 07:19 AM
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I don't know if the 6.5" kickers will fit into the hat shelf. The Earthquakes are specifically designed to fit into crammed places. There's a dude on eBay that sells the plastic pods the speakers go in. I bought them for the doors and the hatshelf. They are much better quality than the factory ones, so they will support the speaker much better.

Also for the doors I recommend getting co-axial speakers, pure mid-range drivers won't sound all that great because there is essentially nothing but the dash tweeters to fill the rest of the sound in. If you had the W140 with it's dual front speakers, then you could go for a dedicated mid-range driver, but not on the W202.
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post #7 of 13 (permalink) Old 05-04-2019, 09:40 AM
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You're pretty much describing what I am intending to do. Except I'll be fitting 4 speakers in the rear deck using those pods you speak of.
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post #8 of 13 (permalink) Old 05-06-2019, 04:24 PM
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I am intending in the future to add a full range amp to my car (which would also drive the subs) and also add 2 more full range speakers in the hat shelf.
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post #9 of 13 (permalink) Old 05-13-2019, 06:32 PM Thread Starter
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Thanks for the responses! The transmission started slipping so I'm not sure how long I'll be keeping the car now. I had replaced the fluid and filter but I guess the trans was already on its way out.
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post #10 of 13 (permalink) Old 05-20-2019, 11:40 AM
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Ugh, just spent 2 hours in the garage rewiring the speakers in my w202. The second replacement Bose amp died, and I couldn't find a wiring diagram so I cut out the rear amp harness and bridged the head unit directly to the speakers.

With no wiring diagram I had to test the outputs and inputs one by one. I bridged the rear fill bass to the left rear channel, but no dice, I can hear some audio, but clearly the head unit doesn't put out enough power to drive the bass.

I guess I'm going to change it out with an aftermarket amp and speaker. I love the sound of the stock Bose system but I'm so tired of these old electronics.

eddie aka drakon

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