Join Date: Jan 2018
Location: Rezzago, Italy
Vehicle: 1996 SLK 200 aut.
Other Toys: Autobianchi Y10 (23), Lancia Dedra (1), VW Golf MK4 (1), Alfa Spider 1750 '71, Alfa GTV '80
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810 Bose Sound system: some works to be done
Now it's time to fix something in the car interior: my Bose had only four loudspeakers working, with the midbass driver in the door mute.
First of all, I removed the radio and replaced the central fascia with a better one (I must admit it's not Bose-specific, but it's an improvement), repaired the ashtray mechanism (some silicon grease was enough) and replaced some missing screws. Then I checked radio connections: everything was OK, only minor mess had been done by former owners.
So, I removed the door panels (meanwhile fixing something with a bi-component adhesive) to check if the wiring had been altered - if it hadn't been so, I should have checked the amp and the loudspeakers. Wow, no wiring damaged: it was a luck, because I've always thought of wire-checking as a real pain in the neck.
At last, I realized the amp was OK and it was a loudspeaker failure. The key issue is that Bose systems rely on 2 ohms loudspeakers: IMHO the quality of the loudspeakers themselves is too low in comparison with their price. Yet, I wanted to keep the system instead of installing aftermarket items (working at 4 ohms).
I have some cars and a lot of spares: the idea is to replace the midwoofers (to be fair, they are full-range) with the most similar ones - coming from a Bose system - in terms of size. You can see my solution: I'm gonna use a 2 ohm couple of midwoofers coming from a Lancia Lybra Bose system, which has a standard 165 mm size, and an adapter instead of the specific MB item. For sure, you can use a lot of standard 165 mm components coming from Bose instead of it. Gonna post some more pics as soon as I get the adapters (there are a lot of them on sale from Ebay).
The final price for that fix is under USD 30 instead of 300 - which is what I was asked for from a MB dealer; the sound quality is almost equal to the 810 Bose Sound system coming with the car.
Have a nice day,