Beovox S75s Slight Tweeter Buzz

[marcham]

Hey, all.

Recently had fun rebuilding a pair of Beovox S75s. Installed new crossover caps from Beoshop, replaced the tweeter diaphragms, and redid the grill cloth. The speakers really sing and sound great! Except…

The tweeters have a slight buzz whenever the amp is on; not noticeable when music is playing. I double checked the coils are the right impedance and tried swapping the wires, but no fix.

If I engage the Main Direct mode on my amp with a 6db drop, the issue goes almost completely away, even at higher volumes, but I’d prefer to keep my tone controls.

Thanks all!

[marcham]

Posting in the crossover schematic. While I redid the caps, everything else is original. As I mentioned, I redid the tweeters with new diaphragms, but I would assume a signal is getting to them that shouldn’t, making it the crossovers.

[Dillen]

The crossover can not introduce a signal. It’s all passive.
All sounds come from the amp.

But it could be, that the diaphragm wasn’t properly centered, so it now rubs on the magnet or center pole piece.

Martin

[Author]

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