So. Had my Boston Acoustics subwoofer for 4 years and it had a terrible coil whine squeal from day one.
I RMA'd it twice, but both times it came back (after a 6-8 weeks return time) and had the exact same problem.
Said they "swapped the amplifier module". As it didnt help, personally I feel more convinced its the PSU module. Company now bankrupt and I cant stand the noise:
Its a high pitch coil whine tone -it's terrible agonizing, when worst, I hear it clearly 4-5 m from the Sub (because sits in corner).
It wines without RCA input. It whines in both active mode and stand by (inactive) mode, though changes a bit in frequency and often gets noticeably higher when in stand by!
It whines if I move it to a completely different room/power source. Whine makes a weird "squeak squeak squeaaiik" and then dies, when power is pulled.
I opened the sub, not being able to exactly pin point the source. I also didnt see any bulged caps, everything looks normal and smells new.
Fun fact; Im pretty sure the sound dropped dramatically for a period when sub was upside down, being opened up.
I have basic knowledge and repair skills like changing dead caps.
Question is: Will I be fine with "drowning" the coils (I see at least 2) with eg. hot glue as a start?
Or what to do? Thanks!!
Diagram (Im pretty sure. Or very similar).
I RMA'd it twice, but both times it came back (after a 6-8 weeks return time) and had the exact same problem.
Said they "swapped the amplifier module". As it didnt help, personally I feel more convinced its the PSU module. Company now bankrupt and I cant stand the noise:
Its a high pitch coil whine tone -it's terrible agonizing, when worst, I hear it clearly 4-5 m from the Sub (because sits in corner).
It wines without RCA input. It whines in both active mode and stand by (inactive) mode, though changes a bit in frequency and often gets noticeably higher when in stand by!
It whines if I move it to a completely different room/power source. Whine makes a weird "squeak squeak squeaaiik" and then dies, when power is pulled.
I opened the sub, not being able to exactly pin point the source. I also didnt see any bulged caps, everything looks normal and smells new.
Fun fact; Im pretty sure the sound dropped dramatically for a period when sub was upside down, being opened up.
I have basic knowledge and repair skills like changing dead caps.
Question is: Will I be fine with "drowning" the coils (I see at least 2) with eg. hot glue as a start?
Or what to do? Thanks!!
Diagram (Im pretty sure. Or very similar).
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