I'm having problems with my subwoofer built with a bridged OPA549 and a LM833 for crosoover.
It's part of a 2.1 system rebuilt using a broken set of z-680 speakers. Ever since adding the LM3886 chips for the satellite speakers, I've been noticing the output from it a constant static sound that sounds like the input but with static in the sub, but it is only audible at lower volumes.
Is this just a sign my 100W transformers are crapping out with the load (like the other problem I have where the thing runs out of power and the 3886s start making some odd popping sound that goes away once the amp starts clipping), but I don't see how the power of a transformer would cause this odd static.
Thanks!
It's part of a 2.1 system rebuilt using a broken set of z-680 speakers. Ever since adding the LM3886 chips for the satellite speakers, I've been noticing the output from it a constant static sound that sounds like the input but with static in the sub, but it is only audible at lower volumes.
Is this just a sign my 100W transformers are crapping out with the load (like the other problem I have where the thing runs out of power and the 3886s start making some odd popping sound that goes away once the amp starts clipping), but I don't see how the power of a transformer would cause this odd static.
Thanks!
Nobody has any ideas?
I can make a recording of the sound with my microphone tomorrow if it will help
I can make a recording of the sound with my microphone tomorrow if it will help
Thanks!
You were right, it was a component problem. One of the 0.1uf caps on the crossover PCB had lost a solid connection, so it would barely make contact and cause the sound, or not make contact at all and cause even more static.
It's 9:30 here
You were right, it was a component problem. One of the 0.1uf caps on the crossover PCB had lost a solid connection, so it would barely make contact and cause the sound, or not make contact at all and cause even more static.
It's 9:30 here
Thanks!
You were right, it was a component problem. One of the 0.1uf caps on the crossover PCB had lost a solid connection, so it would barely make contact and cause the sound, or not make contact at all and cause even more static.
It's 9:30 here now, so I will try re-soldering that part tomorrow. Hopefully it will work!
Thanks again,
Mike
You were right, it was a component problem. One of the 0.1uf caps on the crossover PCB had lost a solid connection, so it would barely make contact and cause the sound, or not make contact at all and cause even more static.
It's 9:30 here now, so I will try re-soldering that part tomorrow. Hopefully it will work!
Thanks again,
Mike
That was it! thanks! Now it works perfectly,and, somehow, even the problem with the popping sound in the 3886s are gone.
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