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KLH Bassbite V SubWoofer speaker hummmmmm

 
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ghartman



Joined: 06 Jan 2006
Posts: 3
Location: Rochester, NY
PostPosted: Sat Jul 21, 2007 6:26 pm    Post subject: KLH Bassbite V SubWoofer speaker hummmmmm Reply with quote
I have this sub woofer from a surround sound system and it hums. I'm guessing its the power amp which is a LM1875T and is a 5 pin unit. Are there any bench tests I can run? Other suggestions? The sub woofer is powered by its own 120 VAC input.

Thanks,
Gary
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minnie



Joined: 18 Aug 2005
Posts: 2881
Location: Hell
PostPosted: Sat Jul 21, 2007 8:27 pm    Post subject: Reply with quote
http://store.americanmicrosemiconductor.com/lm1875t.html?gclid=CL2n1OC9uY0CFRUHWAod_iRtMA
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PostPosted: Sun Jul 22, 2007 1:05 pm    Post subject: Re: KLH Bassbite V SubWoofer speaker hummmmmm Reply with quote
ghartman wrote:
I have this sub woofer from a surround sound system and it hums. I'm guessing its the power amp which is a LM1875T and is a 5 pin unit. Are there any bench tests I can run? Other suggestions? The sub woofer is powered by its own 120 VAC input.

Thanks,
Gary

the problem has many possible cause, but commonly, on power supply section of your amp.it may have a leak filter capacitor. or the groundings is not sufficient.
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speaker!
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PostPosted: Sat Jun 04, 2011 9:43 pm    Post subject: how do i fix the humm Reply with quote
how do i fix the hum on the speaker
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PostPosted: Wed Dec 23, 2015 1:12 am    Post subject: Re: how do i fix the humm Reply with quote
speaker! wrote:
how do i fix the hum on the speaker


[/quote]="speaker!"] replace the 2 radial electrolytic capacitors on the power supply board. They are the big ones that are side by side. Mine were 4700 uFD, 25v, 85c.
Quote:
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