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STA+960 buzz at higher volume

Dorkelstein

Dorkelstein

Super Member
Hi everyone. I have a Realistic STA-960 that has a buzz in both channels . It starts around 2;00 and gets progressively louder. No difference on any function or with/without a source. I would rarely play it that loud but I'm worried it could be the harbinger of something worse. Thanks in advance, The Dork
 
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If the volume control was left at zero for about 10 minutes and then it starts to buzz, I would suspect the power supply electrolytics are going bad and need to be changed.
 
cademan said:
If the volume control was left at zero for about 10 minutes and then it starts to buzz, I would suspect the power supply electrolytics are going bad and need to be changed.
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I'll try that but it's more like a buzz than a low hum . It was serviced in 2007 but that doesn't mean they were charged or even still good.
 
I measured DC offset and it's like 20mV on the right and 18mV on the right. I played it for about 6 hours today and when I shut it off I heard the adreaded thump-bump. Are those readings high enough to damage my speakers?
 
cademan said:
Those types of stereos and amplifiers have been around forever and I have not heard of any damage to speakers. Its usually the "turn on" transients that can be potentially harmfull.
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Thanks. The woofers do jump in and out when it happens andy speakers are pretty rare so I like to be cautious. Thank you for all the info. The Dork
 
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