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Audio and Video Talk
The Vintage Audio Section
Amplifier pop
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<blockquote data-quote="MusicMan_ZA" data-source="post: 830022" data-attributes="member: 14924"><p>Dear Vintage Fundis,</p><p></p><p>I have a Sony TA-1055 amp (looks good and sounds great) that, when I switch it on, makes a loud "click" on the speakers, and when I switch it off, a very loud "pop" sound on the speakers.</p><p></p><p>This happens even with volume set to zero.</p><p></p><p>I have done some reading, and have measured the DC mV at the speaker terminals with volume at zero and AUX selected as source:</p><p>L = 12mV DC and R=14mV DC.</p><p></p><p>This was on the "B" speaker terminals, as my speakers were connected to the "A" terminals.</p><p></p><p>I have also fitted a 270V 0.47uF "spark suppression" capacitor across the 239V AC Live and Neutral cables coming from the the mains where they connect to the On/Off switch - this made no difference? Do I leave it, or remove it? </p><p></p><p>Any idea why this is happening, and advice on how to sort this out?</p><p></p><p>Thanks,</p><p>Johan</p></blockquote><p></p>
[QUOTE="MusicMan_ZA, post: 830022, member: 14924"] Dear Vintage Fundis, I have a Sony TA-1055 amp (looks good and sounds great) that, when I switch it on, makes a loud "click" on the speakers, and when I switch it off, a very loud "pop" sound on the speakers. This happens even with volume set to zero. I have done some reading, and have measured the DC mV at the speaker terminals with volume at zero and AUX selected as source: L = 12mV DC and R=14mV DC. This was on the "B" speaker terminals, as my speakers were connected to the "A" terminals. I have also fitted a 270V 0.47uF "spark suppression" capacitor across the 239V AC Live and Neutral cables coming from the the mains where they connect to the On/Off switch - this made no difference? Do I leave it, or remove it? Any idea why this is happening, and advice on how to sort this out? Thanks, Johan [/QUOTE]
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Audio and Video Talk
The Vintage Audio Section
Amplifier pop
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