hello everybody,
When I turn off my Luxman L-3, after 5 seconds the woofers get " sucked in ".
DC offset is 0mV on both channels but on turnoff it goes up to 12Volts on both channels. I 've been searching about the subject but the only solution I can find is placing a relay or putting a 1µF cap on the powerswitch. Shouldn't it be possible to solve this whitout changing the amp's design ? I can't imagine the Luxman was meant to suck the woofers in on turnoff.
I've been working on this amp(new transistors and a few caps) so maybe I did something wrong.
I saw the power supply caps discharge at different speed, one in 5 seconds the other in 2 minutes. Is this normal ?
thanks in advance
When I turn off my Luxman L-3, after 5 seconds the woofers get " sucked in ".
DC offset is 0mV on both channels but on turnoff it goes up to 12Volts on both channels. I 've been searching about the subject but the only solution I can find is placing a relay or putting a 1µF cap on the powerswitch. Shouldn't it be possible to solve this whitout changing the amp's design ? I can't imagine the Luxman was meant to suck the woofers in on turnoff.
I've been working on this amp(new transistors and a few caps) so maybe I did something wrong.
I saw the power supply caps discharge at different speed, one in 5 seconds the other in 2 minutes. Is this normal ?
thanks in advance
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Good to hear other L-3's are doing the same thing. Does it to the same thing to the woofers also ?
I'm using it with cheap speakers now but it doesn't look healthy, I'm afraid to use the amp on good speakers. Can 12Volts do any damage ? If it does I think I'll go looking for a relay.
I'm using it with cheap speakers now but it doesn't look healthy, I'm afraid to use the amp on good speakers. Can 12Volts do any damage ? If it does I think I'll go looking for a relay.
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