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In Reply to: RE: Why do subwoofers thump when turning on power amp? posted by tketcham on April 11, 2017 at 09:17:51
I have a HT sub that thumps on turnoff. But it's been doing that for over 10 years so I gave up being concerned about it.
I'm not all that concerned, it's more of an annoyance, but was wanting to know why it might be happening.
Why turn it off? I leave my Rythmik Servo Subs turned on continuously. I leave my Parasound A21 power amplifier turned on continuously, too. My preamp has tubes so I turn it on and off, but it is totally silent---no thumps or pops at all.
Does your power amp go into standby mode until it gets triggered or stay fully on?
There doesn't seem to be any consensus on whether or not to leave a ss power amp on continuously. I guess I could just turn the power amp fully off each time since that's what I do with the preamp and I have to let it warm up anyway.
My Parasound A21 has an auto on-off function that can be triggered by music or by a 12-volt trigger. However, I have simply been leaving it turned on continuously for the past two or three years. It's a class A/B amp and barely gets warm without music playing. We'll see how long it lasts but it's been doing fine so far. ;-)
Same here except no tubes in my pre.
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