If you tap on the amp’s tubes, does it send an impulse thru the speakers?@birdfan You didn't answer his question! To get feedback due to microphonics the tubes would have to be pretty bad. Just tap on them as cleeds asked- you'll find which are bad easily enough!
Microphonic feedback?
Hi All
I am hoping you can help. I am running a tube integrated and a subwoofer amplifier to drive the second voice coil of my Gallo reference 3.1s. In this configuration when I turn up the volume of the subwoofer amplifier enough to activate the second voice coil/subwoofer I get a terrible bass feedback which quickly overwhelms the speaker and room. This does not happen when using solid state amplifiers. I think it might be tube microphonics ??.
Any help or guidance would be most welcome.
Thanks in advance
birdfan
I am hoping you can help. I am running a tube integrated and a subwoofer amplifier to drive the second voice coil of my Gallo reference 3.1s. In this configuration when I turn up the volume of the subwoofer amplifier enough to activate the second voice coil/subwoofer I get a terrible bass feedback which quickly overwhelms the speaker and room. This does not happen when using solid state amplifiers. I think it might be tube microphonics ??.
Any help or guidance would be most welcome.
Thanks in advance
birdfan