Changing effects while amp is on...

[Wendigo]

Can disconnecting the effects in the fx lop damage the amp if it's on and not on standby? My student has been doing this with a Thunder 30 and I'm worried about his fx driver (12at7). I guess it wont harm the output stage in that the speaker load is still connected.

[Jondog]

Shouldn't. It should be no different than changing channels. Pretty much just closing one circuit path to another.

[Invin]

I wondered about that too with my TH30. I always put it in standby when I was rearranging my pedals. I figured for the extra couple seconds it takes to go flip the switch it's worth the peace of mind.

[OrangePaul]

I don't think there's anything to overly worry about. Maybe you could momentarily short the signal tip of the jack to ground while removing but I can't see that doing much...in fact I don't think i can see much at all right now...

[Neiloler]

If it's making a pop noise and the speaker is barely rated for the 30 watts, maybe, but other than that "perfect storm" scenario, no, you should be a-okay.