Popping sound when channel switching

[irishguy977]

2 channel Dual Recto:

When switching from Orange Channel to the Red Channel and vice versa, a single quick pop-like noise comes from the speakers. Any ideas of what this could be and how to fix?

 

[Commander Coo1]

switch back and forth a few times when you first turn the amp on and it will release the build up of static and you shouldnt get the popping sound.
correct me if im wrong anyone

 

[oyster]

Yup, and after a week mine didn't do the popping noise at all any more.