have a 2/90/2 poweramp and it has intermittent issue when switching the power on, there’s an audible “CLUNK”. it appears to work just fine afterwards but it sounds concerning
I’ve also noticed that there’s not much of a sweep when using the presence and depth control in either voicing modes.
Also, which voicing option (in or out) do you recommend for FRFR applications?
The clunk is normal. It’s just the power transformer at initial turn on. It’s more noticeable than a typical amp head because it’s close to the steel sidewall of the chassis which reacts to the magnetic field of the transformers initial charge.
The presence and depth controls are subtle. They are not meant to be tone controls. The voicing switches do act to enhance the behavior of the presence and depth controls, however.
I would recommend leaving the voicing switches out when using the amp in an FRFR application.
Dave