You should be fine with external switching without generating any boom. I've been inside that unit and the switch is nothing fancy-- just an AC line switch with a soft-start thermistor which will continue to function in conjunction with external switching. The amp also has a warm-up relay that blocks output to speakers until the tubes bias up.
Most simple computer power strips will compromise performance. If you're handy or have access to an electrician, a better approach would be to cut a decent quality power cord and insert an electrical box in-line in the cord with a 20A AC switch. The box should be grounded as per electrical code.
Most simple computer power strips will compromise performance. If you're handy or have access to an electrician, a better approach would be to cut a decent quality power cord and insert an electrical box in-line in the cord with a 20A AC switch. The box should be grounded as per electrical code.