How long it take before your system/amps sound

After two hours of warm up. SS equipment.And time of actual playing...not sure, probably an hour or a little longer. I did try a few times to leave it on for couple of days and heard no difference.

Fiddler, I have a dedicated 2 channel audio room that has been extensively treated. The room is dead quiet...the noise floor is almost nonexistent...no traffic noise, no noise from household appliances, no electrical noise, etc. Listening at around average of 80 to 85 dB in a room like this is plenty loud. 90 dB would give me a headache. So when the AC kicks in, the sound can be very annoying.

mcintosh told me on my mc-402,one hour,only piece in soild state,running all tube gear with this system,can tell after 40 minute's sounds real nice,,,,,,,,,,,,,,

Class A around 1/2 hour.

My BMC M1 amps take about two hours to get up to snuff. I turned them off tonight just to check whether that is still true.