Originally Posted by Luckydog
Another musician once told me that, after use, turning off the power before putting the standby switch back on allowed the capacitors to drain voltage. Is that a myth?
It is good practice to not touch the standby when turning off the amp. Some amps are designed to have a pathway for the electrolytic capacitors to drain when the power is off, some don't. Leaving the standby switch closed can help those amps that don't.
It takes time for the caps to drain so turning off the amp and waiting a minute then putting the amp in standby may not give the caps enough time to discharge. The amount of time that it takes a capacitor to discharge depends on the voltage across the capacitor, the capacitance, and the resistance in the discharge pathway. The important thing to remember is that it is different for make of every amp. So to be safest, just leave the standby in playing mode and put the amp in standby before turning it on next time.