I’ve seen similar problem before, an amplifier generating hum through speakers after whatever is feeding it a signal has been turned off, although the time lapse thing is curious.
I’ve had good luck in this situation using a separate power sequencer that would disconnect the amp from the electrical service (i.e. the equivalent of unplugging it from the wall). However, finding a sequencer that will work from an AVR’s 12v trigger is a challenge, especially at an economical price.
Lacking that, your best option is unfortunately the most inconvenient: Manually turning on the power amp after turning on the AVR, and then on power-down, turn off the amp wait 15-20 seconds before turning off the AVR. This will prevent pops in the speakers.
Regards,
Wayne
I’ve had good luck in this situation using a separate power sequencer that would disconnect the amp from the electrical service (i.e. the equivalent of unplugging it from the wall). However, finding a sequencer that will work from an AVR’s 12v trigger is a challenge, especially at an economical price.
Lacking that, your best option is unfortunately the most inconvenient: Manually turning on the power amp after turning on the AVR, and then on power-down, turn off the amp wait 15-20 seconds before turning off the AVR. This will prevent pops in the speakers.
Regards,
Wayne
