I agree with the preceding responses. I would add that you should be sure to follow the proper turn-on and turn-off sequence, which is amplifier on last and off first. Some preamplifiers and other upstream components can generate wicked transients at turn-on or turn-off, which would not be healthy if amplified to 400+ watts (perhaps even clipped) and applied to your speakers.
After turning the amplifier off it would also be good practice to wait some seconds before turning off the preamp, since the amp may be able to continue to amplify for a short period of time after being turned off, using internally stored energy.
Regards,
-- Al
After turning the amplifier off it would also be good practice to wait some seconds before turning off the preamp, since the amp may be able to continue to amplify for a short period of time after being turned off, using internally stored energy.
Regards,
-- Al