i have a technics au-600 integrated stereo receiver powering the subwoofers for my surround sound. the manual says not to leave it on but there is no remote for it and the power button is stuck on so i phisicaly have to move my tv to unplug it. i found this amp at the end of someones drivway while it was pouring rain on garbage day about 5 years ago and i have had to hot glue it all over because plastic and metal parts are falling of. but this thing must be almost 20 years old and its been through hell! so if i just leave it on with no audio input until i turn my tv on about 3 hours a day will it be ok to stay on 24/7?