I've got a receiver from the 70s that's been working fine until the last few weeks - it's cracking in the right front speaker, with no signal present (and it doesn't seem to be affected by volume). It ...
1. Is Amplifier Weight an Indicator of Robust Amplifier Design? You have to find out if the amplifier is a Class A/B analog amp or a Class D digital amplifier before you can generalize about weight ...