The left speaker is more quiet and the sound crashes. It can improve (but not always) after 5 -10 min. More often I have to slap the top of the amp (Marantz PM7200 I bought 18yrs ago) to get the sound back to normal. The issue persists after bringing this amp twice to a local repair music instrument shop.
1/ Any idea what the issue is with the amp? (I tested speakers, cables and the issue comes from the amp)
2/ Could turning-off the amp directly damage amp parts/components? (instead of putting on stand-by with the remote control before turning off the amp)
Thank you for your views.