Leave it on. Caps in many amps take time to charge up fully and give best sound. I had a pair of Odessey monos with over 220 thousand uF. I found them difficult to listen to even after being on for an hour. I just left them on 24/7 after that and there was an obvious change for the better in sound quality.
Amp — Leave on or turn off
I always turned my Benchmark AHB2 amp off after use every night. After all, why is there an on off switch on the front panel if not to do that? Last night I accidentally left it on. This morning, when I played my first record, I couldn’t believe my ears. The same record I played last night sounded infinitely better. I tried a second record and that, too, was much better.
I know there’s a debate on the question of leaving an amp on all the time.
I now know where I stand!