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!


The power-up condition triggers failures due to inrush current.  In standard failure theory, the starting condition is always the toughest (it's the same for mechanical systems).  Electrolytics are typically rated for 85C, which is actually quite low.  They try to get nicer 105C rated ones for the supply.  Unfortunately many amp designers don't think about thermal management enough.

I listen 2.5-3 hrs every day for the most part...

everything stays on for me (all SS):

Power Amps


Phono Preamp


Master Clock Generator

Turntable ADS


I listen to my system every day for 4-5 hours and turn it off after.

Turn in on, more or less 30 min before the listening session takes place.

Some of my gear have tubes (hybrid integrated amps, preamps and dacs) and I want to extend the life of the components and save on the power bill.