How do you break in a preamp

You need I bought M8 preamp musical fidelity I was going to return it because don't like what I'm hearing but only 6 hours from what I'm reading is to soon to make a decision and return it hopefully with 50 more hours or more I be able to get the sound I expect for that kind of money

Agreed on leaving it on and using it. That's what I did for my XP-22 and I leave it on 24/7, I didn't notice a substantial difference as it broke in.

@stanwine congrats!!!

if you stream music just have your streamer playing 24/7. You don’t need to have the amp on. Also, keeping the preamp on even if not playing will help too. Just turn off the display when not listening (that’s what I do with my xp-12). 
You’ll need about 200hrs of break in. 

@audphile1 -

      I'll bet stanwine's pre is broken in by now.

               Just a guess!

                      😉

@rodman99999 HAHAHAHA!!!