when I owned McCormack DNA-125 I kept it on 24/7
kept my DNA-225 on starting on Thursday if I knew I'd be listening on the weekend.
These amps do sound good when they are hot and I did notice especially with the 125 that the best sound is reached after the amp os on for about 24 hours. DNA-225 sounded better in general even cold, so it was not such an issue. But it also sounded better when it was on for hours.
Leaving these amps on 24/7 does raise your electrical bill but not by much. Keeping DNA-125 on 24/7 is about equivalent of a 100w light bulb. If this isn't a killer for you, then leave the amp on. You won't hurt it by leaving it on all the time.
kept my DNA-225 on starting on Thursday if I knew I'd be listening on the weekend.
These amps do sound good when they are hot and I did notice especially with the 125 that the best sound is reached after the amp os on for about 24 hours. DNA-225 sounded better in general even cold, so it was not such an issue. But it also sounded better when it was on for hours.
Leaving these amps on 24/7 does raise your electrical bill but not by much. Keeping DNA-125 on 24/7 is about equivalent of a 100w light bulb. If this isn't a killer for you, then leave the amp on. You won't hurt it by leaving it on all the time.