Debate: Class D amps need 48 hours of warmup

Have you listened to your amps cold? Warm? Both ways? What was your experience? I’ll hold my own observations to not bias the replies.

Did you leave them off while on vacation and then come back to find they sounded hard and strident?

erik_squires09-21-2025 10:53pm

rar1 Details Discussions Posts This discussion Message User 1,884 posts 09-21-2025 at 11:29pm Copy Comment URL Report Comment Edit Delete I have a Heaven 11 Billie integrated amp. It's a hybrid tube/ Class D amp. After a 1/2 hour of non-use, the amp shuts itself off. I will warm up the amp for 15 minutes before I listen. Rich
erik_squires OP Details Discussions Posts This discussion Message User 17,585 posts 09-21-2025 at 11:33pm Copy Comment URL Report Comment Edit Delete @rar1 - Does it go into "standby" where the Class D part is still on, or no?
soix Details Discussions Posts This discussion Message User 11,256 posts 09-21-2025 at 11:33pm Copy Comment URL Report Comment Edit Delete 48 hours?!? Seems excessive, and I’d think playing music for a half hour or so would be sufficient (based on nothing BTW), but maybe @atmasphere can weigh in from an expert’s standpoint.
avanti1960 Details Discussions Posts This discussion Message User 1,745 posts 09-21-2025 at 11:51pm Copy Comment URL Report Comment Edit Delete Who would own an amplifier that didn't sound its best until being powered on for two full days? My ears tell me that they take about as long as Class A-B amps to "worm up" / sound their best BUT- sound worse than class A-B until they are warmed up.