What Would Be the Reasoning Behind Leaving Class D Amps On?

I’ve always put mine in sleep mode, as for a reason to leave them on I have no idea.

....110dB from the the bass columns...

Well, you found where all the nail 'pops' in the sheetrock 'could appear'....not to mention framing nails, screws, lag screws, & misc. hardware....

*L*  Spouse went to the bomb shelter with a good book and earplugs? ;)

The issue of leaving a class D on all the time vs. turning it off is probably more dependent on what the Class D amp is.

I have had experience with Class D amps which use ICE output modules and I never liked them.   Those amps definitely seemed to smooth out if left on to warm up for an extended amount of time vs. just turning the system on and using it.  However I found the upper frequency range to be harsh even after warmed up; it was better, but it grated on me with use.

I am currently using a pair of Anthem M1 mono block Class D amps.   This is a whole new world vs. the ICE based amps.  The M1's do not use any devices such as the ICE modules, it's all proprietary design and liquid cooled.   The M1's play super smooth at all times, I don't need to warm them up and I don't leave them on; it makes no difference that I can hear.   I prefer to leave them off and unplugged from the 240volt outlets when not in use just in case of storms or surges.  I do not trust surge protection devices as I have had major destruction due to lightning hits.

I also own a Parasound A 51 which runs in Class A up to a certain output power before is swaps over to Ab.   That amp seems to like some warming up to smooth out, but even when at a fully warmed up state of operation, it doesn't come close the M1's in performance.   I use it now to drive surround/rear/middle channels when using streaming music or HT films.   For two channel stereo, the M1's do the heavy lifting.   

If you’re listening regularly the answer is, because it sounds better. If you seldom listen to your system, turn them off. But if you listen to your system on a regular basis, and you care about the way your system sounds, leave your class D amplifier turned on.

Yours in music,

Ted Denney III

Lead Designer/CEO Synergistic Research Inc.

I have two large wyred4sound class D amps powering my home theater - 3x400 for the fronts and 5x250 for the surrounds. I hooked them up and turned them on in Feb 2012 and they haven’t been turned off since so that’s almost 10 years continually on.