Quietest amp you ever owned ?


A few years ago I had the little Antique Sound Labs MG SI 15 DT integrated and was impressed how quiet it was; in other words with the amp on and no music playing it was dead quiet when I put my ear right up to the drivers on the speaker. I am curious what other amps out there are as dead quiet since most amps have a slight hum or hiss that can be heard when music is not playing. At the time I was using Coincident Conquest speakers which are pretty efficient.
bobgates
A 1982 TRANS-NOVA TWIN 200 made by Acoustat; dead quiet at full volume. I don't use it anymore, but I still have it.
The new TRL D-225 dual mono amp is the quietest I have ever heard. No hum or hiss whatsoever.
TRL ST-225 Integrated. Dead quiet, no hiss, no hum.

Incredibly fast and dynamic, too.

Best,

Jack