Quietest amp you ever owned ?

TRL ST-225 Integrated. Dead quiet, no hiss, no hum.

Incredibly fast and dynamic, too.

Best,

Jack

The degree to which an amp will be perceived as quiet or noisy depends to a certain extent upon how efficient (or inefficient) the speakers it is used with are, e.g, a 92 db/watt efficient speaker will make upstream components sound noisier than an 86 db/watt efficient speaker. In fact, the noise level with highly efficient speakers, like horns or many single-driver speakers, can be intolerable unless partnering components are chosen with an eye toward their noise characteristics.

Innersound ESL 300. It's just dead quiet.

Michael

Elevick I never knew the Dynaco ST-80 was that quiet; I had a ST-120 way back in the early 70s. The reason I am asking this question is that I am running a pair of modified Klipsch KLF-20s in a second system and, as Raqual has pointed out, the more efficient the speaker the more the amplifier noise comes through. Speaking of Dynaco I had a ST-70 at one time with the Sutherland front end board and it was dead quiet; on the other hand the stock amp with the 7199s was pretty noisy. Thanks everyone for your input; I've learned a great deal.

Yamaha M-80

SNR -127dB