Quietest amp you ever owned ?

My nomination is a tossup between the Tom Evans Linear A and the Wavelength Triton. Both are quieter than any of the SS amps I've owned - so quiet that with my ear inside the 97dB speaker cones I can't tell if they're running. This is with the Tom Evans Vibe line stage, because all the other preamps I have except for a TVC add way more noise than either of these amplifiers.

Noise on the Wavelengths was measured during construction at .12 mV or 120 microvolts... Both are super-quiet, but the Linear A manages to put more music in front of that black background - but that's a topic for another thread.

I just changed over to balanced cables on my Spectron Digital One and it is absolutely dead quiet all the way to maximum setting on the volume control. But once fed a signal, the dynamics are unbelievable! (I also use Rothwell Electronics line attenuators on the input and Spectron's own Zobel networks on the speaker posts).

Singlepower Audio SDS-XLR tube headphone amp. Even through the most sensitive headphones with volume up all the way....Not a peep.

Red Wine Audio Signature 30.

I've heard the Red Wine Audio Signature 30 and have to agree it is extremely quiet. Want to get the newest version of the Antique Sound Labs KT88 single-ended tube amp with remote.