Juicy Music Peach was received today and installed. Really fun preamp! Very quiet.
It has two output impedance settings: SuperLo Z (90 ohms) for use with low input impedance amps (typically SS), and HiZ (3500 ohms) for use with typical tube amps. I find myself using SuperLo Z with my Pass Labs amps that have fairly low input impedance specs.
The HiZ mode reminds me of triode mode on an amp that has both triode and pentode modes; it has a wide image with lots of air and a touch of softness. The SuperLo Z mode would be analogous to pentode mode: a bit more punch, and a slightly deeper yet narrower image. I can definitely see where the HiZ mode could be preferable in a system with tube amps because of the very natural presentation of the music.
Lots of toe tapping going on here at Chez Tvad.