I would think that 55db gain is way too high for most or all MM and MI
cartridges. Usually it’s around 40db ? But maybe Ralph’s preamps can be
customized to change the gain.
The phono section has an unusually high overload margin so you can run a MM direct, but we also offer a jumper plug that replaces a tube in the phono section; this knocks the gain down to a more manageable level for high output cartridges.
MP3 preamp into Gryphon Diablo integrated. Diablo has passive preamp.
Why would I want it ? Well, if I decided to have, temporarily or
permanently, solid state power amp my choice would be Gryphon, but I
wouldn't be able to afford Gryphon power amp even used. So basically I
would want just the power amp section of the Diablo, or older Callisto
and Atilla. I took a look, Gryphon's input impedance is 10 kohm RCA and
40 kohm XLR.
FWIW the MP-3 has no worries driving a 10K input impedance. The output can also be configured to drive single-ended.