I have used a preamp (a McIntosh C46 and a Rowland) to get remote volume control for my headphone amps
with surprisingly good results.
If a tube unit is used in a solid-state setup, it can add some add some tubiness.
(They actually sell tube buffer units; PS Audio I think has these.)
And some preamps have bass/treble controls (Macs, Accuphases, Van Alstines.)
And also, you can get some more boost for a headphone amp that may not have enough power.
Has anyone tried this?







