Fsmithjack, re the BAT VK-50SE (the reference in JA’s measurement writeup to VK-500SE appears to be an error), given my previous comment you would have a balanced output impedance of 4.6K at 20 Hz driving a balanced input impedance of 30K (or perhaps 29K), which is a ratio of a bit more than 6. You would also have a very wide variation in output impedance over the frequency range (from 414 ohms to 4.6K). Not ideal, and personally I wouldn’t risk introducing a compromise like that.
The Atma-Sphere preamp that was suggested would certainly be fine in terms of impedance compatibility (Ralph’s designs do not have capacitively coupled outputs), but I don’t know if it would provide the warmish sonic character you appear to be looking for.
Regards,
-- Al
The Atma-Sphere preamp that was suggested would certainly be fine in terms of impedance compatibility (Ralph’s designs do not have capacitively coupled outputs), but I don’t know if it would provide the warmish sonic character you appear to be looking for.
Regards,
-- Al