Hey Tom.
I will look for that tomorrow, and try to post it.
T
EDIT:
Ha, found it on my laptop at home right away.
Here is what Oliver emailed me back about three years ago when I got mine:
Hello Terry,
Here is a chart of the input sensitivity vs. clipping with reference to
20/1k/20k Hz at 0dB gain
+6dB max input 23dBu (10V) same as 0dB
0dB max input 17dBu (5V) mix buss, two bus, etc.
-10dB max input 12dBu (3V) modern condensers high output like TLM, etc.
-20dB max input 6.6dBu (1.643V) condensers like U47, M49, KM5x, KM8x, etc. and similar
-40dB max input 0dBu (0.775V) modern ribbons and standard (like SM57/58) dynamics; condensers like C12(a), C60, etc.
-40 dB max input -8.5dBu (0.2945V) vintage ribbons and low output dynamics
Those setting above are just suggestions with reference to 0dB-0.775V, the V78M was designed with soundforming (over and underloading of the input) in mind, so whatever sounds best is what you should use.
output clipping is unloaded/10k load min. +12dBu and loaded with 600 Ohm +11dBu.
So in any case as long you do not try to use it on a +12dB (old IRT specs) system you should be fine, and any setting +4/8dB, etc.
Best regards,
Oliver