Hi all,
since there is still discussion which rec level setting gives 0dB of amplification from line in to line out, I pulled out my old Radio RIM PG 100 (a battery powered 1khz sine generator with attenuator and AC millivoltmeter). Calibration was checked against a Hameg HM8012 4 1/2 digit True RMS DMM.
Here are my findings:
0dB from line in to line out (1Ohm source resistance, 100k load resistance, Limiter and low cut off): Rec level at 6.2 (estimated).
While I was at it, I checked some levels at that setting:
-12dB on the level meter: approximately 245mV
-6dB on the level meter: approximately 490mV
0dB (FS) on the level meter: approximately 940mV.
Due to the nature of the on screen VU meter, there is an unavoidable inaccuracy when setting/reproducing levels.
Since I own an EU (CE certified) version, your values for 0dB may vary. Sony is known to have changed output levels to comply with local regulations (headphone levels for example).
Hope that helps.
Greetings,
Rainer