VAC Standard Mk II Preamplifier - Manual (Page 9)

Page 9
VAC STANDARD MK II PREAMPLIFIER SPECIFICATIONS (typical)
Type: Vacuum tube line stage with external power supply and home
theater (direct power amplifier) mode.
Options: Remote control for volume & mute
Dedicated MM phono input
Dedicated MC phono input
Line stage preamplifier:
Gain: 24 dB
Maximum input signal: Essentially infinite (attenuation precedes line stage)
Main output: Inverting to RCA
Pin 2 positive “hot” on XLR, pin 3 negative
Tape output: Unity gain from selector, non-inverting (archival correct)
Phono stage preamplifier (optional):
Gain: 40 dB (measured at tape output)
Residual noise: 3 mV at output (S/N ratio approx. 69 dB)
Overload: 117 mV @ 1 kHz = 8 volts RMS output
460 mV @ 10 kHz
Frequency response: RIAA +/- .25 dB
Notes: Does not invert absolute phase.
Tube compliment:
3 x 12AX7 (phono option) (located on circuit board at left side of chassis)
2 x 12AU7/6189A (line stage)
2 x 12AX7 (line stage)