30 hours of work (functionality check and testing)

Vincent SA-31MK hybrid preamplifier. The amplifying stages of both channels are built completely separately (double mono). The output amplifier is assembled according to the scheme of class A. It is possible to connect two power amplifiers to each channel.
output lamps: 4 x 6N16 (nuvistors), frequency range: 20 Hz - 20 kHz, +/- 0.5 dB,
sensitivity: 350 mV,
output voltage: 2 V,
coefficient of nonlinear distortions: & lt; 0.1% (1 kHz, 1 W),
signal to noise ratio: & gt; 95 dB
Inputs: 6 x RCA.
Outputs 2 x RCA, 1 x Rec Out.
Dimensions 430 x 95 x 365 mm.
Weight 8.0 kg.