C220 Tube Preamplifier Specifications
FREQUENCY RESPONSE
+0, -0.5dB from 20Hz to 20,000Hz
TOTAL HARMONIC DISTORTION
0.08% from 20Hz to 20,000Hz
MAIN OUTPUT
2.5V for rated input
MAXIMUM VOLTAGE OUTPUT
8V RMS Unbalanced, 16V RMS Balanced
SENSITIVITY (for rated output)
High Level: 450mV Unbalanced, 900mV Balanced
Phono: 4.5mV
SIGNAL-TO-NOISE RATIO (A-Rated)
High Level, 90dB below rated output
Phono: 80dB below 10mV input
INPUT IMPEDANCE
High Level: 22K ohms
Phono: 47K ohms; 65pF
MAXIMUM INPUT SIGNAL
High Level: 5V Unbalanced, 10V Balanced
Phono: 50mV (@1,000Hz)
OUTPUT IMPEDANCE
250 ohms
VOLTAGE GAIN
High Level to Tape Output: 0dB
High Level to Main Output: 15dB
Phono to Main Output: 55dB
HEADPHONE OUTPUT IMPEDANCE
16 ohms to 250 ohms
TUBE COMPLIMENT
Phono Circuitry: 2-12AX7A
High Level Circuitry: 2-12AX7A
POWER REQUIREMENTS
240 Volts, 50/Hz at 75 Watts
OVERALL DIMENSIONS (H x W x D including front panel, knobs and cables)
6” (15.24cm) x 17-1/2” (44.45cm) x 18” (45.72cm)
WEIGHT
21 lbs. (9.59Kg) net
37.5 lbs. (17.1Kg) in shipping carton



