Models 2272/2273
Single channel microphone and instrument preamplifier

Input makes all the difference.

Technical Specifications

Frequency response: ‹1Hz-125kHz
(Clean Gain 30dB, Tube Gain off, output level 0dB, +/- 0.5dB)

Frequency response: ‹1Hz-310kHz
(Clean Gain 30dB, Tube Gain off, output level 0dB, +/- 3dB)

Frequency response: ‹1Hz-125kHz
(Clean Gain 30dB, Tube Gain 1dB, output level 0dB, +/- 0.5dB)

THD+N: 0.0005%
(Clean Gain 24dB, Tube Gain off, output level +6dB, 20-22kHz, +25dBu out)

THD+N: 0.032%
(Clean Gain 23dB, Tube Gain 1dB, output level +6dB, 20-22kHz, +25dBu out)

Noise: -95.4dBu
(Clean Gain 10dB, Tube Gain off, output level 0dB, 20-22kHz, A-weighted)

Noise: -91.8dBu
(Clean Gain 30dB, Tube Gain off, output level 0dB, 20-22kHz, A-weighted)

Noise: -67.2dBu
(Clean Gain 60dB, Tube Gain off, output level 0dB, 20-22kHz, A-weighted)

Noise: -86.4dBu
(Clean Gain 20dB, Tube Gain 10dB, output level 0dB, 20-22kHz, A-weighted)

EIN: 127.2dB
(Clean Gain 60dB, Tube Gain off, output level 0dB, 20-22kHz, A-weighted, 40Ohm)

Dynamic response: ›130dB
(20-22kHz, A-weighted)

Common Mode Rejection: ›80dB
(Clean Gain 30dB, Tube Gain off, 1kHz, Input -30dBu, output level 0, w/o transformer)

Maximum Output Level: +34dBu

Max. Input Level (Mic Input, Hi-Z Input): +17dBu

Input Impedance (Instrument input): ›1MOhm

Output impedance: ›75Ohm

Slew Rate: ›40V/µs
(Clean Gain 30dB, Tube Gain off, Output Level +6dB)

Phantom power: 48V +/-2V

Power consumption (w/o AD converter): 25W