20, 30, 60, 100 CPS shelf boost, 0 – 13.5 dB
20, 30, 60, 100 CPS shelf attenuate, 0 – 17.5 dB
3, 5, 8, 10, 12 KCS peak boost, 0 – 18 dB
10 KCS shelf attenuate, 0 – 16 dB
Input Transformer: 600 Ohms
Output Transformer: 600 Ohms
Noise: Below -75 dBm
Distortion: ≤ 0.15% at +10 dBm into 600 Ohms
Amplifier: Flat, 20 CPS to 20 KCS, +0 / -1 dB, ref 1 KCS
Tubes: 1 ea 12AX7, 6AQ5, 6X4