Pultec EQP-1S Tube Program Equalizer

The EQP-1S is a very rare variant of the EQP-1A, which features modified low-frequency shelf boost/atten curves, additional peak boost frequencies & high-frequency shelf boost.

Specifications:

30, 40, 70, 100 CPS shelf boost, 0 - 13.5 dB

30, 40, 70, 100 CPS shelf attenuate, 0 - 17.5 dB

1, 2, 3, 4, 5, 6, 8, 10, 12 KCS peak boost, 0 - 18 dB; 5, 10 KCS shelf boost, 0 - 14 dB

5, 10, 20 KCS shelf attenuate, 0 - 16 dB

Input Impedance: ~600 OhmsOutput Impedance: ~50 Ohms

Noise: 92 dB below +10 dBmDistortion: ≤ 0.15% at +10 dBm into 600 Ohms

Amplifier: Flat, 20 CPS to 20 KCS, +/- 0.5 dBTubes: 1 ea 12AU7, 12AX7, 6X4