231 is an equalizer with advanced features:

---31 feedback frequency display

---Feedback threshold adjustment

---Variable frequency high and low pass filter

---Input, output peak indication

---The input signal is throb VU indication

--- Proportional-Q

---(Balance/Unbalance)Constant output level

SPECS

SNR(A-weighting): ＞95dB

Freq. Response: 10Hz-40KHz（+/-0.3dB)

THD: ＜0.03%

Center frequency filter: 3rd order filter

Center frequency accuracy: ＜+/-1.5%

Input filter: Variable high and low pass filter

Frequency point maximum ascending or decay: +/-12dB

DR: 118dB

Input Gain Control: +/-20dBU

Power: AC220V/240V,50Hz-60Hz

Dim: 483x133x200mm

Weight: 4.8kg