Detail：
  　　
dbx1231 equalizer
Input
Interface: a quarter-inch TRS, XLR socket (pin 2 hot positive side, female,) as well as the terminal strip
Type: electronically balanced / unbalanced, RF filtered
Impedance: Balance of 40kΩ, unbalanced as 20 kΩ
Maximum input level:> + 21dBu, balanced or unbalanced
CMRR:> 40dB, typical values ​​of> 55dB, 1KHz
Output
Interface: a quarter-inch TRS, XLR socket (pin 2 hot positive side, per head), and the terminal strip
Type: impedance balanced / unbalanced, RF filtered
Impedance: Balance of 200Ω, 100Ω unbalanced for
Maximum input level:> + 21dBu, balanced / unbalanced load or larger loads 2kΩ
CMRR: 18dBu, balanced / unbalanced (pick 600Ω load)
System Performance
Band width: 20Hz-20KHz, + 0.5dB / -1DB
Frequency Response
Dynamic Range: 109dB 115dB
SNR: 90dB 97dB
Total Harmonic Distortion + Noise: <0.005%
Crosstalk between channels: <-80dB, 20Hz-20KHz
Function Switch
EQ Bypass: The signaling pathway partially bypassed graphic equalizer
Low frequency switching (concealed): Start 40Hz 18dB / oct high-pass Bessel filter
Range (concealed): Select ± 6dB or ± 15dB fader boost / cut range
Indicator
Output Level: 4-LED strip icon indicator (green, green, yellow, red) respectively -10,0, + 10 and + 18dBu
EQ Bypass: one LED: red clipping indicator: an LED; red
Low-frequency switching: one LED: red + / 6dB; an LED; yellow
± 15dB: one LED: red
Power supply:
Operating voltage: 230VAC 50Hz
Power consumption: 24W
Power connector: IEC plug
Size and weight:
1231: (High 13.4cm × width 48.3cm × depth 20.1cm)