Group 2 stereo microphone 32 8 7 × 4 matrix grouping independent phantom power per channel mixer 
 Frequency response: Mic / Line input to any output, 20Hz-20kHz, <1dB THD + Noise: Mic level is-30dBu +20 dBu, all output is, <0.006% (1 kHz) 
 Noise: 22 Hz-22kHz bandwidth, RMS measurements: 
 Microphone Equivalent Input Noise: -128 dBu, (150Ω source impedance and a fixed gain) 
 Mix output: <-82 dBu (40 input sent to the mix) 
 Groups outputs: <- 83 dBu 
 Auxiliary Output: <- 80 dBu 
 Matrix output: <- 89 dBu 
 Crosstalk (1kHz, typical): 
 Input channel mute: <- 97 dBu 
 Input fader off: <- 95 dBu 
 Audio-visual isolation: <- 77 dBu 
 Mixing path isolation: <- 97 dBu 
 Grouping path isolation: <- 97 dBu 
 Adjacent channel crosstalk: <- 99dBu 
 Grouping to the mix: <- 89dBu 
 Aux send pot isolation: <- 84dBu 
 Send potentiometer matrix isolation: <- 89dBu 
 Common-mode rejection ratio (CMRR): Typical value: 1kHz 80dB 
 Maximum input and output levels: 
 Mono and stereo microphone input: +15 dBu 
 Mono and stereo line input: +30 dBu 
 Stereo return and insert return: +20 dBu 
 Any output: +20 dBu 
 General Operating Level: 0dBu 
 Earphone output power: 2 × 250mW/200Ω 
 Size: Width: Weight: 
 12 channels 730mm (28.73 ") 20kg (44.1 lbs) 
 16-channel 842 mm (33.13 ") 22kg (48.5 lbs) 
 24-channel 1065 mm (41.93 ") 27kg (59.5 lbs) 
 32-channel 1300 mm (51.17 ") 32kg (70.5 lbs) 
 40-channel 1523 mm (59.96 ") 37kg (81.6 lbs) 
 Input and output impedance: 
 Microphone Input: 2KΩ 
 Stereo line input and return: 10 KΩ 
 Input Channel insert return: EQ into the 5 KΩ, the other for 3KΩ mix, grouping, support and direct the output: 150Ω 
 Insert Send: 75Ω 
 Recommended Headphone Impedance: 50Ω-600Ω 
 High-pass filter (Mono input): 18dB / octave, 100Hz 
 EQ (channel input): 
 High frequency: 13 kHz, + /-15dB, 2-order high-pass filter 
 High-frequency: 550Hz-1.3Hz, + /-15dB, Q = 1.5 band-pass filter 
 Low frequency: 80Hz-1.9kH, + /-15dB, Q = 1.5 band-pass filter 
 LF: 80Hz, + /-15dB, 2-order low-pass filter 
 Level Meter: Input channels: 4 single three-color light-emitting diode LED level meter 
 Output channels: 7 12 tri-color light-emitting diode LED level meter 
 Power consumption: AC 50/60 Hz, 85V-270V AC universal input power supply 
 Power consumption: less than 150W 
 Operating conditions: temperature range: -10 ℃ ~ +30 ℃ 
 Relative Humidity: 0% to 80%