Used Mackie 1604VLZ4 16-Channel 4-Bus Compact Mixer, 20Hz-50kHz Frequency Response at 35bB, 2.5kOhms Impedance

Main Mix Noise:
Main Mix Fader at Unity, Channel Faders Down: -88.5 dBu (92 dB signal-to-noise ratio, ref +4 dBu)
Main Mix Fader at Unity, Channel Faders at Unity: -82.5 dBu (20 Hz to 20 kHz bandwidth, 1/4" main out, channel gains at unity, channel EQs flat, all channels assigned to main mix, odd channels panned left, even channels panned right)

Microphone In to Insert Send: <0.0007%
Microphone In to Main Out: <0.005%
(1 kHz at 35 dB gain, 20 Hz to 20 kHz bandwidth)

Channel Mute Switch Engaged: -84 dBu
Channel Gain Knob Down: -84 dBu (1 kHz relative to 0 dBu, 20 Hz to 20 kHz bandwidth, line in, 1/4" main out, gain at unity)

Microphone Input to Main Output (Gain at Unity):
+0, -1 dB, 20 Hz to 50 kHz
+0, -3 dB, <10 Hz to >100 kHz

150Ohms Termination: -128.5 dBu, 20 Hz to 20 kHz
Microphone input to insert send out, maximum gain

Better than -70 dB at 1 kHz

Microphone In: +22 dBu
All Other Inputs: +22 dBu
Main Mix TRS Out: +28 dBu
All Other Outputs: +22 dBu

Microphone In: 2.5kOhms
Channel Insert Return: 2.5kOhms
All Other Inputs: 10kOhms or greater
Tape Out: 1.1kOhms
All Other Outputs: 120Ohms

High Shelving: +/-15 dB at 12 kHz
Mid Peaking: +/-15 dB sweep 100 Hz to 8 kHz
Low Shelving: +/-15 dB at 80 Hz
Low Cut Filter: 18 dB/octave, -3 dB at 75 Hz

50 W, 100 to 120 VAC, 50 to 60 Hz

32 to 104 deg. F (0 to 40 deg. C)

100 to 120V: 1 A slo blo, 5 x 20 mm
220 to 240V: 0.5 A slo blo, 5 x 20 mm

17.0 x 17.3 x 5.1" / 431.8 x 439.42 x 129.54mm

20lbs / 9.07kg