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MP 4 Mixer for Scratch Live

Front Panel

MP 4

Rear Panel

MP 4

The MP 4 has been discontinued.
Support is still available from scratchlive.net.

Scratch Live

MP 4 Specifications

Parameter Specification Conditions
Phono / Line Inputs: 2 stereo pairs of RCA jacks Switchable RIAA curve
.....Input Impedance 47k / 220pf
.....Gain 46 dB / 0 dB 1 kHz
Line Inputs: 2 stereo pairs RCA jacks
.....Input Impedance 20 kΩ 1 kHz
.....Gain 14 dB 1 kHz
.....Frequency Response 10-27 kHz (+0, -3 dB) Gain 10 dB, 2 kΩ load
.....Noise, Unity Gain -82 dBu 20 kHz BW
.....Noise, Max Gain -80 dBu 20 kHz BW, re +4 dBu
.....THD+N 0.05% 20 kHz BW, re +0 dBu
.....Crosstalk <-70 dB 1 kHz
.....Control feedthrough <-80 dB 1 kHz
Tone Controls: Baxandall Two-band, shelving
Metering: Dual mono, 4-segment Peak responding
MIC Input: Balanced instrumentation ¼" TRS Jack
.....Input Impedance 511 Ω Each leg to ground, 1 kHz
.....Gain 60 dB 1 kHz
.....Frequency Response 20-20k Hz (+0, -3 dB) Gain 50 dB
.....Equivalent Input Noise -111 dBu 150Ω source, gain 50 dB
.....Common Mode Reject >40 dB at 1 kHz 150Ω source, gain 50 dB
House / Aux. Outputs: Stereo Balanced, ¼" TRS jacks
.....Output Impedance 200 Ω each leg, 1 kHz
.....Gain 6 dB 1 kHz
.....Maximum Output +24 dBu 1 kHz, 2 kΩ load
Converters: A/D 24-bit / 48 kHz 108 dB dynamic range
.....D/A 24-bit / 48 kHz 110 dB dynamic range
USB: 1.1, full speed 1 unit load (100 ma) isolated
Agency Listings: UL/cUL/CE  
Power Requirement: 100 to 240 VAC 50/60 Hz, 7W
Construction: All Steel 19" x 1U rack-mount
.....Unit Size 1.75"H x 19"W x 5.3"D 4.4 cm x 48.3 cm x 13.3 cm
.....Unit Weight 4 lb 1.8 kg
.....Shipping Size 4.25" x 20.3" x 13.75" 11 cm x 52 cm x 35 cm
.....Shipping Weight 8 lb 3.6 kg
Note: All specifications are typical unless otherwise stated.