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4 Channel Portable Mixer with Wireless & USB Inputs

The OSL M Series feature tabletop media mixers designed for maximum flexibility. The M4 portable mixer has the inputs, controls, and features to be used as a simple plug and play system. The M4, M7 & M10 models have hence become popular in the residential, hospitality & BGM applications

Critical Performance Indicators

Input Types

1x TRS Jack Phono Input
1x TRS Jack Mic Input
1x 3.5mm Aux Input
1x Wireless Playback & USB Playback

Input sensitivity

Line:80mV RMS
Mic:1.5mV RMS
1.3mV RMS


Line: 7V RMS max
Headphone: 0.5W into 47ohm

Signal to Noise Ratio:

Line: Better than 100dB
Mic: Better than 95dB
Phono: Better than 85dB

Channel Equalizer:

Mid: +12 / -25dB at 1.3 kHz
Bass: +12 / -35dB at 20 Hz
Treble: +12 / -20dB at 15 kHz

Frequency response:

Line: 20 – 20,000 Hz ±0.5dB
Mic: 20 – 15,000 Hz ±0.5dB
Phono: ±1dB; -3dB attenuation at 20 Hz to reduce rumble and feedback

Input impedence

Line: 10K ohm input impedance
Mic: 600 ohm input impedance
Phono: 47k ohm input impedance

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