Legacy Series - MM4D

150w, 4 inputs Mixer/Amp

The MicroMix MM4D powered box mixer is the ideal PA solution for most applications where 150 watts (@4 ohms) is more than enough power, and four inputs are all that's required. Professional features like balanced XLR mic, 1/4-inch phone and dual RCA line inputs, onboard user controlled digital effect unit and tape outs (with separate level control) make the MM4D the perfect mixer for live PA, rehearsal, installation or announcement PA applications. The rugged and reliable MM4D has a scratch resistant front panel, durable carpet covering and metal corner protectors.

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  • Amplifier delivers 150 watts of power (150 W @ 4-ohms)
  • All four channels have two bands (+/- 15db) of shelving EQ
  • XLR microphone inputs on all 4 channels
  • 1/4" TRS line level inputs on channels 1 through 3
  • Dual-RCA input built-into channel 4 for easy hookup for CD-Players and Cassette Decks
  • Digital Echo Effects unit for natural sounding vocals
  • Effects level controls on all 4 channels with a Master level control at the final stage
  • Customizeable repeat and Delay adjustment controls for Digital Effects unit
  • RCA Tape outs with level control for live recording
  • 1/4-inch TRS Amp In / Line Out
  • Voltage select switch for easy selection of 120V or 230V operation
  • Scratch resistant front panel
  • Durable carpet covering
  • Metal corner protectors
  • Fan cooled


Yorkville Box Mixers feature 15mm plywood and heavy-gauge metal construction to withstand all the rocking and rolling associated with life on the road. Inside we use high quality epoxy circuit boards coated with thick copper laminate and precision, low noise components. A large heatsink and a variable speed fan ensure that the mixers keep their cool. Of course MicroMIX™ mixers also come with Yorkville's standard two year (even if you break it!) transferable warranty in the USA and Canada. These are just a few of the characteristics which make MicroMIX™ mixers the "Best Bang for the Box".


Number of Channels 4
Mono Channel EQ 2 band shelving
Channel Effects Digital Echo
Inputs - XLR (bal) Ch. 1 - 4
Inputs - 1/4" Ch. 1 - 3
Inputs - RCA (unbal) Ch. 4
Internal Effects Digital Echo with Repeat and Delay controls
Effects Send Yes - 1/4-inch
Effects Return Yes - 1/4-inch
Effects Return to Main Yes
Record Outputs Tape Out with level control
Max Gain to Line Out -Mic Input (dB) 44
Max Gain to Line Out -Line Input (dB) 24
Main Outputs (Line Level) 1/4-inch
Outputs - Amp A - 1/4" Jacks 2
Mixer - Freq Resp (Tone and EQ Flat,�2dB) 20 - 20,000
Amp A-Power Output@8 Ohms (0.1 PER THD 1kHz) 100 watts
Amp A - Power Output @ 4 Ohms 150 watts
THD - 1kHz (dB) less than 0.1%
THD - 20Hz-20kHz (dB) less than 0.1%
Typical crosstalk -1 kHz (dB- 65
Power Consumption (typ/max) 1.0 A @ 120VAC / 0.5 A @ 240VAC
Protection Clip LED
Cooling Fan
Dimensions (DWH, inches) 9 x 17.75 x 6
Dimensions (DWH, cm) 22.85 x 45 x 15.25
Weight (lbs/kg) 19.2 / 9.7

Specifications subject to change without notice