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Adastra MM321 Rack Mixer – with BT/USB/FM Player 953.028UK


MM321 Rack Mixer – with BT/USB/FM Player

Available on back-order

SKU: 953.028UK Categories: , ,


Rack-mountable 1U mixer with built-in media player and Bluetooth receiver. 3 mono inputs connect via XLR microphone or line input (switchable). Each of these inputs has switchable +20V phantom power for use with condenser microphones or D.I. boxes and channel 1 has a variable priority function. Two stereo auxiliary line inputs are provided on RCA connectors with a stereo record output. Media player operating modes include 3.5mm Aux input, USB audio player, FM radio tuner and Bluetooth receiver for playback from a smart phone or tablet. Main left and right outputs are fed to XLR with an additional mono summed output on 6.3 jack. Versatile yet easy to use as a main mixer for background music, public address and house PA systems.



• Built-in Bluetooth receiver
• Media player with USB playback and FM tuner
• Switchable +20V phantom power
• Variable priority muting for channel 1
• 24V emergency mute contacts



Power supply100-240Vac, 50/60Hz (IEC)
Inputs : mic/line3 x XLR (bal/unbal)
Inputs : aux2 x L+R RCA
Input : line3.5mm jack to media player
Audio sourceInternal Bluetooth, USB & FM player
OutputsL+R XLR, Mono 6.3mm jack, Record out (RCA)
Emergency control24V contacts mute all except channel 1
Phantom power+20V (switchable channels 1-3)
ControlsMedia, 3 x Mic/Line, 2 x Aux, Treble, Bass, Master level
Rear panel controlsPriority muting level, mic/line and phantom DIP switches
Input impedance2.2k Ohms (mic/line), 10k Ohms (aux)
Frequency response : mic20Hz – 18kHz
Frequency response : line14Hz – 20kHz
Frequency response : aux10Hz – 23kHz
Input sensitivity : mic/line-45dBV
Input sensitivity : aux/line-10dBV
Signal to noise ratio : mic55dB
Signal to noise ratio : aux/line60dB
Dimensions482 x 130 x 44mm





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Weight 1.5 kg
Dimensions 57.2 × 21.4 × 8 cm