Adastra RM240D Mixer Amplifier with DAB+ and Bluetooth

SKU: 953.225

£260.68 + VAT    £312.82 incl. VAT

240w into 100v line or 4-8Ω low impedance mixer amplifier with DAB+, Bluetooth & media player

2 in stock

Radio DAB+
Radio FM
USB Type A
100V Line
Low Impedance 4 Ohms
Low Impedance 8 Ohms
Low Impedance 16 Ohms



Adastra RM240D 240w 5 channel 100v line mixer amplifier with DAB+, Bluetooth and USB/SD

5-channel 19″ rack-mountable mixer-amplifier, tailored to commercial sound installations to power 100V line speakers or standard speakers down to a 4 Ohm load. Input options include XLR (with switchable phantom power), mic/line jack, and RCA line. Features an inbuilt DAB+/FM radio tuner, front-mounted SD/USB ports, and Bluetooth® connectivity, all controlled via an integrated media player for hassle-free playback. A switchable ‘voiceover’ feature automatically lowers the background music volume when a signal is detected via mic input 1 and rear panel 24V contacts can mute all except mic input 1 when triggered. Outputs on screw terminla are via 4 switchable zones with a separate “always on” output for priority alert speakers.

  • Do not connect more that two 8Ω loudspeakers to the 8Ω output of this amplifier
  • DAB+/FM radio tuner – aerial not included
  • Bluetooth receiver with unique serial ID
  • USB/SD audio player
  • 4 switchable 100V outputs and 1 unswitched output
  • Optional 4-16 Ohm output
  • XLR input with switchable +20V phantom power
  • 2 x mic/line inputs, 2 x RCA line inputs, 1 x RCA line output
  • Switchable VOX voiceover feature
  • 2U 19″ rack mountable (rack ears supplied)
  • 24V emergency mute contacts
  • Mains 230Vac or 24Vdc power option
  • Power supply: 170-264Vac, 50Hz (IEC)
  • DC power: 24Vdc (screw terminals)
  • Inputs: Mic XLR, 2 x mic/line jack, 2 x RCA line
  • Input sensitivity : mic 1 (balanced): -53dBV
  • Input impedance : mic 1: 5k Ohms
  • Input sensitivity : line (unbalanced): -15dBV (-18.5dBV line 5)
  • Input impedance : inputs 2-5: 1k Ohms
  • Line output: RCA
  • Speaker outputs: 4 switched + 1 non-switched 100V / 4-16 Ohms / COM
  • Controls: Mic1, mic/line2+3, line4+5, bass, treble, master volume
  • Equaliser : bass: 100Hz ±10dB
  • Equaliser : treble: 10kHz ±10dB
  • Rear panel switches: Phantom, Vox, Mic/Line (2 + 3)
  • Phantom power: +20V (mic 1 XLR, switchable)
  • Audio source: DAB+/FM tuner, USB/SD player, Bluetooth receiver
  • Emergency control: 24V contacts – mute all except Mic.1 when triggered
  • Bluetooth version: 5.0
  • THD: <1.0%
  • Output power : rms: 240W
  • Fuse: T5A
  • Dimensions: 433 x 320 x 88mm
  • Weight: 7.37kg

See the ‘User Manuals’ tab on the left of this page – as manufacturers are making instruction sheets and user manuals available for download only and your purchase may not include a printed version.

Additional information

Weight7.37 kg
Dimensions32 × 43.3 × 8.8 cm
Output (RMS)


Media Playback

Bluetooth, DAB+ Radio, SD Card Slot, USB (Type A) Slot


3 Pin XLR (Female), RCA Phono







Adastra was founded in 1949 and has earned a reputation for high quality public address sound products. Meeting the needs of the commercial PA sector for over 60 years the Adastra name is known for quality and value. Adastra is the choice for 100v line PA sound, zone paging PA and induction loop equipment. The Adastra range includes mixer & slave amplifiers, ceiling, cabinet & horn loudspeakers, desk paging & handheld microphones, equipment racks, cables, stands and accessories. Our professional and commercial sound products, wireless microphones and induction loops are carefully chosen for sale on our website by Sound Services – not everything from every manufacturer is there. Based on feedback, customer reviews and our own observations we list items that are popular, reliable and good value for money. If there are products not shown on our website that you feel we may be able to quote for, please just ask!

User Manuals

What's in the Box?

  • RMD series 100V mixer amplifier
  • Rack-mounting ears & hardware
  • IEC power lead(s)


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