Delivery Information

Shipped direct from manufacturer. Usually 2-3 day delivery.

Powersoft M20D

24 monthly payments of
£57.02 EACH

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Like all M Series models, the M20D is an outstanding value in any smaller to medium sized sound system where an efficient, compact and good sounding amplifier is expected to work reliably over a long period. Since 2Ω-capability is usually not needed in smaller systems, the M20D is properly dimensioned with its 4Ω optimization.

In use worldwide by leading touring and event sound companies, Powersoft amplifiers are preferred among the top ranking system designers, sound engineers, and contractors for providing reliable premier-grade power and headroom in the smallest possible package size.

Alternatively, the M20D can drive constant voltage 70V lines directly where multiple loudspeakers are required.

Maximum efficiency warrants minimum current draw, heat dissipation and power consumption, resulting in "green" products, saving the user a substantial amount of money over time.


Power supply

  • Advanced switch-mode power supply technology for high performance and compact size
  • Fixed frequency switch mode output
  • Patented output filter with ripple cancellation network

Fully protected circuit design with:

  • Ac protection: shut down power supply when AC mains voltage is outside operating range
  • Clip limiter: prevents severely clipped waveforms from reaching loudspeakers, while still maintaining full peak power output
  • DC protection: protects against infrasonic signal at the outputs
  • VHF protections: protects the loudspeakers against non audible, strong, non musical high frequency signals
  • Short circuit protection: protects the amplifier from short circuit or other stressful events for the output circuits with automatic protection reset
  • Long term limiter: protects the loudspeaker against steady long term rms (non audio) signals reducing maximum output
  • Thermal protection: output stages operating temperature up to 75 °C (167 °F)
  • Temperature controlled continous variable speed fan, front to back airflow


  • Direct drive constant voltage, 70V Hi-Z distributed lines**
  • Compact size - all models only 1 RU for reduced rack cost and space
  • Light weight - all models only 7.4 kg (16 pounds) for easier racking and shipping
  • Neutrik XLR balanced inputs with loop thru XLR and Speakon outputs connectors
  • Recessed stepped attenuators
  • Modular construction
  • Full four years warranty


Number of channels 2
Output power Single channel mode Distributed line* Bridge mode
    4 Ω 8 Ω   70V     8 Ω    
    1200 W 600 W   1200 W     2400W    
Max output voltage / current 116 Vpeak / 65 Apeak 100 Vpeak   232 Vpeak
AC Main Power  
Power supply Universal, regulated switch mode
Nominal power requirement 100-240 V ±10%, 50-60 Hz
Operating voltage 90 V - 264 V
Power consuption** 115 V   230 V
Idle 35 W 0.6 A   35 W 0.3 A
1/8 of max output power @ 4 Ω 371 W 5 A   371 W 2.54 A
1/4 of max output power @ 4 Ω 701 W 9 A   701 W 4.5 A
Operating temperature range 0° - 45° C - 32° - 113° F
Thermal dissipation** 115 V   230 V
Idle 126 BTU/h 31.8 kcal/h   126 BTU/h 31.8 kcal/h
1/8 of max output power @ 4 Ω 529 BTU/h 133.3 kcal/h   529 BTU/h 133.3 kcal/h
1/4 of max output power @ 4 Ω 935 BTU/h 235.6 kcal/h   935 BTU/h 235.6 kcal/h
Gain 32dB, 30dB, 28dB, 26dB, 24dB, 22dB, 20dB, 18dB, 14dB, 4dB, -∞, user selectable
Input sensitivity 1.7 V / 7 dBu
Max input level 6 V / 17.7 dBu
Frequency response 20 Hz - 20 kHz (±0.5 dB) @ 1 W, 8 Ω
S/N ratio > 107 dB (20 Hz - 20 kHz, A weighted)
Crosstalk separation > 70 dB @ 1kHz
THD+N 0.05% @ 1/2 full power
IMD 0.02%
Input impedance 10 kΩ balanced
Slew rate 40 V/μs @ 8Ω, input filter bypassed
Damping factor > 5000 @ 100 Hz
Front panel  
Indicators and Controllers 1 x LED - Status
1 x LED - Over-temperature protection
2 x LED bar - Signal level + CLIP
2 x Knob - Level attenuator (stepped)
1 x Power switch - 
AC main 1 x IEC C14 connector - 15 A max (region-specific power cord provided)
Audio signal input 2 x XLR - Signal input
Auxiliary voltage 1 x 2 pin Phoenix MC 1.5/2-ST-3.81 - External voltage connector (DSP version only)
Audio out (link through) 2 x XLR - Signal output (link through)
Loudspeakers 2 x speakON - Neutrik NL4MD
Network/data 1 x Rj45 socket - Ethernet + AESOP connection (DSP+AESOP version only)
1 x Rj45 socket - RS485 data connection (non-DSP version)
Rear panel  
Indicators and Controllers 1 x Push-button - Link channel pair
Dimensions (L x H x W) 483 mm x 44.45 mm x 358 mm (19.0 in x 1.8 in x 14.1 in)
Weight 7.4 kg (16.3 lb)

* Data is suject to change without notice.


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