2-Channel High Performance Power Amplifier

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The K20 impresses with up to 18,000 W in single rack space, making it probably the most powerful amplifier at its size.

Ideal for subwoofers requiring relatively high continuous power and ample headroom, the K20 is the unique result of smart design, attention to sound quality, and extremely high efficiency with reliability, portability, and adaptability in mind.

In use worldwide by leading touring and event companies, K Series is preferred among the top ranking system designers, sound engineers, and system techs on the road for making their lives easier, giving them reliable premier-grade power and headroom in the smallest possible package.

Fully digitally controlled and with a serial PC communication port as standard, the K20 DSP+AESOP amounts to a fully integrated, highly sophisticated yet easy to use power source. Including state-of-the-art sound shaping and system management capabilities, remotely controllable via Powersoft's ArmoníaPlus.

MyPowersoft services are available for this product


Power supply

  • Advanced switch-mode worldwide operating power supply technology for high performance and compact size
  • Power Factor Correction PFC for extremely low mains consumption and extremely wide mains operating a range
  • Low Inrush Limiting reduces AC inrush current, removing the need for expensive power sequencers


Fully protected circuit design with:
  • Ac protection: shut down power supply when AC mains voltage is outside the 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 80 °C (176 °F)
  • Temperature controlled continuous variable speed fan, front to back airflow
  • Temperature forecast with LCD traced historical behavior


  • Fixed frequency switchmode output stage for high-grade sound accuracy
  • Compact size - all models only 1 RU for reduced rack cost and space
  • Lightweight - for easier racking and shipping: 12 kg (26.5 lbs) according to the configuration
  • Combo XLR/6.3mm jack Neutrik input connectors with link capability
  • AES3 digital input


  • LCD matrix interactive display
  • Comprehensive-user friendly front panel display menu
  • Built-in defeatable clip limiters for each channel
  • Digital gain-attenuator control
  • Defeatable gate selection for each channel
  • User-selectable gain/sensitivity
  • User-selectable maximum output power for each channel
  • User-selectable maximum mains current draw
  • Lockable set-up by user selectable access key code
  • Built-in remote control via the RS-485 interface provides full diagnostic, operational setting, and system monitoring


  • Hardware monitor available for fast local diagnostic
  • Load impedance measurement/display for each channel
  • Output power measurements/display for each channel
  • Mains voltage and current measurements/display
  • Downloadable log file of functional fault events with time-related trace
  • Smart Card settings, parameters, and upgrades functionality

Digital Signal Processing

  • Analog Devices SHARC® DSP architecture
  • AD/DA converter: dual 24bit @ 96 kHz Tandem® architecture, 127 dB dynamic range, per channel
  • Input/output independent equalizers per channel providing PEQ, raised cosine, shelving IIR filters as well as custom output FIR filters
  • Delay up to 1 s for time alignment
  • Active DampingControl™ for cable compensation
  • Power limiter (TruePower™, RMS voltage, RMS current) + Peak Limiter

Remote management

  • Control and monitoring through ArmoníaPlus
  • Interface available for MediaMatrix, Crestron, AMXcontrol, Q-SYS and monitoring systems


Output power per channel
Output power per channel 9000 W @ 2 Ω 5200 W @ 4 Ω 2700 W @ 8 Ω
Bridge mode 18000 W @ 4 Ω 10400 W @ 8 Ω
Max output voltage / current
Single channel mode 1225 Vpeak / 125 Apeak
Bridge mode 450 Vpeak
AC main power
Power supply Universal, regulated switch mode with PFC (Power Factor Correction)
Nominal power requirement 100-240 V ±10%, 50-60 Hz
Operating voltage 90 V – 264 V
Power consumption / current draw
Idle 115 V: 91 W – 1.3 A 230 V: 88 W – 1.17 A
1/8 of max output power @ 4 Ω 115 V: 1650 W – 15.8 A 230 V: 1625 W – 7.9 A
1/4 of max output power @ 4 Ω 115 V: 3250 W – 29.3 A 230 V: 3250 W – 14.7 A
Operating temperature range 0° – 45° C – 32° – 113° F
Thermal dissipation*
Idle 115 V: 682 BTU/h – 171.9 kcal/h 230 V: 682 BTU/h – 171.9 kcal/h
1/8 of max output power @ 4 Ω 115 V: 1590 BTU/h – 400.7 kcal/h 230 V: 1590 BTU/h – 400.7 kcal/h
1/4 of max output power @ 4 Ω 115 V: 2498 BTU/h – 629.5 kcal/h 230 V: 2498 BTU/h – 629.5 kcal/h

Applications examples

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