Only 8kg/17.6lbs light, the K2 is the ideal companion for where space, weight, and uncompromised sound quality matter.

Per Step-up card a K2 can be upgraded to become a K3 – more power without replacing the entire amplifier. 
Click here to go to the K Series Step-Up page.

In use worldwide by leading touring and event sound 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 size.

Fully digitally controlled and with a serial PC communication port as standard, the K2 is also available with KDSP board and KAESOP Ethernet/AES3 interface: the K2 DSP+AESOPamounts 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 Armonía Pro Audio Suite™ (Interface available for MediaMatrixCrestronAMX, Q-SYS control and monitoring systems).

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 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 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 continous variable speed fan, front to back airflow
  • Temperature forecast with LCD traced historical behaviour


  • Fixed frequency switchmode output stage for high grade sound accuracy
  • Compact size – all models only 1 RU for reduced rack cost and space
  • Light weight – for easier racking and shipping: 8 – 12 kg (17.6 – 26.5 lbs) according to 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*

Number of channels 2
Output power Single channel mode   Bridge mode
2 Ω 4 Ω 8 Ω       4 Ω 8 Ω    
2400 W 1950 W 1000 W       4800W 3900W    
Max output voltage / current 140 Vpeak / 102 Apeak 100 Vpeak 140 Vpeak 280 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 consuption** 115 V 230 V
Idle 69 W 1.2 A 88 W 1.35 A
1/8 of max output power @ 4 Ω 609 W 6.3 A 609 W 3.1 A
1/4 of max output power @ 4 Ω 1219 W 11.4 A 1219 W 5.7 A
Operating temperature range 0° – 45° C – 32° – 113° F
Thermal dissipation** 115 V 230 V
Idle 382 BTU/h 96.3 kcal/h 382 BTU/h 96.3 kcal/h
1/8 of max output power @ 4 Ω 722 BTU/h 181.9 kcal/h 722 BTU/h 181.9 kcal/h
1/4 of max output power @ 4 Ω 1062 BTU/h 267.6 kcal/h 1062 BTU/h 267.6 kcal/h
Gain 26 dB 29 dB 32 dB 35 dB
Input sensitivity 4.48 V 3.17 V 2.47 V 1.59 V
Max input level 27 dBu 24 dBu 21 dBu 18 dBu
Gate -52 dBu -55 dBu -58 dBu -61 dBu
Frequency response 20 Hz – 20 kHz (±0.5 dB) @ 1 W, 8 Ω
S/N ratio > 106 dB (20 Hz – 20 kHz, A weighted)
Crosstalk separation > 70 dB @ 1kHz
THD+N < 0.2% from 1 W to full power (typically < 0.05%)
IMD < 0.2% from 1 W to full power (typically < 0.05%)
Input impedance 10 kΩ balanced
Slew rate 50 V/μs @ 8Ω, input filter bypassed
Damping factor > 5000 @ 20-200 Hz
DSP architecture Analog Devices SHARC® DSP
AD Converter Dual 24 bit 96 kHz Tandem® architecture with 127 dBA of dynamic range and THD
DA Converter Dual 24 bit 96 kHz Tandem® architecture with 122 dBA of dynamic range and THD
Internal precision 40 bit floating point
Firmware Network upgradable firmware
Memory/presets 8 MB (RAM) plus 2 MB flash for presets / 50 stored locally + 150 stored on Smart Card
Latency 6.0 ms fixed latency architecture
Input equalizer Three layers (PEQ, raised cosine, shelving), 32 filters each + group filters, up to 256 filters total
Output equalizer 16 fully parametric filters per channel, IIR: peaking, hi/lo-shelving, hi/lo-pass, band-pass, band-stop, all-pass. Custom FIR up to 384 taps @ 48 or 96 kHz
Crossover Butterworth, Linkwitz-Riley, Bessel or arbitrary asimmetric: 6 dB/oct to 48 dB/oct (IIR), linear phase (FIR), hybrid (FIR-IIR)
Delay up to 4 s on input section; up to 32 ms per output, sample-by-sample stepping
Limiters Power limiter, TruePower™, RMS voltage, RMS current + Peak limiter
Damping control Active DampingControl™
Front panel
Indicators and Controllers 2 x LED bar – Signal level and over-temperature protection
4 x Push-button – Setting operating parameters
1 x Display – Settings and monitoring
1 x Power switch – 
AC main 1 x IEC C20 connector – 20 A max (region-specific power cord provided)
Audio signal input 2 x XLR – Signal input
1 x Analog/Digital input – Switchable Analog line/AES3 digital input on channel 2
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 2 x Rj45 socket – Ethernet + AESOP connection (DSP+AESOP version only)
2 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
1 x Push-button – Toggle ANALOG input/AES3 input on selected connector
Dimensions (L x H x W) 483 mm x 44.45 mm x 380 mm (19.0 in x 1.8 in x 15.0 in)


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