The future of sound Made perfectly clear

The Kingdom of Perfectly Clear Sound


The Kingdom of Perfectly Clear Sound

ESP 4000



​The ESP 4000 is an ultra high definition 4 channel rack mountable power amplifier from KV2 Audio, specifically designed for optimised performance with ESD loudspeakers, as well as with other passive systems. For the ESP 4000 all electronic circuit boards are first mounted on individual aluminium heat sinks, then on a secondary, internally sealed chassis, this leaves only the heatsink fins exposed. Two separate power supplies ensure increased reliability and continuous delivery of full power. Two shock mounted fans move air across the fins but never directly across the electronic components. This minimises maintenance cycles and improves the components lifespan and and reliability. The ESP 4000 is housed in a professional 4U road rugged steel metal case with aluminium handles and evenly distributed weight.​


  • Very high quality fixed installations.
  • Professional portable PA Systems for large format AV, speech and multimedia playback.
  • Live music applications.
  • Professional Mobile DJ with passive loudspeaker systems.
  • Very high quality studio monitors.​


System Acoustic Performance

-1dB Response​ 3Hz ÷ 40kHz
Channel Crosstalk​ >60dB
Signal to Noise Ratio​ >115dB
Total Harmonic <0.005% (1W) / <0.01%
Distortion (clip -1dB)

Output Channels

Amplifier Type​  High Efficiency, Emitter coupled
Number of Channels​  4
Total Output Power​  4000W
Max. Output Voltage  78V (peak)​
Max. Output Current​  48A (peak)​
Minimum load impedance per channel​  2Ω​
Out. Power 16Ω – 1 channel / 2 channels loaded  175W / 160W (RMS)​
Out. Power 8Ω – 1 channel / 2 channels loaded​  340W / 300W (RMS)​
Out. Power 4Ω – 1 channel / 2 channels loaded  600W / 500W (RMS)​
Out. Power 2Ω – 1 channel / 2 channels loaded​  1000W / 800W (RMS)​
Out. Power 16Ω – bridged​  600W (RMS)​
Out. Power 8Ω – bridged​  1000W (RMS)​
Out. Power 4Ω – bridged​  1600W (RMS)

Signal Input​

Input Channels​ XLR​
Input Sensitivity​ 1.55V​
Input Impedance​ 20kΩ (balanced)​
Input Impedance​ XLR Through​

Speaker Output

Speaker Output​ – / 4x Binding posts, Neutrik Speakon®


Level Control​ -∞ ÷ 0dB​
Subwoofer Level Control​ +6dB @ 60Hz​
RMS Limiter​ On / Off​
Indicators​ Power ON/Thermal, Signal/Limiter​


Power Connector​ 2x Neutrik PowerCon®
Operating Voltage​ 115V / 230V / 250V
Operating Voltage 100÷120V@60Hz |
Range​ 205÷240V@50Hz | 225÷260V@50Hz
Recommended 2x20A 115V | 2x10A
Amperage​ 230V | 2x10A 250V
Soft Start​ YES​
Protection​ Thermal breaker​
Cooling​ 2x temperature controlled fan