Behringer KM400 400W Stereo Professional Power Amplifier w/ ATR

Compact Stereo Power with Bridge Mode and Fast Transient Response

The Behringer KM400 is a professional stereo power amplifier designed for smaller PA systems, monitors, rehearsal rooms and installations. It delivers 2 × 190 W into 4 Ohms or 2 × 120 W into 8 Ohms, with bridge mode providing 400 W into 8 Ohms when you need to combine both channels to drive a single higher-powered load.

ATR, or Accelerated Transient Response, is designed to help the amplifier react quickly to sudden peaks in the signal, keeping drums, percussion and other dynamic material sounding punchy and defined. Zero-attack limiters help prevent overload while maintaining maximum usable output, with signal and clip LEDs providing clear visual level monitoring.

Balanced XLR inputs and twist-lock speaker outputs provide professional connectivity, while independent DC and short-circuit protection safeguards each channel. An efficient switch-mode power supply and front-to-back ventilation sit inside a rugged all-steel 2U rackmount chassis.

At Riffs & Licks Music, we think this stereo power amplifier is ideal for smaller live, rehearsal and installation systems that need reliable output, bridge-mode flexibility and built-in protection in a rackmount format.