Digital Amplifier KRS-A300

A compact 1U Class D amplifier delivering up to 2×450W, featuring PFC, anti-clipping tech, selectable low impedance/70V modes, and full protection circuits. Includes XLR I/O, NL4 outputs, and efficient cooling with variable-speed fan.
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Description
  • Standard 1U-height chassis, compact and lightweight design.
  • Class D amplifier module with fixed switching frequency and LLC resonant soft-switching power supply module.
  • Active Power Factor Correction (PFC) technology with high-efficiency back electromotive force absorption system for speakers.
  • Unique limiter and anti-clipping technology ensures distortion-free output.
  • Temperature-controlled variable speed fan with front-to-rear airflow design.
  • Selectable operation modes: low impedance (stereo) / constant voltage (70V), with built-in high-pass filter switch and circuit.
  • Comprehensive circuit protection: soft start, DC, overheat, short circuit, and startup/shutdown mute.
  • Two XLR signal inputs and two XLR link outputs for easy multi-unit connection.
  • NL4 output connectors.
Parameter
Item Specification
Output Power 2 × 300W @ 8Ω; 2 × 450W @ 4Ω; Bridge 600W @ 16Ω
Total Harmonic Distortion < 0.05%
Signal-to-Noise Ratio > 100dB
Input Impedance 20kΩ (Balanced) / 10kΩ (Unbalanced)
Slew Rate > 20V/μs
Damping Factor > 220
Channel Separation > 65dB
High-Pass Filter 24dB/octave @ 300Hz
Frequency Response 25Hz – 20kHz ±0.5dB (8Ω, 1/8 rated power)
Input Sensitivity 0.775V – 1.5V
Operating Voltage 115V / 230V (switchable), 50/60Hz
Product Dimensions (W×D×H) 483 × 213 × 44 mm
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KRS-A300
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