The Kalmus LA500H is a high-performance stereo power amplifier designed for professional audio environments and sophisticated home audio systems. It delivers 300 W RMS per channel into 8 ohms, scaling to 500 W RMS into 4 ohms, with mono bridged capability reaching 750 W RMS into 8 ohms. The amplifier combines low distortion performance—THD below 0.01% and IMD below 0.005%—with a signal-to-noise ratio exceeding 115 dB (A-weighted) and damping factor greater than 200 at 50 Hz. All-metal chassis construction with variable-speed cooling and comprehensive protection circuitry ensures reliable operation across demanding audio applications.
## Technical Specifications
• **Model:** Kalmus LA500H
• **Amplifier Type:** High-performance Stereo Power Amplifier
• **Frequency Response:** 20 Hz – 20 kHz ± 0.2 dB (at rated output into 8 ohms)
• **Power Bandwidth:** 10 Hz – 100 kHz (at 0.1% THD, into 8 ohms)
• **Total Harmonic Distortion (THD):** Less than 0.01% (20 Hz – 20 kHz, at 1 W into 8 ohms)
• **Intermodulation Distortion (IMD):** Less than 0.005% (SMPTE, at 1 W into 8 ohms)
• **Signal-to-Noise Ratio:** Greater than 115 dB (A-weighted, at 1 W into 8 ohms)
• **Damping Factor:** Greater than 200 (at 50 Hz, 8 ohm load)
• **Slew Rate:** 30 V/µs
• **Rise Time:** 1.5 µs
## Key Features
• **Output Power:** 300 W RMS per channel (8 ohms, stereo); 500 W RMS per channel (4 ohms, stereo); 750 W RMS mono (bridged, 8 ohms)
• **Input Options:** XLR (balanced, 100 kOhms) and RCA (unbalanced, 50 kOhms)
• **Input Sensitivity:** 1.4 V RMS for full output (into 8 ohms)
• **Protection:** Thermal monitoring, short-circuit protection, DC offset protection
• **Cooling:** Variable-speed fan with front-to-back airflow
• **Remote Control:** 12V trigger input (3.5 mm mini-jack)
• **Power Consumption:** Idle ≈50 W; full power ≈500 W per channel; standby <5 W
• **Indicators:** Power, signal, clip, and protection LEDs (per channel)
## Typical Applications
Professional audio installations, venue sound reinforcement, high-fidelity home theater, and studio monitoring systems requiring sustained high-output capability with minimal distortion.
## Compatibility & Integration
Standard 19-inch rack-mount width (483 mm) with binding post outputs accepting banana plugs, spade connectors, and bare wire. AC power options: 100–120 VAC or 220–240 VAC, 50/60 Hz. Weight: 20.4 kg.
