Pure Resonance Audio LA21000 1000W 2-Channel Stereo Power Amplifier

The Pure Resonance Audio LA21000 is a high power 2 channel stereo amplifier designed for professional and commercial audio systems requiring strong output and reliable performance. Delivering up to 1000 watts per channel into 4 ohms, this 1U rack mount amplifier provides clean, efficient, and consistent power for large installations or demanding live sound applications.

Featuring Class D amplification technology and a switched mode power supply, the LA21000 combines lightweight construction with high efficiency and low heat output. It supports stereo, mono, and bridge operation modes, making it adaptable for different system designs and configurations. Ideal for auditoriums, clubs, houses of worship, and event spaces, it offers power and precision in a compact form factor.

Built for dependable performance, the LA21000 includes professional XLR inputs, link outputs, and SpeakON NL4 connectors for secure speaker connections. It also features full protection circuitry for short circuit, overload, DC, and over temperature events, along with front panel indicators for signal, clip, and protection status. Fan forced cooling ensures stable operation even under continuous load conditions.

Key Features

• High Power Output: Delivers 1000 watts per channel at 4 ohms and 700 watts per channel at 8 ohms.
• Flexible Operation: Stereo, mono, or bridge modes for maximum installation versatility.
• Efficient Class D Design: Reduced power loss and lower heat generation for long term reliability.
• Comprehensive Protection: Includes short circuit, overload, DC, and over temperature safeguards.
• Professional Connectivity: Balanced XLR inputs, link outputs, and SpeakON NL4 speaker connectors.

Technical Specifications

• Output Power (Stereo): 2 x 1000W at 4 Ohms, 2 x 700W at 8 Ohms
• Output Power (Bridge): 2000W at 8 Ohms, 1400W at 16 Ohms
• Input Impedance: 10 kOhms unbalanced, 20 kOhms balanced
• Voltage Gain: 37.5 dB at 1 kHz
• Frequency Response: 20 Hz - 20 kHz (+/-1 dB)
• Signal to Noise Ratio: 95 dB or greater
• Total Harmonic Distortion: Less than 0.05 percent at 1 kHz
• Cooling: Fan forced cooling
• Protection Circuits: Short circuit, DC, overload, and over temperature
• Power Supply: 110 to 120V AC, 60 Hz
• Dimensions (H x W x D): 1.73 x 19.06 x 10.04 Inches
• Weight: 11.24 lbs (4.9 kg)