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The Niles SI-2150 is a powerful 2-channel bridgeable power amplifier designed for custom-installed A/V systems. Delivering high current power with exceptional stability and clarity, it offers 150W per channel and up to 550W when bridged, making it ideal for demanding home theatre setups. Key Features Digital, high current bridgeable stereo amplifier 150 Watts RMS per channel into 8 Ohms (all channels driven) 270 Watts RMS per channel into 4 Ohms (all channels driven) Channels bridgeable to 550 Watts RMS into 8 Ohms Auto-switching 110V-230V power supply Three turn-on modes: Music Sense, Voltage Trigger, and Manual Voltage trigger input accepts 3-24VAC/DC Audio circuitry constructed with 1% metal film resistors, high-quality capacitors, and oversized heat sinks for clear, uncoloured sound Independent level controls for easy installation and adjustment Specifications 12-volt control output Removable line cord Rack mount ears included Tested and certified to US, Canada, EU, and Australian safety and EMC standards Overall dimensions: 17.25" (43.81 cm) wide × 2.25" (5.6 cm) high (including feet) × 13.5" (34.35 cm) deep Weight: 10.8 lb (4.9 kg) Warranty 2 year limited warranty included.