Sundown Audio SALT 2k Class D Amplifier 4000 x 1 @ 2 ohms RMS (when linked) 2000 x 1 @ 1 ohms RMS mono 1000 x 1 @ 2 ohms RMS mono 500 x 1 @ 4 ohms RMS mono Variable bass boost @ 45Hz 0-9dB 24dB variable subsonic filter: 10HZ - 50HZ 24dB variable low pass filter: 35HZ - 250HZ Phase shift control 0-180 degrees Power, clipping & protection indicators included Thermal, voltage, speaker short, and dc-offset protection circuitry Included wired remote control displays voltage, temperature, and clipping Producing optimum power at realistic voltages (the 12s, rather than needing 14+ volts), the SALT – Sundown Audio Low-Voltage Technology – is Sundown’s answer! SALT amplifiers represent the pinnacle of Korean Class-D amplifier technology. Whether you are a world-class SPL competitor or a hardcore sound quality fan, the SALT series will be right at home in your system Sundown Audio SALT-1 Class D Amplifier . Features Digital Class-D Linkable Mono Block Amplifier Dual MOS-FET PWM Power Supply 1 Ohm Stable Load 24 dB/Octave – Variable Low Pass Filter 24 dB/Octave – Variable Subsonic Filter 9 dB/Octave – Variable Bass Boost 180° Variable Phase Shift 4 Way Protection Ciruit (Thermal, Voltage, Speaker Short, DC Offset) Wired Remote Control with Voltage & Temperature Display and Clipping Indicator Specifications Input Sensitivity : 6V - 0.2V 4000 x 1 @ 2 ohms RMS Linked 2000 x 1 @ 1 ohms RMS Mono 1000 x 1 @ 2 ohms RMS Mono 500 x 1 @ 4 ohms RMS Mono Variable Subsonic Crossover Filter : 10HZ - 50HZ Variable Low Pass Filter : 35HZ - 250HZ Bass Boost @ 45Hz 0-9dB Efficiency : 90% < Signal / Noise Ratio : 90DB < Damping Factor : 400 < Frequency Response : 10 Hz – 250 HZ Phase Shift Control 0-180 Degrees Tested Voltage & THD : 12.8V & Less Than 1% THD Operation Voltage : DC 9V - 15.5V Power Input Recommended Fuse : 200 Amps Dimensions : 15.74” L x 8.67” W x 2.80” H