Orion Monoblock Amplifier 4 Ohm XTR series XTR1500.1DZ This amplifier is manufactured by Orion and is part of their XTR series.  This amplifier is a Class D mono channel amplifier with an RMS Power @ 1 ohm of 1500 Watts.  It has a sleek rugged design that is sure to give your system a great look.   Specifications  RMS Power @ 4 Ohms MONO @ 0.5% THD+N: 600 Watts  RMS Power @ 2 Ohms MONO @ 0.5% THD+N: 975 Watts  RMS Power @ 1 Ohms MONO @ 0.5% THD+N: 1500 Watts  12dB/Octave Low-Pass Filter  Frequency Response: 20Hz to 250Hz  Low Pass Crossover: 30Hz~250Hz  Signal to Noise Ratio: >65dB  THD at 1 Watt, 4 Ohm: 70 dBA (reference 1 Watt into 4 ohms)  Additional Power: 1500 Watts RMS x 1 at 1 ohm and  XTR AMPLIFIERS: Built on a reputation of quality and reliability, these amplifiers embody the true meaning of power and performance. Housed in a sleek heatsink, loaded with features, and packing an extremely powerful punch for their size, XTR amplifiers stay true to the Orion legacy of cracked windshields and punishing SPL! FEATURES: The XTR1500.1DZ offers technical power and performance with its 4-way protection circuitry and adjustable input sensitivity control. A Subsonic filter control eliminates low-end distortion, while the adjustable bass boost control and phase shift control give you the ability to customize your sound. Enjoy maximum wattage with unbeatable protection. HIGH POWER: Bring the power of thunder to your car audio systems with the XTR1500.1D amplifier. Boasting 1500W RMS, this XTR Series amp is 1-Ohm stable for maximum output. Challenge yourself with risk-taking bass SPECS: The XTR1500.1DZ from the XTR Series is a monoblock amplifier with an impressive signal to noise ratio of 90dB and a wide frequency response of 15Hz to 250Hz. It offers a variable low pass crossover for precise tuning, 12db/octave low pass filter, and a 0-18dB bass boost with phase shift control. Ideal for producing excellent sound quality and powerful strong bass. DIMENSIONS: 11.5 x 9.3 x 2.5 (292.1mm x 236.22mm x 63.5mm). MADE IN KOREA