Alpine introduces the all-new X-Series of high-grade speakers and amplifiers. These products have been engineered and tuned to create a perfect match for extraordinarily dynamic, realistic sound reproduction and a spatial sound impression. The all-new X-Series amplifiers set a new standard for sound quality performance and power output in a very compact design. Available in mono, four channel and five channel configuration, these amps are a perfect match for the all-new X-Series speakers and subwoofers. Total Max Power: 1800W RMS Power (14.4V / 4 Ohms): 1 x 600W RMS Power (14.4V / 2 Ohms): 1 x 900W FEATURES Install Terminal Layout: One side Screw Mount / Wire Cover: Plug Type Connector (PWR and SPK Terminal) Mounting Design: Easy Stacking and Smart Installation General Amplifier Type: Class-D (Digital) Channel Design: Mono Thermal Control: Thermal Management Control Power Supply: PWM regulated Interleaved flyback with active clamp Board Circuitry: S.T.A.R. Circuitry Power Indicator: Top Mounted LED Power/Status Indicator Speaker Level Input with remote turn on Crossover: Adjustable Low-pass Filter (LPF) Built-in Bass EQ Subsonic Filter: Variable Subsonic Filter Gain Control: Adjustable Bass Control: Remote Bass Control (RUX-KNOB2) Ready SPECIFICATIONS Max Power Output Ratings Total Max Power: 1800W RMS Power Ratings Per Channel into 4ohms, 14.4V (≤1%THD+N): 600W Per Channel into 2ohms, 14.4V (≤1%THD+N): 900W Sound Tuning Subsonic Filter (Subwoofer): 8-40 Hz (-24dB/oct) Crossover Frequency (LPF): 50-400 Hz (-24dB/oct) Equalizer (Bass EQ): 0-12dB (Fc 50Hz, Q Factor 1.3) General Power Requirements: 14.4 V.DC (9 - 16 V allowable) Input Sensitivity (RCA Input): Hi: 0.4 - 10 V Lo: 0.1 - 4.0 V High Level Input with automatic power on Cable size: Power Cable 4AWG (20mm2), SPK Cable 8AWG (8mm2) Frequency Response (+0, -3dB: 1W into 4 ohms): 8-400Hz THD+N (10W into 4 ohms): 107dB Weight: 3.2 kg Dimensions Heat Sink (WxHxD) mm: 297 x 51 x 192