kicker KXA1600.1. Shipping only within the United States by UPS for Puerto Rico USPS .New Open Box is in its original box with its advice. The box is damaged and will be sent by Ups ho Fedex Ground signature required. mono subwoofer amplifier 800 watts RMS x 1 at 4 ohms (1600 watts RMS x 1 at 2 ohms) 1600 watts RMS (+/-10%) x 1 at 1 ohm CEA-2006 compliant Class D amp technology gain knob also functions as clip light variable low-pass filter (40-160 Hz, 24 dB/octave) Kick EQ+ parametric bass boost (0-18 dB at 20-80 Hz with bandwidth adjustment 1-5) variable subsonic filter (10-80 Hz, 24 dB/octave) KXARC Bluetooth wireless remote controls: gain: 0 dB (no change) to -26 dB SHOCwave (Sub Harmonic Octave Creation) bass restoration phase: 0/180 clip LED indicator More Features: front-mounted controls protected behind fold-down door Fail-Safe Integration Technology eliminates noise from your vehicle's electrical system Radio Detect switch for receivers that need speaker loads on their outputs preamp and speaker-level inputs (speaker wire to RCA adapterrequired for speaker-level input)) preamp outputs wiring, fuse, and hardware not included with amplifier 1/0-gauge power and ground wires and a 150-amp fuse recommended 11-3/16"W x 2-3/16"H x 8-1/4"D PerformanceRMS Power Output (Watts x Channels)800 x 1 Peak Power Output (Watts x Channels)---Power at 2 Ohms (Watts x Channels)1600 x 1Bridged Power (Watts x Channels)N/AMinimum Impedance BridgedN/AMinimum Impedance Unbridged1Minimum Impedance1Best Frequency Response10-160 HzTHD at Rated RMS Power1%Signal to Noise Ratio75 dBInput Voltage14.4vFeaturesAmplifier ClassDLow-Pass Crossover Frequency40-160 HzLow-Pass Slope (dB/octave)24 dB/octaveHigh-Pass Crossover FrequencyN/AHigh-Pass Slope (dB/octave)N/ABass Boost0-18 dBBass Boost Frequency20-80 HzFan CooledNoFuse Rating150Speaker Level Inputs---Preamp Outputs1 pairWidth (inches)11-3/16Height (inches)2-3/16Depth (inches)8-1/4.9.    open box remains new and has never been installed.  Shipping by UPS Ground signature required for delivery.  Any questions before purchasing contact me.  For any return, the buyer pays return costs.  Yours should send everything the same as you received it.  Do not remove the serial number.Shipping by ups ground ho fedex signature required for delivery.  for any claim or return. Do not remove or alter the serial number.