nullGM-D9500F12V4500W Car AudioStereoPowerAmplifier4 ChannelClass A/B 3D Stereo Surround SubwooferFeatures:* 4-Channel 4500 Watt Car Power Amplifier* Amplifier Class: Class A/B* 3D Stereo surround* Main push 4/2 speaker* Passive subwoofer* Slim design* Aluminium alloy casting drawing process* External heat sink* Thermal OverloadSpeaker's Short ProtectionSpecifications:Model: GM-D9500FMaterial: Aluminium alloyChannel: 4 ChannelWorking Voltage:DC 10-16VPeak Power Output: 4500WTotal Harmonic Distortion (THD) RMS Output: <0.1%Gain bass: 0-12dbSignal-to-Noise Ratio (SNR): 0-12dBSensitivity: 150mVImpedance: 2Ω~4ΩFrequency: 20Hz~20KHzSize: 358*215*56mm/14.1*8.5*2.2inNote:1. Please allow 0.5-1cm differences due to manual measurement.2. Due to the light and screen difference, the item's color may be slightly different from the pictures.Package Included:1 x 4500W Car Audio Amplifier1 x User Manual