Description:100% brand new and .Feature:Using TAS5630, components to ensure its stability.Using 470UF/100Vx4 NICHICON capacitor as its main filter electrolysis capacitor, which can provide continuous driving support.Using fully shielded high-current inductors, to ensure crisp and powerful sound.With 5-loop mental resistors and metal film resistors(1% precision) in the main circuit, the product achieves an excellent SNR.With the full-screening large current inductance, its sound will be clearer and more powerful.Using 1.6mm thick two sides board, 2.0 oz copper thickness, tin plated workmanship to build the high-quality PCB, which ensures its current conveyance performance.Specifications:Item Type: Amplifier BoardWorking mode: D typeQuiescent current: 65mAEfficiency: 88%Output power: 300W+2x150W/4 euro 10% THDFrequency response: 20Hz to 20KHzDynamic range: greater than 100 dBSignal to noise ratio (A-Weighted): 100dBWorking voltage: DC48VMaterial: Matel+PlasticSize: 170x96x43mm/6.6x3.7x1.6inColor: As shownQuantity: 1 PcPotentiometer function: (from left to right )1.Subwoofer volume.2.Left and right channel treble.3.The volume of the left and right channels.4.The total volume.Note:Transition: 1cm=10mm=0.39inchPlease allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!Package Includes:1 x Amplifier Board1 x Some Accessories