Specifications: This is a multi-channel car amplifier for your reference. This series have 4 amplifiers:1-channel amp(US-168P),2-channel amp(US-268P),4-channel amp(US-468P),6-channel amp(US-668P). All of them are with a same style. 6-channel Power Amplifier Operating Voltage: DC 14.4V RMS Power at 4 ohms:70w*6ch T. H. D.: RMS Power at 2 ohms:88w*6ch T. H. D.: Maxpower at 4 ohms:280w*4ch Bridged RMS Power at 4 ohms:260w*1ch T. H. D.: HP frequency:50Hz--5KHz LP frequency:35Hz--260Hz Input Level:200mv-4.5v S/N Ratio: >=95db Measurement:410*239*61mm If you are interested in them, pls kindly contact me