Arc Audio X2 850.5 Multi-Channel Amplifier (5-Channels) Multi-Channel Amplifier (5-Channels) Microprocessor Class-D Design Designed And Engineered By Robert Zeff High-Frequency Power Supply Design For Improved Signal Transparency And Overall Sound Quality) Level 1 X2 Cosmetics Package - Texture Coated Stamped Steel Cosmetic Cover With Aluminum Logo Badge. (Changable to Level-2 XDi Cosmetics) Single Side Connection Design Full-Range Design Nickel Plated RCA Terminals Quick Disconnect Speaker Terminal Plugs Audiophile Class-D Output Filter Networks Detailed Micro Processor Controlled Protection Large, High-Frequency Switching Power Supplies RCA Inputs Are Compatible With Speaker Level Inputs Fault Codes Storage Of The Last Protection Code Detected High Signal To Noise Ratio Without Compromising Power Output Fully Balanced Input Stage Significantly Increases Flexibility Ultra-Low ESR, High-capacity Power Supply Storage Capacitors Flexible Mounting Orientation For Vertical Or Horizontal Installations Next Generation High-Speed Class-D Technology Powering All XDi Amplifiers. Bridged Mode Auto Detect Turn-On Works With Most Chip Based OEM Head Units Precision Filtering Isolates The Power Supply Reducing Unwanted Interference In Radio Reception Block Type Terminal Connections Specifications - 4-Channels @ 4 Ohms (Ch 1-4) - 85 Watts 4-Channels @ 2 Ohms (Ch 1 - 4) - 125 Watts 2-Channel @ 4 Ohms (Ch 1-4 Bridged) - 250 Watts 1-Channel @ 4 Ohms (Ch 5) - 225 Watts 1-Channel @ 2-Ohms (Ch 5) - 400 Watts Frequency Response - 20Hz - 20kHz Crossover Range (Ch 1-4) - 50Hz - 550Hz Crossover Range (Ch 5) - 30Hz - 230Hz Bandpass Capable - No Bass Boost - Variable 0-12 dB @ 45Hz Cosmetic Trim - XDi Trim Level 1 Remote Level Control Included - Yes Input Sensitivity (Low) - 200mV - 3.5V Fuse - 3 x 30 Amp Dimensions - 12.42"(L) x 6.268"(W)x2.162"(H)