This amplifier is previously a demo board unit and has some blemishes. They have been tested and confirmed to be working. Units come with bass knob.

New and improved for 2018 the X2 1100.1 is better than ever. Already a current or past owner of an XDi 1100.1? The new ARC Audio X2 Amplifier Series has been refined to offer users the highest level of clean and effortless power production possible. Just what you have grown to expect from all ARC Audio products. With improved regulation and filtering, updated elegant silver hairline cosmetics and improved efficiency, the X2 1100.1 is the perfect match for most any subwoofer application you could consider.

• Bridged mode auto detect turn-on works with most chip based OEM Headunits.
• Fully balanced input stage significantly increases flexibility.
• RCA inputs are compatible with speaker level inputs.
• Micro-processor controlled protection includein short circuit, thermal, DC Offset, overvoltage and undervoltage.
• Fault code storage of the last protection code detected.
• Quick disconnect speaker terminal plugs.
• Audiophile Class D output filter networks.
• Remote bass level control capability for quick tweaking of the low frequency level.
• Selectable Impedance optimization allows full power output at either 2 or 4 ohm stereo operation. (On selected Models)
• Flexible mounting orientation for vertical or horizontal installations.
• High frequency switching power supply delivers greater separation from audible listening frequencies increasing sound quality and signal-to-noise ratio.
• Input inductor isolated power supply storage bank compensates for potential fluctuations in power demand improving dynamic responses during demanding musical passages.
• High speed Class D technology powers all XDi amplifiers. Producing very little heat.
• 1 Channels at 4 ohms: 350 Watts
• 1 Channels at 2 ohms: 600 Watts
• 1 Channel at 1 ohms: 1100 Watts
• Frequency Response: 20Hz - 230Hz
• Bass Boost: 12dB at 30-125Hz
• Remote Included: Yes
• XDi Trim Kit: Included
• Dimensions: 13.0“ (L) x 6.268” (W)
• Weight: 9LB