The Kenwood eXcelon XR601-1 is a compact Class D mono amplifier built for buyers who want real subwoofer power without giving up installation flexibility. Its low-profile chassis makes it easier to fit in tighter vehicle spaces while still delivering serious bass output for aftermarket subwoofer systems. This amplifier is rated at 400 watts RMS x 1 at 4 ohms and 600 watts RMS x 1 at 2 ohms, with a variable low-pass filter, infrasonic filter, bass boost, speaker-level inputs, and signal-sensing turn-on. That makes it a strong fit for factory integration builds, clean stealth installs, and everyday systems that need dependable mono sub power from a compact chassis. Key Features Class D mono subwoofer amplifier 400 watts RMS x 1 at 4 ohms 600 watts RMS x 1 at 2 ohms Compact low-profile eXcelon Reference chassis Variable low-pass filter Variable infrasonic filter Variable bass boost Speaker-level inputs Signal-sensing turn-on Wired remote bass controller included 2-year warranty Connectivity & Integration Amplifier type: Mono Class D subwoofer amplifier Speaker-level input: Yes, for easier integration with compatible factory or aftermarket source units Signal-sensing turn-on: Yes Remote level control: Wired remote bass controller included Application: Designed for powering a subwoofer or mono bass channel in aftermarket car audio systems Power & System Control CTA-2006-D rated output of 400W x 1 at 4 ohms and 600W x 1 at 2 ohms Frequency response rated at 20Hz-200Hz (±1dB) Variable low-pass filter for dialing in subwoofer crossover settings Variable infrasonic filter helps control unusable ultra-low bass Variable bass boost adds low-frequency emphasis when desired Compact design works well in builds where space is limited but clean bass output still matters Installation & Fitment Notes Amplifier type: Mono subwoofer amplifier Chassis size: Compact footprint for easier mounting in tight spaces Dimensions: 8-11/16" W x 1-3/8" H x 6-5/8" D Operating voltage: 14.4V nominal, 11V-16V allowable Current consumption: 46A Proper power wire, ground, fuse protection, and speaker load configuration should be confirmed before installation This amplifier is intended for subwoofer duty and is not a full-range multi-channel amplifier Technical Specifications Model: XR601-1 Amplifier class: Class D Channels: Mono RMS power at 4 ohms: 400W x 1 RMS power at 2 ohms: 600W x 1 Maximum dynamic power: 500W at 4 ohms Frequency response: 20Hz-200Hz (±1dB) Input sensitivity: 0.2V-5.0V Input impedance: 10k ohms Signal-to-noise ratio: 100dB Dimensions: 220 x 35 x 169mm Weight: 1.6kg Identifiers & Packaging Manufacturer Part Number (MPN): XR601-1 UPC: 019048222428 Sold As: Each Included Components: XR601-1 amplifier, wired remote bass controller, and manufacturer-supplied accessories/documentation Why Buy From MCOR Automotive Authorized Kenwood retailer Experienced with amplifier matching, subwoofer power planning, and clean installation layouts Support for choosing the right wiring, subwoofer load, and integration parts for a reliable setup System Matching & Installation Help Use the MCOR Automotive Vehicle Fit Guide to start with your vehicle details, or contact MCOR Automotive through the chat button for help matching amplifier power, speaker load, wiring, and factory audio integration parts. Amplifier wiring kits, line output converters, DSP/interface modules, vehicle-specific integration parts, and installation hardware are sold separately unless specifically listed.