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Compact mono subwoofer amplifier with weatherproof coating

KENWOOD

Kenwood eXcelon XM502-1 Mono Subwoofer Amplifier 500W RMS

SKU CH-MRKY-BP7R7

Compact mono subwoofer amplifier delivers 500 watts RMS at 2 ohms with Class-D efficiency, variable low-pass filter, bass boost and subsonic filter for powersports and marine use

  • Typeamplifier
  • Delivers 500 watts RMS at 2 ohms for powerful bass
  • Class-D design runs cool and reliable in tight spaces
  • Conformal coating shields circuits from water and dirt
  • Variable low-pass filter 50-200 Hz at 24 dB/octave tunes sub output
  • Subsonic filter at 25 Hz removes ultra-low frequencies efficiently

Compact mono amplifier for powersports

The Kenwood eXcelon XM502-1 is a mono subwoofer amplifier built for boats and off-road vehicles where space is tight. It delivers 500 watts RMS at 2 ohms and 300 watts RMS at 4 ohms from a Class-D design that stays small enough to mount almost anywhere. Conformal coating shields the internal circuitry from water and dirt so the amp survives rough conditions on road, trail or waterway. It accepts RCA or speaker-level signals for broad system compatibility.

Class-D efficiency with weather-proof construction

Class-D topology keeps heat low and current draw modest during normal operation, allowing reliable performance in enclosed mounting locations. The conformal coating adds a barrier against moisture and debris without relying on bulky seals. No fan noise is produced, so the amp runs silently while powering a subwoofer. Power consumption scales with output, drawing only what the load demands at any moment.

Flexible integration for space-constrained builds

Speaker-level inputs with automatic signal sensing remove the need for a separate remote turn-on lead, simplifying wiring in vehicles without dedicated RCA outputs. A variable low-pass filter adjustable from 50 to 200 Hz at 24 dB per octave tailors the bandwidth to the subwoofer. Bass boost adds up to 18 dB at 40 Hz for extra impact, while a 25 Hz subsonic filter at 24 dB per octave protects the driver and improves efficiency. An optional wired remote enables level control from the driver seat.

Highlights

  • Delivers 500 watts RMS at 2 ohms for powerful bass
  • Class-D design runs cool and reliable in tight spaces
  • Conformal coating shields circuits from water and dirt
  • Variable low-pass filter 50-200 Hz at 24 dB/octave tunes sub output
  • Subsonic filter at 25 Hz removes ultra-low frequencies efficiently

Specifications

Typeamplifier

Questions about this item

How do I wire the Kenwood eXcelon XM502-1 using speaker-level inputs without a remote turn-on lead?

Connect the speaker wiring to the amplifier's high-level inputs; the unit will automatically sense the signal and power on without a separate remote turn-on wire.

Which filters on the XM502-1 need adjustment if the subwoofer starts sounding muddy during long play sessions?

Raise the subsonic filter at 25 Hz and narrow the variable low-pass filter between 50-200 Hz at 24 dB per octave to clean up low-frequency buildup.

At what impedance does the amplifier deliver its full 500 watts RMS, and what happens if I run it at 4 ohms instead?

The XM502-1 produces 500 watts RMS at 2 ohms; at 4 ohms the output drops to 300 watts RMS, so match your subwoofer wiring to the 2-ohm load for maximum power.

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