Powerful, dependable, and good-looking

Kicker's KXMA500.4 marine 4-channel amplifier will bring brilliance and clarity to your sound, powering four speakers with 75 watts RMS each. This reliable and compact KXM Series rocker will run cool even when pushed hard, thanks to its high-mass heatsink, high-tech internal components, and efficient full-range Class-D amp technology. Building a big system piece-by-piece? You could start by using this amp in 2-channel mode to drive a couple subs with 250 watts each, and then later switch the amp back to 4-channel mode to power your speakers when you get a bigger amp for the subs.

Made for marine use

The KXMA500.4 features a conformal coated circuit board for improved water and dust resistance, plus corrosion-resistant power connections, a gasket-sealed front cover, and stainless steel mounting hardware that won't rust all over your boat's gel coat or carpeting.

Connection perfection

Kicker employs their Fail-Safe Integration Technology (FIT2™) to reject noise and stop any interference generated by your boat's electronics, so you'll enjoy your music clean and pure. Speaker-level inputs make it possible to hook this amp up to almost any stereo receiver or radio. Kicker also helps you set this amp's gain properly, by offering free test tones for downloading. You play a tone and turn the gain up until the gain knob glows red. Then, you turn it down until it just goes out, and the amp's gain is set perfectly.

Versatile controls behind the folding door

A gasket-sealed front door gives you quick and easy access to your amp's controls. You can tune for almost any kind of speaker, as the steeply-sloped high- and low-pass filters offer a wide range of adjustment. The filter section for the Amp 2 channels can be set up for bandpass operation — where both the high- and low-pass filters are engaged to allow only the frequencies between them to play — for optimizing the signal for midrange speakers in a 3-way system.

Product highlights:

• 4-channel marine amplifier
• 75 watts RMS x 4 at 4 ohms (125 watts RMS x 4 at 2 ohms)
• 250 watts RMS x 2 bridged at 4 ohms (4-ohm stable in bridged mode)
• CEA-2006 compliant
• Class D amp technology
• gain knobs also function as clip lights
• Amp1:
  • variable high- or low-pass filter (10-500 Hz, 24 dB/octave) with 10x switch
• Amp 2:
  • variable high-pass filter (10-500 Hz, 24 dB/octave)
  • variable low-pass filter (40-500 Hz, 24 dB/octave) with 10x switch
  • bandpass engages both high- and low-pass filters
• variable bass boost (0-6 dB at 40 Hz) on all channels

More Features:

• weather-resistant conformal-coated circuit boards
• front-mounted controls protected behind gasket-sealed fold-down door
• Fail-Safe Integration Technology eliminates noise from your vehicle's electrical system
• preamp and speaker-level inputs (speaker wire to RCA adapter required for speaker-level input)
• preamp outputs
• wiring, hardware, and fuse not included with amplifier
  • 4-gauge power and ground wiress and a 100-amp fuse recommended
• dimensions: 11-3/16"W x 2-3/16"H x 8-5/16"D
• warranty: 3 years

What's in the box:

• 4-Channel marine amplifier
• Four 2" screws
• 4 Flat-washers
• 3mm Allen key
• Amplifier information sheet (Eng/Span/Fren/Ger)
• Power chart
• Kicker power certification