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Kicker's ZXM marine amplifiers provide a strong foundation for a true high-performance marine audio system, standing up to the demanding marine environment and meeting your demands for pure, clean power. They set the standard for reliable marine performance, with a conformal coating on the inner circuit board that rejects moisture, plus fuses and power connections that meet marine industry standards for protection from the elements.

The ZXM350.4 4-channel amp delivers the power you need to drive two pairs of full-range speakers in your boat's cockpit, cabin, wakeboard tower, or wherever suits you. Bridge the output of the amp to two channels and power a pair of subwoofers with a robust 175 watts to each. And you won't run aground on inflated "peak power" ratings here — you can trust that this amp's CEA-2006 compliant rating reflects a true measure of its capabilities. Efficient heat sinks and rugged internal components ensure reliable operation and clean power output when the volume is cranked.

The built-in variable frequency filters adjust the amp's output to get the most out of your speaker setup, whether you're running full-range speakers or subs. You can use the bass boost control to dial in the perfect amount of low-end bump. The amp accepts preamp- or speaker-level signals, and you can use the preamp outputs to get signal to another amplifier in your system.

Product Highlights:

  • 4-channel marine amplifier
  • 60 watts RMS x 4 at 4 ohms (90 watts RMS x 4 at 2 ohms)
  • 175 watts RMS x 2 in bridged mode (4-ohm stable in bridged mode)
  • conformal-coated circuit board and protected fuses and power connections
  • variable high- and low-pass filters (50-200 Hz, 12 dB per octave)
  • variable bass boost (0-18 dB at 40 Hz)
  • three auto-turn on modes
  • CEA-2006 compliant
  • preamp- and speaker-level input capability
  • 4-gauge power and ground leads recommended — wiring and hardware not included with amplifier
  • 13-1/2"W x 2-1/8"H x 9-5/8"D
  • warranty: 2 years
  • Our 60-day money-back guarantee

Kicker ZXM350.4 Reviews

Hands-on research

What's in the box?

Download owner's manual

  • 4-Channel marine amplifier with two 20A ATC blade fuses inserted
  • 2 Spare 20A ATC fuses
  • 4 Self-tapping screws (length=3/4")
  • 3mm Allen wrench
  • Owner's Manual
  • Kicker "Livin' Loud" Certified Power certificate

Product Research



Marine Amplifier: The Kicker ZXM350.4 Marine Amplifier's special weather-resistant features allow it to withstand the harsh marine environment to give you dependable performance. The inner circuit board has been sprayed with a moisture-deterring, protective conformal coating, and the fuses and power connections meet marine industry standards for protection against the elements.

CEA 2006 Compliant: The ZXM350.4's power ratings are measured according to the strict standards dictated by the Consumer Electronics Association (CEA). These standards allow you to accurately compare the rated power output of all CEA 2006-compliant amplifiers, even if they come from different brands. Manufacturers who adhere to the standards can display the CEA 2006 logo on their products and packaging.

Kicker "Livin' Loud" Certified Power Certificate: The amplifier comes with a certificate that indicates the total maximum wattage of the particular amplifier, along with the model number, serial number, tested date, and whether the amplifier passed the total harmonic distortion, signal-to-noise ratio, and protection circuit tests.

Protection Circuitry: The ZXM350.4's protection circuitry guards against accidents and undesired operation. The amp is protected by thermal protection, voltage protection, and short circuit protection. The red Protection LED on the end of the amp illuminates whenever the amp's protection circuit has been engaged. The amplifier stays in protect mode until the problem is resolved.

Automatic Turn-on Modes: For ultimate flexibility, the amp gives you a choice of three automatic turn-on modes, selectable on the end of the amp:

  • Remote Turn-on: The preferred automatic turn-on method is to connect an 18-gauge wire to your remote turn-on lead of the source unit and to the REM terminal of the amp. The amplifier turns on when the REM terminal receives a +12 volt signal.
  • DC Offset Turn-on: If remote turn-on isn't an option, the DC offset method is next preferred. The DC Offset mode detects a 6V DC offset from the Hi-level speaker outputs when the source unit is turned on.
  • Signal Sense Turn-on: The amplifier turns on automatically when an incoming audio signal is detected from the source unit. The input gain control must be set properly in order for this method to work.


Gain: You can set the input sensitivity for the front and rear channels of the amplifier independently. You can set the gain between 0 and 11.

Crossover Frequency: The internal crossover for the front and rear channels of the amplifier can be set independently for high-pass or low-pass, or turned off for full-range operation (using a switch on one end of the amp). When engaged, the crossover is continually variable from 50 to 200 Hz. The filter has a slope of 12dB per octave.

Bass Boost: The bass boost circuit provides a variable 0-18dB signal boost at 40Hz.

Fader Switch: The fader switch should be in the "On" position, to allow fading between the channels on the source unit. If the amp is connected using only one set of inputs, you can drive all four channels if the fader switch is in the "Off" position.


Power/Ground/Remote Turn-On:

  • +12V (power): gold-plated set screw terminal (accepts up to 4 gauge wire)
  • REM (remote turn-on): gold-plated set screw terminal (accepts up to 8 gauge wire)
  • GND (ground): gold-plated set screw terminal (accepts up to 4 gauge wire)

Audio Inputs: Two sets of gold-plated RCA input jacks. The amplifier's RCA inputs can accept a low-level or high-level audio signal.

Note: You will need a speaker wire to RCA adaptor (136CLR2SW, sold separately) to connect this amplifier to your headunit via speaker-level.

Speaker Outputs: 4 pairs of gold-plated screw terminals (accepts up to 8 gauge wire).

Fuses: Two 20-amp ATC fuses.

Our Product Research Team

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