48KMA6004

Marine Amplifier: The Kicker KMA600.4 (48KMA6004) 4-channel amplifier is effectively two full range 2-channel amps built into one chassis, labeled Amp 1 and Amp 2. Each section of the amp is bridgeable, so it can be wired as 4-channel, 3-channel, or 2-channel. Designed for the marine environment, the KMA600.4 features marine-grade speaker terminals, stainless-steel screws, conformal-coated circuit boards, and ABYC/NMMA-compliant power and ground connections.

Note: The Kicker KMA600.4 marine amplifier is not waterproof and should not be mounted where it will get wet.

Class D Amplification: The KMA600.4 features state-of-the-art Class D amplification which provides ample power in a compact chassis. The 4-channel amp can provide the following power output:

• 75 watts RMS x 4 @ 4 Ohms (@14.4V, ≤ 1% THD+N)
• 150 watts RMS x 4 @ 2 Ohms (@14.4V, ≤ 1% THD+N)
• 300 watts RMS x 2 @ 4 Ohms bridged (@14.4V, ≤ 1% THD+N)

 Controls:

• Input Level: 2-position switch; select high (speaker-level) or low (line-level)
• Input Gain Control: independent rotary gain controls for Amp 1 and Amp 2; continuously variable from 250mV to 10V with the input level switch set to low; 1V to 40V with the input level switch set to high
• Crossover: independent 3-position switches for Amp 1 and Amp 2; select Off, High Pass, or Low Pass; the slope is 12dB/octave for both
• Frequency: separate rotary controls for Amp 1 and Amp 2; continuously variable from 50Hz-200Hz
• Fader: 2-position switch; turn on when using two pair of dedicated inputs; leave off when only using one pair of inputs
• KickEQ Bass Boost: separate rotary controls for Amp 1 and Amp 2; increase the bass level between 0dB and +6dB; centered at 40Hz

Auto Turn-on: The amplifier has two methods of turning on: +12V and DC Offset. The preferred method is to run an 18-gauge wire from the remote turn-on lead of the source unit to the Remote (REM) terminal on the amp. When a +12V signal is detected on the wire, the amplifier will turn on. If your source unit lacks a remote turn-on lead (a factory head unit, for example), you can choose to turn on the amplifier via the DC Offset method. When a DC offset is detected (>2.5 volts) on the speaker-level inputs, the amplifier automatically turns on.

Wire Connections: The KMA600.4 has set-screw terminals for the power, ground, turn-on (REM) connections, and a terminal strip for the speaker outputs. The power and ground terminals can accommodate 4 AWG wire (recommended) and the turn-on input can accommodate up to 10 AWG wire. The speaker output terminal strip can accommodate up to 14 AWG wire, either bare-ended or with spade terminals.

External Fuse: The amplifier does not include a built-in fuse, therefore an external fuse should be placed on the power wire, within 18" of the battery. It is recommended that a 4-gauge amplifier wiring kit and an 80-amp external fuse be used when installing the amplifier.

Note: Currently Kicker will extend the standard warranty by an additional year (for a total of three years) when a qualifying Kicker Installation Kit is purchased with the amplifier.

Input Signal: The KMA600.4 accepts either high (speaker-level) or low (line-level) input signals on the two pair of RCA inputs (Amp 1, Amp 2), selectable using the input level switch on the end of the amp. When using a speaker-level input signal, add the optional Kicker KiSL speaker-level to RCA adapter. The input sensitivity is 250mV-10V (low) or 1V-40V (high).

Dimensions: When mounted horizontally, the KMA600.4 dimensions are:

• Width: 12.438" (not including wire)
• Height: 2.250"
• Depth: 6.625"

• 4-channel marine amplifier
• 75 watts RMS x 4 at 4 ohms (150 watts RMS x 4 at 2 ohms)
• 300 watts RMS x 2 bridged at 4 ohms (4-ohm stable when bridged)
• Class D amp technology
• variable high- and low-pass filters (50-200 Hz, 12 dB/octave)
• variable bass boost (0-6 dB at 40 Hz) on all channels
• conformal-coated circuit board helps prevent corrosion
• marine-grade speaker terminals and ABYC/NMMA-compliant power connections
• fader switch eliminates need for Y-cords for input signals
• stainless-steel hardware
• preamp and speaker-level inputs (speaker wire to RCA adapters required for speaker-level input)
• wiring, fuse, and hardware not included with amplifier
  • 4-gauge power and ground leads and a 80-amp fuse recommended
• dimensions: 12-7/16"W x 2-1/4"H x 6-5/8"D

Support

Manuals

KMA Amplifiers Owner's Manual Download

Info Card Download

Support Links

Amplifier Power Testing
Subwoofer / Speaker FAQ
Box Building Help
Wiring Diagrams