Rockford Fosgate M600-4D

4-channel marine amplifier — 100 watts x 4 channels

Item #: 575M6004D

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3 Reviews | 1 question - 1 answer

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Big power, small chassis

Rockford Fosgate's compact marine amplifiers provide high-efficiency Class-D power for your marine audio system. They meet tough UV and Salt-Fog protection standards, so you can install them with confidence in your pleasure craft, whether you're blasting across inland waterways, or cruising out to your favorite salt-water fishing grounds.

Rockford Fosgate M600-4D marine amplifier

100 watts RMS by 4 channels

The M600-D4 4-channel amp delivers the power you need to drive two pairs of full-range speakers in your boat, sending 100 watts continuous power to each speaker. If you want to power a pair of subs, you can bridge the amp to 2-channel mode, sending 300 watts to each subwoofer — plenty of kick if you want some bass on board.

The amp features variable frequency filters to adjust the amp's output to your system, whether you're running full-range speakers or subs. And the compact footprint makes it easy to mount the amp in a small storage locker or other tight spot.

Product Highlights:

  • 4-channel marine amplifier
  • 100 watts RMS x 4 at 4 ohms (150 watts RMS x 4 at 2 ohms)
  • 300 watts RMS x 2 in bridged mode (4-ohm stable in bridged mode)
  • efficient Class-D design
  • conformal-coated circuit board and UV-resistant finish
  • variable high- and low-pass filters (50-500 Hz, 12 dB per octave)
  • variable bass boost (0-12 dB at 45 Hz)
  • CEA-2006 compliant
  • preamp-level inputs
  • preamp outputs
  • 4-gauge marine-rated power and ground leads recommended — wiring and hardware not included with amplifier
  • 11-1/8"W x 2"H x 6-7/8"D
  • warranty: 1 year
  • Our 60-day money-back guarantee

Hands-on research

What's in the box?

Download owner's manual

  • 4-Channel marine amplifier
  • 3mm Hex key
  • 4 Self-tapping screws (length=1-5/8")
  • Installation & Operation Manual
  • Amplifier Verification Certificate

Scratch & Dent items may be missing non-essential accessories. In some cases the manufacturer's accessories have been replaced with generic equivalents.

Product Research

Features
Controls
Connections

Features

Overview: The Rockford Fosgate Prime Marine M600-4D is a 4-channel full-range Class D marine amplifier. It is optimized to power a full-range front/rear speaker system. You can also bridge the front and/or rear channels to run a subwoofer or two. The Class D design is very efficient with a cast aluminum heatsink to keep it in a small footprint.

Marine Amplifier: The M600-4D is designed for the harsh marine environment. The amplifier features a conformal-coated PCB and UV-resistant finish, and conforms to UV and Salt-Fog protection standards.

CEA-2006 Compliant: CEA-2006 is a system of testing and measurement methods for mobile audio amplifiers. This voluntary standard advocates a uniform method for determining an amplifier's RMS power output and signal-to-noise ratio. The criteria for measuring power uses a DC input voltage of 14.4 volts and the RMS power output is measured into a 4-ohm load with 1% or less Total Harmonic Distortion plus noise (THD+N). Signal-to-Noise ratio is measured in weighted absolute decibels (dBA) at a reference of 1 watt into 4 ohms. CEA-2006 allows consumers to compare amplifiers and receivers on an equal basis. The CEA-2006-rated RMS power output is as follows (measured with a 14.4 volt input, <1% THD+N, 20 Hz-250 Hz):

  • 4-Ohm: 100 watts x 4
  • 2-Ohm: 150 watts x 4
  • Bridged (4-Ohm): 300 watts x 2

LED Indicator: The amplifier is equipped with a top-mounted LED indicator which illuminates blue when the unit is turned on. The LED illuminates red when a protection circuit engages (short circuit or too low an impedance is detected at the speaker connections). The amplifier automatically turns off if this occurs.

Mounting: The amplifier can be mounted vertically, horizontally, or inverted using the supplied mounting screws; horizontal mounting (right side up) will provide the best cooling.

Controls

Independent Controls: The M600-4D has independent, top-mounted controls for the front and rear channels. The controls include:

  • Gain Control: The amplifier has rotary gain controls (0 to 11) for front and rear channels.
  • Crossovers: The amplifier features independent Butterworth crossovers for the front and rear channels. Each crossover can be set for low-pass, high pass, or all-pass (full range). The crossover frequency is continuously variable from 50-250 Hz with a slope of 12 dB per octave.

Punch EQ: The rear channel has an independent Punch EQ (bass boost) control that works with the crossover switch. When the rear channel crossover is set to low-pass, the Punch EQ can add a bass boost, centered at 45 Hz, from 0 dB to +18 dB.

2/4 CH Switch: When the 2/4 CH switch is set to the 2 CH position, the inputs are switched to a 2-channel mode. The signal on the front input feeds all four output channels, however, you lose front to rear fading capability. In the 4 CH position, the amp uses both front and rear inputs and fading capability is restored.

Connections

Power Terminals: The power and ground terminals are nickel-plated set-screw terminals, and will accommodate up to 4-gauge wire. The set screws can be tightened/loosened with the supplied 3mm hex key.

Fuses: The amplifier does not have on-board fuses. A 60A fuse should be placed on the power wire within 18" of the battery.

Remote Turn-On Terminal: The remote turn-on terminal is a nickel-plated set-screw terminal that will accommodate up to 8-gauge wire. The set screws can be tightened/loosened with the supplied 3mm hex key.

Speaker Terminals: The speaker terminals are nickel-plated set-screw terminals that will accommodate up to 8-gauge wire. The set screws can be tightened/loosened with the supplied 3mm hex key.

RCA Input Jacks: There are two pairs of RCA input jacks for the front and rear channels. They are nickel-plated to resist signal degradation caused by corrosion.

RCA Pass-Thru Jacks: The nickel-plated RCA pass-thru jack provides a convenient source for daisy-chaining an additional amplifier without running an extra set of RCA cables from the front of the vehicle to the amplifier location.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Rockford Fosgate M600-4D Reviews

Average Customer Review:

3 reviews
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Super great

Written By RayS., McClellandtown,Pennsylvania on Wednesday, November 05, 2014

Crutchfield Customer Review (What's this?)

A great Amp in my Kawasaki Teryx 750 Loud and clear sound. A great amp. Thank you Crutchfield.

Pros: Great, Loud, clear and weatherproof

Cons: None

Rockford Fosgate M600-4D

Written By Gtw7ww, Raleigh nc on Thursday, July 10, 2014

Amazing sound. Quality connections. Couldn't be happier.

Pros: Everything about it. Sleek, loud, this is perfect.

Cons: None

Great Amp!

Written By Dan, Newtown, CT on Saturday, July 28, 2012

Crutchfield Customer Review (What's this?)

Great amp! I've tried a lot of brands and I think Rockford Fosgate makes the best boat amp around. Plenty of clean power, no noise, and that base boost pumps. I paired with Polk ultra marine speaker 4 x 100w and they sound great together. Don't even need to add a sub.

Pros: Good clean power. No noise. Compact size for power rating.

Cons: None.

Get everything you’ll need to enjoy your new Rockford Fosgate M600-4D

Marine-grade wire is your best choice for use in a boat
Use marine-grade patch cables to keep the sound flowing cleanly from your stereo to your amplifier.
JL Audio XM-WHTSC16 Speaker Wire

JL Audio XM-WHTSC16 Speaker Wire

16-gauge marine speaker wire — priced per foot

Item #: 13691692

(14)

JL Audio Marine RCA Patch Cables

JL Audio Marine RCA Patch Cables

2-channel marine audio interconnect cables (3 feet)

Item #: 13690436

(7)

$13.99
Add to Cart
JL Audio Marine Y-adapter Cables

JL Audio Marine Y-adapter Cables

18" long (1 female RCA to 2 male RCA)

Item #: 13690472

JL Audio Marine Y-adapter Cable

JL Audio Marine Y-adapter Cable

18" long (1 male RCA to 2 female RCA)

Item #: 13690475

Questions & Answers Ask the community. Share your knowledge.

1 question already asked

Thanks for your question. For information on selecting the best amp I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They will be able to help determine the differences between the amp models and help you make the best choice for your system. [ Krissy  Apr 16, 2014 ]  Staff