Rockford Fosgate
300W 4-Channel Marine Amplifier

Rockford Fosgate M2-300X4
Rockford Fosgate M2-300X4 Rockford Fosgate M2-300X4 Rockford Fosgate M2-300X4 Rockford Fosgate M2-300X4 Rockford Fosgate M2-300X4 Rockford Fosgate M2-300X4


Designed to withstand the elements, the M2-300X4 Element Ready™ amplifier is a 300 watt, full-range class-D model, capable of operating at 4Ω or 2Ω stereo, and 4Ω bridged/mono. This amplifier is extremely efficient because of its class D technology which reduces demand on the electrical system. The amp also features C.L.E.A.N. circuitry to help you adjust your gain settings, a P.O.W.E.R. Supply that generates more power as voltage increases.

The M2 Series were developed for marine audio environments that feature UV resistant protection and special internal conformal coating that protect the electronics from water. It’s designed for those who want a reliable amplifier – with all the power and performance you’ve come to expect from Rockford Fosgate – at an economical price. Rockford Fosgate amplifiers are renowned world-wide for being “under rated,” easily surpassing all specifications, and most importantly, generating more power than their ratings. The latest generation of M2 Series amplifiers are also designed to be easy to setup and configure, making them perfect for use in any application.

  • UV Stable Powder Coated Cast Aluminum Heatsink
  • Zinc Nickel-Plated Marine Grade Brass Connection Terminals
  • Element Ready™ Design Protects against Outdoor Exposure
  • Optimized using AudioGraph PowerCube Measurement Tool
  • C.L.E.A.N. Input/Output Clip Detection and Indicator LEDs
  • Conformal Coated Circuit Board Protects against Dust and Water
  • 2/4 Channel Input Switch
  • RCA Pass-thru Outputs
  • Focused Mass Heat Sink allows Critical Aluminum Material to be Located around Hottest Internal Devices
  • Fully Adjustable 12 dB/octave High and Low pass Butterworth Crossovers
  • Short Circuit & Over Current Protection
  • Top Mounted Control Panel
  • Integration with OEM and Aftermarket Radios
  • Integrated Power and Speaker Terminals
  • Balanced Differential Inputs Eliminates Noise Picked up by Signal Cables
  • Quality and Performance tested using Proprietary RATS (Rockford Automated Testing System)
  • Low Impedance Stability
  • Auto-Sense Bypass Switch for Vehicles with RAP (Retained Accessory Power)
  • CEA-2006 Compliant & CE Compliant
  • "Auto-Sense" Turn-on with Remote Out (High Level In)
  • 2-Year Warranty

CTA-2006 Compliant

Power ratings on Rockford Fosgate amplifiers conform to CTA-2006 industry standards. These guidelines mean your amplifier's output power ratings are REAL POWER numbers, not inflated marketing ratings.

CE Compliant

This product fulfills all essential safety and environmental requirements as defined in the European Directives (768/2008 EC).

Full Range Class-D

A full-range version of the Class-D topology which is a high efficiency amplifier design that reduces current consumption from the charging system.

Balanced Differential Inputs

Differential inputs eliminate noise picked up by signal cables.

Element Ready™

All components are protected against harsh outdoor elements like Dust, UV, Temperature, Water, Corrosion and Vibration.


Power supply circuit design that allows the amplifier to increase output power as voltage increases.


MEHSA4 reduces MOSFET temperatures, lowers distortion, increases durability and prolongs the output device life span.


NOMAD is a "real time" analog computer that protects your amplifier from shorting speaker wires and dangerously low speaker impedances.

C.L.E.A.N. Set-Up

C.L.E.A.N. (Calibrated Level Eliminates Audible Noise) is a patented circuit with in/out clip LEDs to help match a source to amp and optimize output.

Engineered in the USA

These Avatars are a personal signature from the Rockford Fosgate team member(s) who designed and engineered this fanatic product. This statement illustrates our commitment to being Designed and Engineered in the U.S.A.


300W RMS
50W x 4 @ 4Ω
75W x 4 @ 2Ω
150W x 2 @ 4Ω Bridged/Mono
Dynamic Power
70W x 4 @ 4Ω
115W x 4 @ 2Ω
230W x 2 @ 4Ω Bridged/Mono
Frequency Response
20Hz - 20kHz +/- 1dB
Input Sensitivity
Low-Level: 150 mV - 4 V
High-Level: 450 mV - 12 V
Total Harmonic Distortion
4Ω: <1.0%
2Ω: <1.0%
Signal Input
Front Low-Level: 2 RCA
Front High-Level: 4-Pin Molex
Rear Low-Level: 2 RCA
Rear High-Level: 4-Pin Molex
Input Switch: 2/4 Input (for RCA/High-Level Inputs)
Signal Output
Low Level: 2 RCA
Pass-Thru active with RCA or Hi-Level input
Tone Controls
Crossover Controls
Front High-Pass: 50 Hz - 250 Hz @ 12dB/Octave Butterworth
Front Low-Pass: 50 Hz - 250 Hz @ 12dB/Octave Butterworth
Rear High-Pass: 50 Hz - 250 Hz @ 12dB/Octave Butterworth
Rear Low-Pass: 50 Hz - 250 Hz @ 12dB/Octave Butterworth
All-Pass: Yes
Remote Control
Power Wire Gauge
Power Input Connector
Compression Terminal Block
Speaker Wire Gauge
Speaker Output Connector
Compression Terminal Block
Operating Voltage
9 - 16 VDC
Recommended Fuse
60 A
Average Current Draw
Max. Current Draw
39 A
Suggested Alternator
1.9" x 6.8" x 10.1"
4.9 x 17.3 x 25.5 cm
4.75 lbs (2.15 kg)
More Information
Brand Rockford Fosgate
Amplifier Class Class D
RMS Power 300W RMS