Rockford Fosgate 1,500 Watt 5-Channel Element Ready™ Amplifier (M51500X5)

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Rockford FosgateSKU: M51500X5

Sale price $1,439.99 Regular price$1,799.99

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The M5-1500X5 amplifier features the next level of Element Ready™ design from Rockford Fosgate that’s built as rugged as the outdoor environment it’s used in. The IPX6 rating is provided by splash guards on both ends and heavy-duty molded harnesses with integral sealing gaskets. A new PRESET switch - for use with Rockford Fosgate UTV audio kits - eliminates the need to set-up and tune the amp for the best experience possible. Built on the popular TM series, M5 amplifiers feature the same great technologies like Constant Power, Class-AD/BD and C.L.E.A.N., all engineered, developed, and validated in Tempe, Arizona.

M5-1500X5 Overview

Rockford Fosgate amplifiers are known world-wide for producing more power than their ratings suggest. The M5 amplifiers are the first series based on new industry standard Dynamic Power ratings, bringing their conservative ratings to the forefront. Engineered from the ground up and purpose-built to deliver more output where you actually hear it, this is real dynamic power that performs not only on paper, but performance heard through the musical experience. You’ll see two amplifier power ratings, the traditional Continuous Power output, and the new Dynamic Power output, both tested in accordance with the CTA-2006 specification. Consider Continuous Power as wattage developed on the test bench for comparison against other amplifiers in the same class, and Dynamic Power as real-world wattage when connected to a speaker load, listening to music. Either way you look at it, Rockford Fosgate is proving – once again – these amplifiers are powerful enough to drive any speaker or subwoofer you throw at them.

  • Element Ready™ design with integrated harness & panel seals
  • PRESET removes the need to set-up and tune the amp when used with Rockford Fosgate UTV audio kits
  • Play all day, easy to integrate, and keep music playing for extended lengths of time
  • C.L.E.A.N. input/output clip detection and indicator LEDs
  • Constant Power provides instantaneous delivery of output over varying impedance loads
  • Focused mass heat sink allows critical aluminum material to be located around hottest internal devices
  • Top mounted control panel with Element Ready™ smoked lens cover
  • OEM and aftermarket radio integration inputs
  • Low Impedance Stability
  • Proprietary testing using RATS (Rockford Automated Testing System)
  • Proprietary Class-AD technology allows amplifier to produce more power with less current draw
  • Class-BD technology provides 75-80% efficiency over traditional class A/B designs
  • Discrete Surface Mount technology utilizes 1% tight-tolerances for high efficiency and reduced cross-talk
  • MESHA 4 reduces MOSFET temps, lowers distortion, increases durability and prolongs device life span
  • Chassis Isolation from mounting points greatly reduces possible introduction of vehicle noise
  • Balanced Differential Inputs eliminates noise picked up by signal cables
  • Remote-Out feature when using high level inputs
  • 2 Year Warranty


Element Ready™ - Amps

These amplifiers are protected against Dust, UV, Corrosion, and feature Stainless hardware.

IPX6 Water Intrusion Rated

Water projected in powerful jets from any direction shall have no harmful effects.

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.


This technology allows the amplifier to produce more power with less current draw from the vehicle's charging system.


Class-BD amplifiers have 75-80% efficiency ratings vs. 20-60% efficiency ratings of traditional Class-A/B amplifiers.


DSM utilize 1% tight-tolerances improving efficiency of the circuit, decreases cross-talk from other discrete components and lowers operating temperature.


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

MEHSA 4 (Maximum Efficiency Heat Sink Application)

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

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.

Balanced Differential Inputs

Differential inputs eliminate noise picked up by signal cables.

Constant Power

Constant Power is a patented circuit topology that provides instantaneous delivery of output power over varying impedance loads.

Punch EQ2

Onboard equalizer with up to +18dB @ 45Hz and/or up to +12dB boost at 12kHz.


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

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.


CEA-2006 Compliant Yes
CTA-2006 Compliant  
Number of Channels 5
Total Power (Sum of Rated Power) 1500 Watts
Rated Power (RMS Continous Power) CTA-2006 Continuous Power Rating
  • 100 Watts x 1 @ 4Ω
  • 100 Watts x 1 @ 2Ω
  • 200 Watts x 1 @ 1Ω Bridged/Mono ≤1.0% THD+N
Dymanic Power (PVC/PowerCube®) CTA-2006 Continuous Power Rating
  • 125W × 4 + 400W x 1 @ 4Ω
  • 200W × 4 + 700W × 1 @ 2Ω
  • N/A + 700W × 1 @ 1Ω
  • 400W × 2 + N/A @ 4Ω bridged
Bridgeable Yes
Frequency Response (Hz) 10 Hz - 50 kHz
Input Sensitivity 150mVrms - 12Vrms
Circuit Topology Class
  • Class-AD
  • Class-BD (sub channel)
  • Efficiency (average) <75%
    Total Harmonic Distortion (THD+Noise) >0.2% THD+N @ 1 Watt
    Signal Input
  • Low-Level: 2 RCA
  • High-Level: 4-Pin Molex
  • Signal Output N/A
    Tone Controls
  • Front/Rear: 0-14dB @ 12.5kHz
  • Front/Rear: 0-18dB @ 45kHz
  • Sub: 0-18dB @ 45 Hz
  • Crossover Controls
  • High-Pass: 50 Hz - 250 Hz @ 12dB/Octave Butterworth
  • Low-Pass: 50 Hz - 250 Hz @ 12dB/Octave Butterworth
  • Infrasonic: 30 Hz @ 12dB/Octave Butterworth
  • Remote Controls No
    Visual Indicator
  • Power: Blue
  • Protect: Red
  • Input Clip: Red
  • Output Clip: Blue/Red
  • Power Wire Gauge 4 AWG
    Power Input Connector Compression Terminal Block
    Speaker Wire Gauge 16 AWG
    Speaker Output Connector 4 - Pin Molex
    Cooling Convection
    Heatsink Extruded Aluminum
    Operating Voltage 9 - 16 VDC
    Recommended Fuse (Not Included) N/A
    Average Current Draw (13.8 V Music) N/A
    Max. Current Draw (13.8V Sinewave)
  • 90 A @ 4Ω
  • 140 A @ 2Ω
  • 170 A @ 4Ω
  • 150 A @ 4Ω Bridged
  • Suggested Alternator  
    Dimensional Diagram  
    Dimensions (H x W x D)
  • H: 1.7" (43.2 mm)
  • W: 4.25" (108 mm)
  • D: 12.3" (311.4 mm)
  • * Does not include Harnesses

    Shipping Weight TBA

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