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Rockford Fosgate M750-1D

750W RMS Monoblock Class D Marine Amplifier

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    Rockford Fosgate M750-1D

    750W RMS Monoblock Class D Marine Amplifier

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    General Features:

    • Monoblock Class D Marine Amplifier
    • RMS Power Rating:
      • 4 ohms: 250 watts x 1 chan.
      • 2 ohms: 500 watts x 1 chan.
      • 1 ohms: 750 watts x 1 chan.
    • UV resistant and Salt-fog marine protection
    • Pulse Width Modulated MOSFET power supply
    • LED power (green) and protect (red) indicators
    • Punch EQ (0 to +18 dB bass boost at 45 Hz)
    • Soft start turn-on
    • Mono channel operation
    • Preamp RCA output to daisy chain multiple amps
    • 3-way protection circuitry (thermal, overload, and speaker short protection)
    • High-density split-dome convection heat-sink for extreme heat dissipation
    • Nickel-plated RCA level inputs
    • Nickel-plated screw terminals
    • Variable low-pass filter (50-250 Hz, 24 dB/octave Butterworth)
    • Variable 15-40Hz 12dB/octave infrasonic filter
    • CEA-2006 compliant amplifier
    • Frequency response: 20-250 Hz
    • 4 gauge power and ground wiring is required for installation. Contact us for information regarding a discount on select amplifier kits from our website when purchased together with this amplifier.
    • Dimensions: 6-7/10"W x 9-1/16"L x 2"H
    • 1-year SonicElectronix.com Warranty

    Power Specifications - Subwoofer Channel

    RMS Power @ 4 ohms
    The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far. If the final impedance of your speaker(s) or subwoofer(s) equals 4 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound. The 5th channel on these particular amplifiers are usually dedicated for driving subwoofers.
    250 watts x 1 channels
    RMS Power @ 2 ohms
    The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far. If the final impedance of your speaker(s) or subwoofer(s) equals 2 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound. The 5th channel on these particular amplifiers are usually dedicated for driving subwoofers.
    500 watts x 1 channels
    RMS Power @ 1 ohm
    The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far. If the final impedance of your speaker(s) or subwoofer(s) equals 1 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound. The 5th channel on these particular amplifiers are usually dedicated for driving subwoofers.
    750 watts x 1 channels

    Amplifier Specifications

    Marine Certified
    Marine certified means that the unit has been designed and manufactured with a marine use in mind. It will withstand the harsh conditions that come from marine use. Generally, they are treated against UV rays and treated with special protective coatings.
    Yes
    Amplifier Class

    An amplifier increases the power of the signal being fed to it by taking energy from its power supply and matching the signal but increasing its amplitude. Amplifiers use many different methods for converting these electrical signals and have been categorized into classes.

    Class A/B: Greater than 50% of the input signal is amplified while the other percentage is “off”. These amplifiers have a small amount of current flowing through the output transistors all the time which almost eliminates crossover distortion. Class A/B has great sound quality but is not as efficient as class D. These amps are most commonly used to drive speakers.

    Class D: Also known as switching amplifiers, class D amps have output transistors that are completely turned “on” or “off”. This means that when the transistors are on, there is almost no voltage across them but when they are off there is significant voltage but no current flowing through it which makes these amplifiers very efficient at the cost of sound quality. These amps are most commonly used to drive subwoofers.

    Other Classes: You may see classes such as GH, bD, X, FD, etc. by some manufactures. These amplifiers tend to be either class A/B, D or a hybrid of the two but with improvements to their designs that can make them more efficient or offer better sound quality.

    D
    Number of Channels
    Each channel on an amplifier will power one speaker using a positive and negative cable. There are various types of amplifiers, each designed to power a certain number of speakers. Monoblock amplifiers, also known as single channel, are designed to power one or more subwoofers. These amplifiers often have very high power ratings. On the other hand, multi-channel amplifiers power multiple speakers, usually at lower power ratings. 2-Channel and 4-Channel amplifiers can power car speakers or low powered subwoofers. Occasionally you might see a 5 or 6-channel amplifier that can power speakers and subwoofers at the same time. The most common setup is a monoblock amp to run subwoofers and a 4-channel amp to run door speakers. Check out our Knowledge Base for more information.
    1 - Mono
    Total RMS Power Output
    Total RMS power is measured by multiplying RMS power per channel by the number of channels, and is calculated at the lowest level of operating impedance.

    RMS power is the amount of continuous power, measured in watts, that an amplifier produces is called RMS power. The higher the RMS figure, the louder and cleaner your music sounds.

    The RMS output figure is much more accurate than the peak rating when comparing products.

    750 watts
    Maximum Input Gauge Size
    This is the largest gauge wire that will fit into the power and ground terminals of this device. The lower the gauge number, the thicker the wire is. For example, a 4 gauge wire is thicker than an 8 gauge wire and thus has higher current carrying capacity. Always do your best to get this size wire to reduce the risk of damage to your components.
    4 AWG
    Minimum Impedance Unbridged
    The lowest impedance the amplifier will handle when it is not bridged.
    1 ohms
    Minimum Impedance Bridged
    The lowest impedance the amplifier will handle when it is bridged.
    THD at Rated RMS Power
    The amount of change in harmonic content of the signal as it is amplified. A lower figure indicates less change and a more accurate amp. THD below 0.10% is inaudible.
    <1.0%
    Speaker Level Inputs
    Speaker level inputs are commonly referred to as high-level inputs and vice versa. This input type allows you to get your audio signal directly from the speaker wire in your vehicle, instead of using RCA cables. The advantage of this is factory integration, as most stock radios do not have RCA outputs to run amplifiers.
    No
    Preamp Outputs
    Many amplifiers are equipped with RCA preamp outputs which pass the original music signal from the source to additional amplifiers. This is known as daisy chaining because the source connects to the first amp, and the first amp connects to the second amp, etc. The advantage to daisy chaining is you only need one 2-channel RCA cable to transfer the signal from the head-unit to the amplifier, and then one additional cable for each amp being daisy chained.
    1 pair
    Built-in Crossover

    A crossover is a type of filtering system that permits only certain frequencies to play. A Low-Pass (LP) crossover allows only frequencies below its setting to get through which is good in the case of some subwoofers. A High-Pass(HP) filter allows frequencies above its setting to pass through, this is normally used on speakers.

    When a crossover is set to FULL it means no filtering is added and the full frequency spectrum is allowed through the amplifier. Filtering is important because feeding a speaker frequencies it cannot reproduce effectively creates distortion.

    Low-pass (LP)
    Low-Pass Crossover Frequency
    The low-pass crossover frequency is typically used for subwoofers. It can be a fixed crossover point or a variable crossover range. A variable low-pass crossover allows you to select a specific crossover point which allows frequencies below the set crossover point to pass, while making frequencies above the set point gently or harshly roll-off, depending on the steepness of the slope.

    The steepness of the roll-off slope is measured in dB/octave and refers to the rate of attenuation (lowering of volume) outside their pass bands.

    50 - 200 Hz
    Subsonic Filter
    Allows you to block (filter) ultra-low frequencies that your subs cannot reproduce.
    15 - 40 Hz
    Signal-to-Noise Ratio
    This spec compares the strength of the signal to the level of background noise. A higher value indicates less background noise.
    100 dB
    Bass Boost
    The objective of the bass boost is to get more kick out of your subwoofer. It is a circuit that emphasizes the lower frequencies at a given point. The bass boost should always be set first before setting the gain. This feature is known for destroying subwoofers and is commonly used incorrectly, so be cautious.
    0 - 18 dB
    Bass/Gain Remote
    If the amp comes with a bass/gain remote you will be able to control the level of your bass from your dashboard. Typically bass remotes also include a 16-20 ft. wire for installation.
    Yes
    Fan Cooled
    A great feature to have if an amp generates a large amount of heat. Cooling fans can help regulate the temperature to prevent the amp from overheating (burning).
    No
    Fuse Rating
    The amperage and the number of fuse(s) an amp requires.
    60A x 1 
    CEA-2006 Compliant
    Amplifiers that have been tested to meet specific standards. When a car amplifier meets these standards, you can be sure that it will be able to produce the amount of power specified by the official CEA-2006 rating. Usually, these rating consist of the following items:
    • RMS Power
    • Signal-to-Noise Ratio

    This rating applies to both external car amplifiers, as well as the amplifiers inside of in-dash stereos.

    Yes

    Specials with this Item

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    Warranty and Return Policy

    Parts Warranty Duration
    1 year
    Labor Warranty Duration
    1 year
    Warranty Provider
    Manufacturer

    Summary of Customer Ratings & Reviews

    Rating Distribution

    5 Star
    100%
    4 Star
    0%
    3 Star
    0%
    2 Star
    0%
    1 Star
    0%

    Average Attribution Rating

    Durability
    5.0
    Value
    5.0
    Features
    5.0
    Design
    5.0
    Usability
    5.0
    Carlos

    Miami ,florida

    Overall
    Durability
    Value
    Features
    Design
    Usability
    Good Product

    March 5, 2013

    Thank you for this product it is awesome, good design, responded well.

    20 of 25 found this helpful

    Was this review helpful to you?

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    Browse 1 question and 1 answer
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    Why did you choose this?
    Sonic Electronix Store
    Awesome amp - powering 4 10" subs in my boat. I get a solid 3 plus years before it needs to be replaced. In a salt water environment - I can't complain with that performance. Great bang for the buck.
    John M on Feb 29, 2016

    Product Summary

    Manufacturer

    Model Number

    M750-1D

    UPC

    780687340827

    Weight

    5.50lbs

    Internal SKU

    m7501d

    Internal Product ID

    43380

    Sonic Electronix Wiring Guide

    Wiring Diagram Legend

    Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

    Product Name: Rockford Fosgate M750-1D