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Rockford Fosgate  R2-750X1 On Sale

Prime Series 750W RMS x 1 at 1-Ohms, Class D Mono Subwoofer Car Amplifier with Remote Level Control included

Item #90911

Condition:   Brand New

Product Highlights

  • Prime Series
  • 750W RMS
  • Mono Amplifier
  • Class D
  • Remote Level

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Rockford Fosgate R2-750X1 Prime Series 750W RMS x 1 at 1-Ohms, Class D Mono Subwoofer Car Amplifier with Remote Level Control included


We are a Rockford Fosgate authorized dealer so you get up-to-date, fully warrantied products. Shipping is free to the lower 48 states on everything you order!

What's Inside?
  • • Prime Series Class-D Mono Subwoofer Car Amplifier
  • • 7" Speaker input harnesses
  • • (4) 3/4" Screws
  • • (2) 1/2" Screws
  • • (5) Flat washers
  • • Nut
  • • 3mm Allen Hex key
  • • 16' Remote cable (RJ-25 connector on both ends)
  • • Wired Remote Level Control module
  • • Certificate of Performance
  • • Rockford Fosgate contact information
  • Owner's Manual

 

 

Clean Power You Can Actually Trust

The Rockford Fosgate R2-750X1 is built for people who want real, dependable bass power without guessing games. It is CEA-2006 certified, meaning you get verified 250W RMS at 4 ohms with accurate performance ratings you can actually trust when comparing amps. From there, it steps up hard with 500W RMS at 2 ohms and up to 750W RMS at 1 ohm, giving you the flexibility to match different subwoofer setups while still getting strong, controlled output.

Dialed-In Control for Serious Bass Tuning

This amp gives you full control over how your bass feels and hits. The adjustable infrasonic filter lets you fine-tune between 15 Hz and 40 Hz to protect your subs from damaging ultra-low frequencies, while the built-in low-pass crossover adjusts from 50 Hz to 250 Hz so you can lock in the perfect cutoff. On top of that, the Punch EQ bass boost gives you up to +18 dB at 45 Hz, so when you want that extra kick, it is right there on demand without needing extra gear.

Easy Installation With Real-World Flexibility

The R2-750X1 is designed to make setup smooth and flexible. It supports vertical, horizontal, or inverted mounting, with best cooling performance when installed horizontally. The auto signal turn-on feature makes installation easier by powering on automatically with speaker-level input, so you may not even need a remote turn-on wire in some builds. You also get a wired bass level remote for quick adjustments from the driver’s seat, plus heavy duty 4-gauge power and 8-gauge speaker terminals for solid connections. With nickel plated RCA inputs and pass-through outputs, expanding your system later is clean and simple without redoing your entire setup.

 


Frequently Asked Questions (FAQ)


  • • Why Does the R2-750X1 Clip Even When the Gain Is Turned Down?
    Clipping can still occur if the source signal is already distorted or the amplifier is being pushed beyond its clean operating range. Users have reported clipping on certain bass notes even when the gain was relatively low, making gain structure and source settings important to check.
  • • Why Does the R2-750X1 Suddenly Go Into Protect Mode?
    Unexpected protection can be caused by excessive heat, voltage problems, wiring faults, or an unsuitable speaker load. Real-world R2-750X1 users have reported intermittent protection during driving and heavy bass passages, so checking electrical connections and operating temperature is a good starting point.
  • • Why Does the Bass Cut Out Only on Hard-Hitting Songs?
    Some users have found that short, powerful bass transients can trigger protection even when continuous bass does not. This can point toward voltage drop, impedance-related stress, or amplifier protection reacting to sudden demand.
  • • Why Does My R2-750X1 Get Extremely Hot During Long Listening Sessions?
    Continuous high-power operation can generate substantial heat, particularly when the amplifier is working hard for extended periods. Make sure the amplifier has adequate ventilation and that the connected subwoofer load is within the amplifier's supported range.
  • • Why Does My Subwoofer Sound Distorted With the R2-750X1?
    Distortion may come from incorrect gain, bass boost, crossover settings, or a clipped signal rather than a damaged subwoofer. Users troubleshooting Rockford systems frequently find that resetting the amplifier settings and properly tuning the gain improves the problem.
  • • Why Does the R2-750X1 Work but My Factory Speakers Stop Playing?
    An improperly integrated aftermarket amplifier can interfere with a factory audio system, particularly when tapping speaker-level signals. One R2-750X1 installation reported the factory speakers cutting out shortly after the vehicle began moving, despite the aftermarket amp and sub continuing to operate.
  • • Why Does the R2-750X1 Seem to Have Less Power Than Expected?
    The amplifier's actual performance depends on the subwoofer impedance, electrical supply, signal quality, and gain setup. A recent R2-750X1 owner comparing it with a larger amplifier specifically noted that the 750X1 was already producing substantial power, but wondered whether more amplifier power would improve low-frequency performance.
  • • Why Does the Amplifier Shut Down Even Though the Subwoofer Still Plays Normally?
    A protection event does not automatically mean the subwoofer is damaged. If the woofer continues working normally after the amplifier resets, investigate voltage fluctuations, temperature, grounding, and the speaker load. Users have reported protection events while the subwoofers continued to test and play correctly.
  • • Could a Weak Battery or Poor Electrical Connection Affect the R2-750X1?
    Yes. A weak battery, corroded terminal, inadequate ground, or voltage drop can cause an amplifier to behave unpredictably when bass demand increases. One R2-750X1 user specifically encountered recurring shutdowns after previously finding a loose positive-terminal connection and corrosion.
  • • Why Does My R2-750X1 Sound Fine After Retuning but Start Clipping Again?
    If clipping returns after the system is retuned, check the head-unit EQ, bass boost, source volume, and input signal rather than only adjusting the amplifier gain. User troubleshooting reports show that changing the source EQ can alter when an amplifier begins clipping.

SPECIFICATIONS


  • Number of Channels : 1
  • Frequency Response : 20-250 Hz
  • Built In Crossovers : Yes
  • RMS Power Output : 1x750 Watts
  • Amplifier Class : D
  • Fuse Rating : 120 A

FEATURES


Features:

  • CEA-2006 Certified Performance: Complies with CEA-2006 standards, delivering reliable and accurately measured 250W RMS at 4Ω with verified signal-to-noise performance for consistent amplifier output comparison.
  • High Output Power Capability: Provides 500W RMS at 2Ω and up to 750W RMS at 1Ω, ensuring strong and dynamic bass performance across various subwoofer configurations.
  • Flexible Mounting Orientation: Supports vertical, horizontal, or inverted installation, with optimal cooling achieved when mounted in a traditional horizontal position.
  • Variable Gain Adjustment: Features a rotary gain control accommodating a wide input range from 150mV to 4V line level or 450mV to 12V speaker level for system matching flexibility.
  • Adjustable Infrasonic Filter: Includes a 15-40 Hz variable infrasonic filter with a 12 dB/octave slope to eliminate damaging ultra-low frequencies and protect subwoofers in ported enclosures.
  • Integrated Low-Pass Crossover: Built-in 12 dB/octave low-pass filter adjustable from 50 Hz to 250 Hz for precise subwoofer frequency tuning.
  • Punch EQ Bass Enhancement: Onboard bass boost circuit adjustable from 0 to +18 dB centered at 45 Hz for enhanced low-frequency impact.
  • Auto Signal Turn-On Capability: Automatically powers on when detecting speaker-level input signals, simplifying installation without requiring a remote turn-on lead in certain setups.
  • Included Remote Level Control: Comes with a wired remote bass knob and extended cable, allowing convenient adjustment of subwoofer output from the driver’s seat.
  • Robust Power and Signal Connectivity: Features heavy-duty terminals supporting up to 4-gauge power wire and 8-gauge speaker wire, along with nickel-plated RCA inputs and pass-thru outputs for clean signal transfer and easy system expansion.

 

Specifications:

  • CTA-2006 Compliant
  • Number of Channels: 1
  • Total Power(Sum of Rated Power): 750 Watts
  • Rated Power (RMS Continuous Power)
    • 250 Watts x 1 @ 4Ω
    • 500 Watts x 1 @ 2Ω
    • 750 Watts x 1 @ 1Ω
  • Dynamic Power (PVC/PowerCube®)
    • 300 Watts x 1 @ 4Ω
    • 545 Watts x 1 @ 2Ω
    • 830 Watts x 1 @ 1Ω
  • Bridgeable: No
  • Frequency Response: 20 Hz - 250 Hz
  • Input Sensitivity
    • Low-Level: 150 mV - 4 V
    • High-Level: 450 mV - 12 V
  • Circuit Topology Class: Class-D
  • Total Harmonic Distortion (THD+Noise)
    • 4Ω: <1.0%
    • 2Ω: <1.0%
    • 1Ω: <1.0%
  • Signal Input
    • Low-Level: 2 RCA
    • High-Level: 4-Pin Molex
  • Signal Output
    • Low-Level: 2 RCA (Pass-Thru active with RCA or Hi-Level input)
  • Tone Controls: 0 to +18 dB @ 45 Hz
  • Crossover Controls
    • Low-Pass: 50 Hz - 250 Hz @ 12dB/Octave Butterworth
    • Infrasonic: 15 Hz - 40 Hz @ 12dB/Octave Butterworth
  • Remote Controls: Yes
  • Visual Indicators
    • Power/Protect
    • C.L.E.A.N. In
    • C.L.E.A.N. Out
  • Power Wire Gauge: 4 AWG
  • Power Input Connector: Compression Terminal Block
  • Speaker Wire Gauge: 8 AWG
  • Speaker Output Connector: Compression Terminal Block
  • Cooling: Convection
  • Operating Voltage: 9 - 16 VDC
  • Recommended Fuse (not included): 120 A
  • Max. Current Draw (13.8V Sinewave)71 A
  • Dimensions (H x W x D)
    • 1.9" x 6.8" x 10.1" (4.9 cm x 17.3 cm x 25.5 cm)
  • UPC: 780687355876
  • Weight: 6
  • Authorized Internet Dealer
Warranty: 2 Year(s) Warranty.
This item is accompanied by a manufacturer's warranty. If it is found to be defective, it may be returned to OnlineCarstereo.com for replacement within 2 Year(s) from the original date of purchase with proper return authorization.

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Write a review!
  • Bought for my 2 ohm 300 Watt sub and the pair is delivering positive results. So compact for a 750 Watt sub and the knobs are very responsive. Love the CLEAN technology. The lows are really cleaner compared to my older setup.

    Clyde
    3/21/2024

  • Amp is one of the best ones on the market

    Abe Miller
    12/17/2024

  • Awesome product! More power than it's rated. Get one Rockford never disappoints. This amp is a beast!

    Reginald
    4/28/2025
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