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Rockford Fosgate Prime R750-1D

Mono subwoofer amplifier — 750 watts RMS x 1 at 1 ohm

Item # 575R7501D

Rockford Fosgate packs more power per square inch into their Prime Class D amps than almost any other amplifier...

Rockford Fosgate packs more power per square inch into their Prime Class D amps than almost any other amplifier...

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About the Rockford Fosgate Prime R750-1D

Rockford Fosgate packs more power per square inch into their Prime Class D amps than almost any other amplifier made, so you can put more music power in your vehicle's limited space. Your bass will hit loud and clear with one of these reliable and cool-running amps. The versatile R750-1D puts out 250 watts RMS to a 4-ohm sub, but will crank out 750 watts RMS when it's running a 1-ohm subwoofer setup.

Rockford Fosgate packs more power per square inch into their Prime Class D amps than almost any other amplifier made, so you can put more music power in your vehicle's limited space. Your bass will hit loud and clear with one of these reliable and cool-running amps. The versatile R750-1D puts out 250 watts RMS to a 4-ohm sub, but will crank out 750 watts RMS when it's running a 1-ohm subwoofer setup.

Clean power, extensive controls
Rockford Fosgate designed this Prime amp to deliver Power Output Without Excessive Regulation (POWER), which means it'll respond quickly to the peak demands that you may throw at your system. Low-pass and subsonic filters, along with Rockford Fosgate's famous Punch bass boost, let you tune your subs for maximum performance, so your driver's seat will become your favorite place to pick up the beat. And, speaking of the driver's seat, you can hook up an optional wired remote knob to get fingertip control over this amp's bass impact.

Confused about impedance? Check out our article on matching subs and amps.

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Product highlights:

  • mono subwoofer amplifier
  • 250 watts RMS x 1 at 4 ohms (500 watts RMS x 1 at 2 ohms)
  • 750 watts RMS x 1 at 1 ohm
  • CEA-2006 compliant
  • variable low-pass filter (50-250 Hz, 12 dB/octave)
  • variable subsonic filter (15-40 Hz, 12 dB/octave)
  • variable Punch bass boost (0-18 dB at 45 Hz)
  • included wired remote Punch Level Control
  • Class-D amplifier design
  • MOSFET power and output stages
  • frequency response: 20-250 Hz
  • preamp-level inputs and outputs
  • 4-gauge power and ground leads recommended — wiring and hardware not included with amplifier
  • no onboard fuses — when installing multiple amps in a system, an additional 60-amp in-line fuse between the distribution block and the amplifier is recommended
  • 9-1/8"W x 2"H x 7-3/8"D
  • warranty: 1 year
  • Our 60-day money-back guarantee
  • MFR # R750-1D

What's in the box:

  • Mono subwoofer amplifier
  • Punch Level Control module
  • 16.5' Punch Level Control cable terminated by an RJ25 connector on each end
  • 2 Small self-tapping screws (1/2" length)
  • 4 Large self-tapping screws (1-1/2" length)
  • 3mm Allen wrench
  • Installation & Operation Manual (Eng / Spa / Fre / Ger / Ita)
  • Amplifier Verification Certificate

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Rockford Fosgate Prime R750-1D reviews

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Features
Controls
Connections

Features

Overview: The Rockford Fosgate Prime R750-1D is a mono Class D amplifier. It is optimized to power subwoofers, and 1-ohm stable. The Class D design is very efficient with a cast aluminum heatsink to keep it in a small footprint. The amplifier has 85% average efficiency at 4-ohms or 2-ohms, and 80% at 1-ohm.

CEA 2006 Compliant: The R750-1D's power ratings are measured according to the strict standards dictated by the Consumer Electronics Association (CEA). These standards allow you to accurately compare the rated power output of all CEA 2006-compliant amplifiers, even different brands. Manufacturers who adhere to the standards can display the CEA 2006 logo on their products and packaging. The RMS power output is as follows (measured with a 14.4 volt input, <1% THD+N, 20 Hz-250 Hz):

  • 4-Ohm: 250 watts x 1
  • 2-Ohm: 500 watts x 1
  • 1-Ohm: 750 watts x 1

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

Controls: The R750-1D has the following top-mounted controls:

  • Gain Control: a rotary gain control that can be adjusted from 1 to 11
  • Low Pass Filter: a 12 dB/octave Butterworth low pass filter with a crossover point variable from 50 Hz to 250 Hz
  • Infrasonic Filter: a variable 15-40Hz, 12 dB/octave infrasonic filter designed to prevent frequencies below the audio range from being applied to the subwoofer
  • Punch EQ: a rotary bass boost control, centered at 45 Hz, from 0 dB to +18 dB

Remote Punch Level Control: The amplifier includes a wired Remote Punch Level Control, which is linked to the gain control of the amplifier. The module allows you to remotely control the output level of the amplifier from the dash or center console of your vehicle. The Remote Punch Level Control features a rotary dial, and comes with mounting hardware and a 16.5' connector cable.

Connections

Terminals: The amplifier features heavy duty, nickel-plated set-screw terminals. The set screws can be tightened or loosened with the supplied 3mm Allen wrench. The terminals include:

  • Power/Ground: will accommodate up to 4-gauge wire
  • Remote Turn-On: will accommodate up to 8-gauge wire
  • Speaker Terminals: will accommodate up to 8-gauge wire. Two Positive (+) and Negative (-) terminals are provided for installation flexibility. Both terminals are wired in parallel internally.

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

RCA Input Jack: The RCA input jacks 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.

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Customer Q&A

Q
Crutchfield asked: Why did you buy this?
A
Trusted brand for years! [ Peter  Aug 30, 2019 ]
A
Cost Effective RF Brand Underrated amp RF Reliability [ Brian  Apr 10, 2019 ]
A
1 ohm stable, perfect power for the subs I ordered. [ Dustin  Aug 08, 2018 ]
A
Expert recommended [ Ryan  Jan 16, 2018 ]
A
Recommended by Bryce [ Katie-Belle  Sep 04, 2017 ]
A
Talked to Adam he said it was good for the sub I just ordered from u [ CHESTER  Jul 05, 2017 ]
A
I choose this because of the variable subsonic filter and 1 ohm stability. [ Mark  May 26, 2016 ]
A
To add to factory installed amp [ Kervin  Dec 26, 2015 ]
A
To pair with the RF P2-2X12 speakers [ CHARLES  Dec 17, 2015 ]
A
The Fosgate amp was suggested by the Crutchfield technical support representative as a reasonable mid price range amp that supported the duel 12" subwoofer speaker selection. [ Howard  Dec 05, 2015 ]
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6 questions already asked

Q
Can you show me how to bridge this to 1 ohm mono I'm trying to push two 15s to 1 ohm and I don't know how to bridge it please give me simple instructions thank you for your support?
[ Ronnie  May 21, 2019 ]
1 answer
A
If you purchased the product from Crutchfield, feel free to contact our Tech Support team. Our toll-free Tech Support number is printed on your invoice, and is also available under the "My Orders" tab in the "My Account" section of our website. If you did not purchase the unit from Crutchfield, then you may want to contact the manufacturer.
[ Krissy  May 29, 2019 ]  Staff
Q
Will this amp be able to run a single 12'' p3 rated @ 300-600rms 2ohms or 4ohms which ever. And will this dim the light of a 2016 lancer?
[ hdt  May 17, 2019 ]
2 answers
A
Without a doubt. Its an AWESOME amp. I have 2 12" 500 rms 1000w max kickers at 4ohms hooked up to it and absolutely sounds amazing so u should be fine. You will love it. Best amp ive ever owned
[ Michael  May 30, 2019 ]
A
ya i run one on my 15" p3 1 ohm and if your lights dim you'll need a bigger battery it all depends on your car
[ tanner  May 28, 2019 ]
Q
What input do I use? It has 4 RCA inputs.
[ Matthew  Dec 11, 2018 ]
4 answers
A
It should be the top one the other is a pass threw to run to another amp
[ Ron  Dec 11, 2018 ]
A
There is actually only one Stereo (Left and Right) Line Level Input. The other set of RCA's is a Loop-Through Output. This would be used, for example, if you were chaining together multiple amps. Hope this helps.
[ David  Dec 11, 2018 ]
A
Use the "input" if it's going straight to your music source like your head unit and use the Throughput" if you are running the signal from this amp to another amp
[ Kurtis  Dec 11, 2018 ]
A
rca
[ Stephen  Dec 11, 2018 ]
Q
will this amp be a good choice to run 2 jl audio 12w3v3.4 speakers in a sealed under seat enclosure?
[ phil  Nov 28, 2018 ]
4 answers
A
I'm not familiar with the speaker. The amp is running two Kicker 4 ohm 10's (bridged mono) and it has PLENTY of power.
[ Juan  Dec 05, 2018 ]
A
To be honest I honest with you I don't know I haven't hooked it up yet but my buddy that picked it out use to have a sponsor through crutchfild so he knows what he is doing when it comes down to it I'm looking it up to 2 two jl tens and forur jl door speakers in my 97 f150 and he said he would be able to get it to hit at one ohm so
[ casey  Dec 03, 2018 ]
A
Yes I believe it would work just fine for a intermediate smooth bass system with a quality built box. If your looking to get loud a little more power wouldn't hurt.
[ Ryan  Dec 03, 2018 ]
A
I believe you'll be happy with the performance of this amp. The one I have is 833 watts rms pushing a rockford fosgate p3 1x 12 at 1 ohm. The amp is only turned half way up and it HITS HARD! I would LOVE to hear it turned up higher with your two JL Audio subs!!!
[ Torie  Dec 03, 2018 ]
Q
What subs should i get for this amp?
[ Alana  Nov 27, 2017 ]
3 answers
A
I got a 10 inch Rockford P 3 and wired it at 1 ohm. A 12 inch P 3 would be awesome also. Will need 1000 watt max ratings to handle all the power. So crisp and clean power! Go for it you will be happy!
[ Andrew  Nov 27, 2017 ]
A
You can get the pre-loaded box with the Rockford fosgate P3 x 1 and that should be more than enough. That's what i have on my 2006 Honda Accord.
[ Alexis  Nov 27, 2017 ]
A
I am running a Rockford fosgate P3 10 in a ported box with this amp and it hits hard in my Mercury grand Marquis great amp well under rated check it out on you tube under amp test Tuesday it will push over 1200 watts RMS .
[ Tracy  Nov 27, 2017 ]
Q
Its a monoblock amp. Why does it have an A and B speaker out. And what is the right wY to get 2 ohms out of it?
[ Chris  Feb 16, 2014 ]
1 answer
A
Speaker Terminals: will accommodate up to 8-gauge wire. Two Positive (+) and Negative (-) terminals are provided for installation flexibility. Both terminals are wired in parallel internally. The right way to get to 2-ohms will depend on your subwoofer set-up. For information on selecting the best amp for your subs 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.
[ Jeff  Feb 17, 2014 ]  Staff
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