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Rockford Fosgate R500X1D

Prime Series mono subwoofer amplifier — 500 watts RMS x 1 at 2 ohms

74 Reviews | 21 questions - 40 answers

Overview

Our take on the Rockford Fosgate R500X1D

Rockford Fosgate performance in a small package – this Prime Series R500X1D mono amp can drive a sub with up to 500 watts RMS, so you can really feel your bass rockin'. You can use the low-pass filter and Rockford Fosgate's famous Punch boost to get the best possible bass from the sub and enclosure in your vehicle. A phase switch gets your subs firing along with your other speakers for maximum impact, while the speaker-level inputs let you hook this amp up to almost any system, even a factory stereo.

Rockford Fosgate power for your sub

Rockford Fosgate performance in a small package – this Prime Series R500X1D mono amp can drive a sub with up to 500 watts RMS, so you can really feel your bass rockin'. You can use the low-pass filter and Rockford Fosgate's famous Punch boost to get the best possible bass from the sub and enclosure in your vehicle. A phase switch gets your subs firing along with your other speakers for maximum impact, while the speaker-level inputs let you hook this amp up to almost any system, even a factory stereo.

Rugged performance and value

The R500X1D's heavy cast aluminum chassis efficiently draws damaging heat away from its internal components, ensuring reliable, long-term play. The amp's built-in sensors keep track of the output current and power supply temperature, ensuring that plunging subwoofer impedances (they change constantly during play) or even a short circuit won't hurt anything. The included wired remote lets you control the amp's volume level from the front seat. Your driver's seat will become your favorite place for listening once this Prime amp goes to work.

Putting together a bass system with this amp? Check out these Crutchfield-approved single 10" loaded enclosed, single 12" enclosed, and dual loaded enclosed bass packages.

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

Awesome amp. Have it hooked up to two polk db10s and wow they sound insane. Plus the remote for the bass level is nice to have. Overall would 100% recommend

Anonymous, Pleasant hill, CA

What's in the Box:

  • Mono subwoofer amplifier
  • Remote Punch Level Control module
  • 18' Remote Punch Level Control cable (RJ-25 connector on both ends)
  • 6" Speaker level input harness
  • 3mm Allen wrench
  • Four 3/4" Self-tapping screws
  • Two 1/2" Self-tapping screws
  • 4 Flat washers
  • Installation & Operation manual (English/ French/ Spanish/ German/ Italian)
  • Amplifier verification certificate

Product Highlights:

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

Rockford Fosgate R500X1D Reviews

Average Customer Review(s):

(74 Reviews)
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Hands-on research

Product Research

Features
Controls
Connections

Features

Overview: The Rockford Fosgate Prime R500X1D Class D mono amplifier is designed to power subwoofers. The Class D design and extruded aluminum heatsink allows the amplifier to run cool and efficiently, and results in a small footprint.

CEA 2006 Compliant: The R500X1D's power ratings are measured according to the uniform standards advocated by the Consumer Electronics Association (CEA). These standards allow you to accurately compare the rated power output and signal to noise ratio of all CEA 2006-compliant amplifiers, even from different brands. Manufacturers who adhere to these standards can display the CEA 2006 logo on their products and packaging. CEA2006 Specifications for this amplifier are:

  • 4 Ohms: 300 watts RMS x 1 at 4 ohms, 14.4 volts, and less than 1% THD+N
  • 2 Ohms: 500 watts RMS x 1 at 2 ohms, 14.4 volts, and less than 1% THD+N
  • S/N: 80 dB, measured at 1 watt output (100 dB measured at rated power)

LED Indicator: The amplifier is equipped with an LED power/protect indicator. The LED illuminates blue when the unit is turned on. It illuminates red if the thermal or short circuit protection circuit is engaged, and the amplifier will automatically turn off.

Mounting: The amplifier can be mounted vertically or horizontally using the supplied mounting screws. The amplifier should never be mounted in an engine compartment as this will void the warranty.

Controls

Gain Control: Use the amplifier's gain control to match the output of the source unit. The rotary gain control is labeled 1 to 11 and has a sensitivity range of 150mV to 4V when using a preamp level signal, 450mV to 12V when using a speaker level signal.

Remote Punch Level Control: The R500X1D includes a wired Remote Punch Level Control, 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. The Remote Punch Level Control features a rotary dial, and comes with mounting hardware and an 18' cable.

Note: The Remote Punch Level Control measures approximately 1-3/4" wide (2-5/8" including the mounting flange) x 3/4" high x 1-5/8" deep (2-1/8" deep including the knob and wiring).

Crossover: The amplifier is equipped with a 12dB/octave Butterworth low-pass crossover. The crossover point is continuously variable from 50 to 250 Hz. This being a subwoofer amp, the crossover is always engaged.

Phase: The 2-position phase switch allows you to easily reverse the output phase of the amplifier, choose 0° or 180° to match the rest of your vehicle's speaker system.

Punch EQ: The Punch EQ bass boost circuit is adjustable from 0 (min) to +12dB (max) and centered at 45Hz.

Connections

Power Terminals: The power and ground terminals are nickel-plated set screw terminals and will accommodate up to 4 AWG power and ground wires. (Rockford Fosgate recommends 8 AWG minimum.)

Fuse: An external 50-amp fuse (not included) must be installed on the power wire at the battery. If a wiring kit is used which includes a fuse with a value other than 50-amps, the original should be replaced with a 50-amp fuse. When not using a wiring kit, the v6-MANL fuse holder (item number 120MANL, sold separately) and MANL50 50-amp fuse (item number 120MANL50, sold separately) can be used.

Remote Turn-On Terminal: The remote turn-on terminal is a nickel-plated set screw terminal that will accommodate up to an 8 AWG wire. It's used to remotely turn the amplifier on and off.

Speaker Terminals: The one pair of speaker outputs is nickel-plated set screw terminals what will accommodate up to 8 AWG speaker wire.

RCA Input Jacks: The industry standard RCA jacks provide an easy connection for preamp level input. They are nickel-plated to resist signal degradation caused by corrosion.

Speaker Level Input: A speaker level input harness is included, making it easier to add the amplifier to a factory radio or to a receiver with no preamp outputs.

RCA Output Jacks: A pair of RCA pass-thru jacks provides a convenient source for daisy-chaining an additional amplifier without running an extra set of RCA cables from the front of your vehicle to the amplifier location.

Wired Remote: An RJ-25 jack is used with the included Remote Punch Level Control.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Accessories
Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

All the power my 15 needs [ Donna  May 31, 2017 ]
I know people that us this brand, and I need a new one. The one that I one is like 15 years old and is a little tired. [ JOHNNIE  Apr 24, 2017 ]
packaged [ Sean  Mar 29, 2017 ]
Good reviews [ Joseph P.  Mar 17, 2017 ]
It's has everything i wanted and i can upgrade my speakers if i want !! [ mike  Mar 12, 2017 ]
It was matched with the Sub I wanted. [ Paul  Mar 05, 2017 ]
I like Rockford products [ Devin  Feb 23, 2017 ]
Rockford fosgate has always been good for me [ DANIEL  Feb 08, 2017 ]
Gangster rap [ Phillip  Jan 06, 2017 ]
Brand recognition [ TOBY  Dec 27, 2016 ]
Power range and price [ Robert  Dec 07, 2016 ]
This was recommended with the sub package from Rockford Fosgate. I don't understand about pairing subs and amps so the bass packages really simplified things. I like the look of the amp and its from a trusted company. [ Vincent  Dec 04, 2016 ]
Rockford Fosgate always makes top notch stuff right behind JL Imo for the price great bang for your buck product. [ Parker Stephen  Nov 28, 2016 ]
Gift husband [ Shelly  Nov 27, 2016 ]
500 watts it says.... 614 certified when tested... Find me a better amp for the same price that can claim the same. [ Bryce  Nov 18, 2016 ]
Price [ Rodney  Oct 30, 2016 ]
i like the rockford amps [ JAMES  Oct 02, 2016 ]
Gift [ TJ  Sep 30, 2016 ]
Was part of the bass package I purchased. [ Claude  Sep 03, 2016 ]
Best quality [ carlos  Aug 19, 2016 ]
Good reviews and the power we needed [ Wesley  Aug 04, 2016 ]
I love that it comes with a bass control knob and size is cool too. [ CURTIS  Aug 02, 2016 ]
It's a class D which makes it awesome. Had the specs I wanted. [ Jonathan  Jul 25, 2016 ]
FOSGATE IS KNOWN FOR THE DEPENDABLE, AND CLEAN POWER, THAT WILL CONSISTINTLY MAKE MY HEART DROP. [ LONNIE RAY  May 25, 2016 ]
good quality sounds great and not to pricey. [ Tommy  May 20, 2016 ]
I have had Rockford before and loved them. Strong, reliable amps. [ Jack  Apr 01, 2016 ]
Power to spare [ JEFF  Mar 15, 2016 ]
enough power without going overboard [ Jeremy  Mar 08, 2016 ]
Will work best with the sub I chose [ Alie  Feb 25, 2016 ]
Matched for the subwoofer I'm using and as well as its size [ walter  Feb 08, 2016 ]
I've used Rockford fosgate amps in the past and consider them to be top of the line quality for the price [ BRIAN  Jan 28, 2016 ]
Rockford Fosgate Prime entry level mono block at a more affordable price. [ Leandro  Jan 01, 2016 ]
This amp has a lot of features in a fairly small package. And, it was on for a good price. [ Danen  Jan 01, 2016 ]
Advisor recommendation within our budget. [ J  Dec 29, 2015 ]
Reputation [ jamie  Dec 23, 2015 ]
Reputation, match, power [ Jerry  Dec 20, 2015 ]
For its reputation as a great product. [ Matthew  Dec 16, 2015 ]
Quality, powerful, good brand, good price [ Connie  Dec 16, 2015 ]
Powerful and good quality product [ JOHN  Dec 15, 2015 ]
Price and positive reviews [ Randall  Dec 12, 2015 ]
I picked this item based on Rockford Fosgate's history of making good amplifiers and also the reviews I read. [ William  Dec 04, 2015 ]

21 questions already asked

If I remember correctly, the RF R500X1D produces 500 watts at 2 ohms and 250 watts at 4 ohms, so, at 3 ohms it should produce about 375 watts. An amp will push wattage based on the draw of the sub, so there is no adjustment needed to the amp for the 3 ohm resistance. I don't know what the Max. RMS of your JL sub is, but suppose it is 500 watts: it is good practice to power your subs at somewhere between 3/4 and 1 1/2 times the max RMS, so if your sub's max RMS is indeed 500 watts, this amp is about the minimum amount of power necessary to operate it well. On the opposite end of the spectrum, your sub should have a max RMS rating of at least 250 watts to work with this amp. [ Danen  May 30, 2017 ]
You can tap the factory amplified speaker wires to provide the audio signal to the "speaker level input" harness provided with the amplifier. There is no listed "maximum wattage" for the speaker level input signal. Continuous wattage (RMS) from stock systems in generally very low so, even without your vehicle information, I'm confident the amp will work well off the signal provided from your stock subwoofer speaker wire taps. I hope that helps. My Bio: https://www.crutchfield.com/Support/Bio.aspx?bio=5 [ Ryan  May 31, 2017 ]  Staff
The R500X1D is a Mono Block amp intended for powering subwoofers only. It has a single channel input for the sub out RCAs from your head unit. It will not take a 100 watt input. I believe this amp will take either a low level input via RCA cables (generally 3 to 5 watts) or Line Level/Speaker Level inputs, which generally run in the 15 to 22 watt range. To use this amp with your factory system, you will need to bypass the factory amp (or remove it). I don't know the make/model of your vehicle, or the particulars of your system, but Crutchfield sells many devices to integrate aftermarket components into a factory system that allow you to keep factory conveniences, such as steering wheel controls and factory system components. I recommend you call a Crutchfield advisor - they are very friendly and knowledgeable - to determine what you need to do what you want. [ Danen  May 30, 2017 ]
I have this amp and It had more than enough power for my JL 10". I have to have the all the settings at the lowest range so that it doesn't distort the sub. Don't be fooled by the size of this amp, it's loaded with power! However, I would stick with whatever the crutch field advisor suggests for your application, they've never steered me in the wrong direction [ Claw311  May 04, 2017 ]
You should be good this amp is rated at 500 rms at 2 ohms which mean if you wire your subs down to where there going into the amp at a 2 ohm load you will deff be ok the amp is actually underrated when i received this same amp on a bench test my actually put at around 630 rms I belive but that's perfect conditions though but to answer your question yes it will run the 2 12s fine as long as it is wired at 2 ohms [ Trevor  May 04, 2017 ]
The frequency response range of this amplifier is 50-250Hz. Most subsonic frequencies are below 40Hz. This amplifier will not filter frequencies at that level. [ Tobias  Dec 19, 2016 ]
No it does not. [ CALDER GRANT  Dec 19, 2016 ]
You could wire dual voice coil subs to present a 1-ohm load to this amp, but the amp is not rated for stability at that impedance. Therefore, you'll only damage the amp and likely render it useless. [ Tobias  Sep 19, 2016 ]
It is not recommended with this amp. It's a great amp and the birth sheet will always come in higher than rms numbers. But prime amps run hot already so I would stop at dropping below 2 ohms. My birth sheet rms was 654 at 2 ohms rms. [ CALDER GRANT  Sep 19, 2016 ]
I Believe it has plenty of power. I push 2 JL 12" with mine. [ David  Apr 01, 2016 ]
doesn't have enough power for that speaker [ anthony  Apr 01, 2016 ]
No it will short out. [ Leo  Mar 24, 2016 ]
I installed mine in a vat of flourinert and everything seems to be fine! [ Tobias  Mar 23, 2016 ]
Ya to about 100 meters [ Tim  Mar 23, 2016 ]
I doubt it, not really meant for marine use! [ ALBERT  Mar 23, 2016 ]
I would think not, i don't have it installed where water can get to it. [ Clay  Mar 23, 2016 ]
you will need some sort of 12 volt source for the REM lead. weather it be the stereo, the battery or some other configuration. [ JOHN  Mar 01, 2016 ]
yes you need to use remote turn on cause that turns the amp on and off no matter if you using inline are rca inputs [ anthony  Mar 01, 2016 ]
Generally the best way is coming off rear speakers after a factory amp if one exists if no amp then you can tap in anywhere out of the head unit.If u have a mono amp then u only need to hook up one side using hi input(my set up).I bought a signal converter or impedance converter,turned out didn't need it.Added a r.f.500wx1 and a r.f. 12" hooked one side up to my hi input on amp coming off factory Bose back right speaker after amp.I personally think that's the easiest way [ James  Jan 03, 2016 ]
Close to where you are mounting the amp [ Shelly  Jan 03, 2016 ]
If you are mounting the amp In the trunk tap into the rear deck speakers (left, right) [ Claw311  Jan 02, 2016 ]
At the head unit. The wires are labeled front, rear, right & left. [ Carl  Jan 02, 2016 ]
I'm not sure but my guess is no. I think the gain and remote bass knob is different. I haven't gotten the amp hooked up yet but like I said it's just a guess. [ William  Dec 30, 2015 ]
No it overrides it [ DEVIN  Dec 30, 2015 ]
Yes. This is a fantastic amp, however. No need to go higher than 50% [ Aaron  Dec 30, 2015 ]
I Used it in 12" bass and it is good [ sergio  Dec 11, 2015 ]
Probably not. First, you would need a high to low level converter to take the separate high level speaker channel output and make it low level signal input (i.e. RCA cables) to the amp. Secondly, without an LOC you will only amplify de-tuned signal from a factory head unit. Thirdly, frequency response is only 20-250Hz, making this amp purpose built to run subwoofers. There's a bunch of assumptions in my response. Ultimately, yes, you could just use a high to low level converter and get isolated and de-tuned signal through the amp to a set of subs. You will be much better off using an inline LOC though, and more pleased by the sound quality. [ Tobias  Dec 11, 2015 ]
I have seen several instances where it has been mounted vertically and also on the enclosure. [ Heidi  Dec 04, 2015 ]
Yes it ca be mounted vertically and on sub box [ SHERELL M  Dec 03, 2015 ]
Thanks for your question. For information on selecting the best sub for your amp 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 sub models and help you make the best choice for your system. [ Krissy  Sep 04, 2015 ]  Staff
There's only one amp here, what do you mean by both amps? If you're asking how to connect two of these amps to separate subwoofers, then that will require three fuse blocks (one at the battery, coming off the positive lead...and the other two coming off a fuse block in the vehicle cab). You will also need a distribution block for the ground lead off the vehicle chassis and another one for the positive lead off the battery. Recommend at least 4ga. or larger power cable off the vehicle battery and (two) 4-8ga. power cables off the positive lead distribution block. Those two cables will each need to have a fuse block with a 50 amp rated fuse. Off the battery, I'd recommend around a 150 amp fuse block for the 2 ga. positive power cable. Of course, positive lead fuse requirements will depend on the addition of any other amplifiers (say a 4-ch. amp for door speakers). Hope this helps. [ Tobias  May 19, 2015 ]
Thanks for your question. 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. [ Krissy  Feb 20, 2015 ]  Staff
Thanks for your question. 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. [ Krissy  Dec 24, 2014 ]  Staff
500 watts at 2 ohms or 250 watts at 4 ohms. [ Danen  May 30, 2017 ]
Depends on the number of ohms your running. I'm running at 500 watts at 2 ohms. [ Nicklas  Nov 25, 2014 ]
Thanks for your question. For information on selecting the sub I would recommend reaching out to an Advisor by phone (1-800-324-9695). They will be able to help determine the differences between the models and help you make the best choice for your system. [ Krissy  Nov 16, 2014 ]  Staff
I forwarded your question to an Advisor and they responded with the following: This amp isn't a great match for the subwoofer but you will be safer wiring it in series. This will create an 8-ohm load so the amp will be pushing less than 300 watts but that is safer than feeding 500 watts to this subwoofer. If you would like to discuss further you can contact an Advisor directly by phone (1-800-324-9695) or online chat. [ Krissy  Nov 16, 2014 ]  Staff
I forwarded your question to an Advisor and they responded with the following: That amp would not be able to handle two subwoofers as it would only give them 250 watts RMS each. You would need to go with something like the Rockford Fosgate Prime R1200-1D which would give them 400 watts RMS each. If you would like to discuss further you can contact an Advisor directly by phone (1-800-324-9695) or online chat. [ Krissy  Jun 13, 2014 ]  Staff
If you purchased the product from Crutchfield, feel free to contact our Tech Support team. They can walk you through the settings on the product and see if there may be a fix. 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. You can also post your question in our forums: http://community.crutchfield.com. Or try our online support center: http://crutchfield.custhelp.com/app/answers/list/kw/. [ Jeff  Mar 13, 2014 ]  Staff
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