Prime 500 Watt Class-D Mono Amplifier R500X1D

The Prime R500X1D is a 500 watt mono amplifier using efficient Class-D circuit topology. This amplifier is capable of running a 2-Ohm load and includes on-board Punch Bass and remote Punch Level Control.

• This model replaced by the R2-500X1

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5 Reviews

Are you ready for a dedicated subwoofer amplifier for your car or truck? The Prime R500X1D is the perfect companion for any Car Audio Fanatic getting into mobile audio who wants a two-amplifier system: one amp running mids/highs and the second running subwoofers. This class D mono amplifier features variable Punch Bass, variable crossovers, Pass-Thru jacks to daisy chain another amplifier, and a remote Punch Level Control for mounting under the dash or the center console.

Looking for more options? Check out all of our car audio amps here.

  • 12dB/octave Butterworth crossover
  • RCA pass-thru outputs
  • High level inputs
  • On-board Punch EQ with +18dB boost @ 45Hz
  • Remote PLC (Punch Level Control)
  • 0°/180° Phase Switch
  • Real time output and power supply thermal sensing
  • Cast aluminum heatsink
  • 4 Gauge power/ground connectors
  • MOSFET power supply
  • Over current protection
  • Short circuit protection
  • Muted turn on
  • 1 Year Warranty
CTA-2006 Compliant

Power ratings on Rockford Fosgate amplifiers conform to CTA-2006 industry standards. These guidelines mean your amplifier's ...

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CE Compliant

This product fulfills all essential safety and environmental requirements as defined in the European Directives (768/2008 ...

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High efficiency amplifier design that reduces current consumption from the charging system.

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CEA-2006 Compliant
CEA-2006 Guidelines CEA-2006 Power Rating
300W x 1 @ 4Ω
≤1.0% THD+N
Cta-2006 Compliant
Number of Channels
Total Power
(Sum of Rated Power)
500 Watts RMS
Rated Power
(RMS Continuous Power)
300 Watts x 1 @ 4-Ohms
500 Watts x 1 @ 2-Ohms
Dynamic Power
333 Watts x 1 @ 4-Ohms 0° Res
647 Watts x 1 @ 2-Ohms 0° Res
Frequency Response
20Hz to 250Hz +/-1dB
Input Sensitivity
150 mV to 4 V
Circuit Topology Class
Class D
Efficiency (average)
89% @ 4-Ohm
Total Harmonic Distortion (THD+Noise)
4-Ohm: <1.0%
2-Ohm: <1.0%
Signal Input
High Level: 4-pin molex
Low Level: 1 RCA Pair
Signal Output
Low Level: 1 RCA Pair
Tone Controls
Punch Bass: 0dB to +12dB @ 45Hz
Phase Control: Variable 0° to 180°
Crossover Controls
Low-Pass (LP): 50Hz to 250Hz @ 12dB/octave Butterworth
Remote Controls
Punch Level Control:
When connected is linked to "gain control" to provide remote output level
Visual Indicators
Power Wire Gauge
Power Input Connector
Screw Terminal
Speaker Wire Gauge
Speaker Output Connector
Screw Terminal
Operating Voltage
9 - 16 VDC
Recommended Fuse
(not included)
50 A
Average Current Draw (13.8V Music)
25 A
Max. Current Draw (13.8V Sinewave)
50 A
Suggested Alternator
75 A
Dimensional Diagram
Dimensions (H x W x D)
1.98 x 6.77 x 8.5 (in)
5.02 x 17.19 x 21.59 (cm)
Shipping Weight
5.1 Lbs. (2.31 Kg.)

Return Authorization

Contact the Authorized Rockford Fosgate Dealer you purchased this product from. If you need further assistance, call 1-800-669-9899 for Rockford Customer Service. You must obtain an RA# (Return Authorization number) to return any product to Rockford Fosgate. You are responsible for shipment of product to Rockford.

Accessories Wiring Wizard

Available Wiring Diagrams

Please consult your amplifier owner's manual for lowest recommended impedance.

The below diagrams optimize this amp for its lowest recommended MONO load.

Wiring Diagram #1

Wiring Diagram #2

Wiring Diagram #3

Wiring Diagram #4

Wiring Diagram #5

Wiring Diagram #6

Wiring Diagram #7

Wiring Diagram #8

Wiring Diagram #9

Wiring Diagram #10

Wiring Diagram #11

Speaker Polarity

Your woofer may use one of the following to identify (+/-) terminals.

Positive +

Red Post

Purple (4Ω)

Red (8Ω)

Negative -

Black Post

No Dot

No Dot

Speaker Polarity

Your woofer may use one of the following to identify (+/-) terminals.

Positive +

Red Post

Purple (4Ω)

Red (8Ω)

Negative -

Black Post

No Dot

No Dot


Best bang for your buck.

Good things come in small packages is an understatement for this amp. I have had this amp for 2 years and it is very reliable. I went on many road trips and bump the whole way. After 5 hours the amp is never even gets hot. I recommend this amp to everyone.

Best amp for the $

I bought 2 of them thinking I would need both. Boy was I wrong! I have pushed 2 12s, a few single dual voice coil big boys, and it has always done great. I sold the other one to a younger boy and we put it on his 2 12in fosgate p3s. Perfect match .Love it. Keep up the good work. P.S.-I need a remote for mine.

Awesome Amp!

Just got mine yesterday, I paired it with an Audison 10" Sub. After the install, the technician said it was pushing 650 RMS! It sounds amazing, great product.


Great little amp. I'm using mine to push two 10" JL Audio Subwoofers. Been using it for almost two years now, no problems at all. More then enough power, in fact I've got so much power to spare. Have to turn the gain almost all the way down to 1/4 of the max. Great clean thumping sound that compliments my factory Bose stereo system in my Chevy Silverado. Would DEFINITELY purchase again.

Little monster

Ijust put a P3D4-12 in and was debating between this and the R1200. Let me say if you're on a budget, this tiny little guy is a beast!!! Its birth cert. Says 648rms and it is rocking my p3. All knobs are in easy to reach places, I have nothing bad to say about this amp. Will only recommend RF to others


5 Reviews
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