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Power for your bass that'll fit almost anywhere

The Prime Series R250-1D mono amp gives you Rockford Fosgate performance in an incredibly small package, driving your subs with clean power to fill your car with great bass. This workhorse amp delivers up to 250 watts RMS so it's a great match for smaller subs or more efficient large subs. Use the low-pass filter and Rockford Fosgate's famous Punch bass boost to adjust the amp to work best with your enclosure and vehicle. A phase switch gets your subs to work together with the rest of your car's audio system for maximum impact.

R250-1D control panel

Performance and value

Rockford Fosgate designed Prime amps to deliver Power Output Without Excessive Regulation (POWER), which means they'll respond quickly to the peak demands that you may throw at your system. 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 compact Prime amp goes to work.

Product Highlights:

  • mono subwoofer amplifier
  • 150 watts RMS x 1 at 4 ohms (250 watts RMS x 1 at 2 ohms)
  • CEA-2006 compliant
  • variable low-pass filter 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 and output stages
  • preamp inputs and outputs
  • 8-gauge power and ground leads recommended — wiring and hardware not included with amplifier
  • fuse rating: 25A x 1
  • 7-11/16"W x 2-7/16"H x 7-11/16"D
  • warranty: 1 year
  • Our 60-day money-back guarantee

My system has plenty of power. Who needs an amp?

You might think you don't need an amp because you have a 400-watt system in your car, or because your new stereo puts out 50 watts a channel. But those are peak wattage ratings, which may boil down to 15 or 20 watts per channel, using the more realistic RMS rating. An amp sends your speakers the power they need to deliver your music with clarity and impact, whether you're using factory speakers or high-performance components. And low-frequency reproduction requires lots of power, so an amp is an absolute must if you're adding a sub to your system.

Rockford Fosgate Prime R250-1D Reviews

Average Customer Review:

1 Review


Written by: Busta from Waycross ga. on April 16, 2013

Crutchfield Customer Review (What's this?)

I was real skeptical about buying this amp because I was just looking for a little bass and didn't think it would do but it exceeded my expectations

Pros: None

Cons: Worth the buy

Hands-on research

What's in the box?

Download owner's manual

  • Mono amplifier with 25A ATC fuse installed
  • Spare 25A ATC fuse
  • Punch Level Control module
  • 16.5' Punch Level Control cable terminated by a male 3.5mm connector on each end
  • Mounting bracket
  • Two 3mm x 10mm Punch Level Control mounting screws
  • Four 4mm x 20mm self-tapping screws
  • 4 Flat washers
  • Installation & Operation manual

Product Research



Overview: The Rockford Fosgate Prime R250-1D mono Class D amplifier is designed to power subwoofers. The Class D design and extruded aluminum heatsink allows the amplifier to run cool and efficient, and results in a small footprint.

CEA 2006 Compliant: The R250-1D's power ratings are measured according to standards provided by the Consumer Electronics Association (CEA). These standards allow you to accurately compare the rated power output of all CEA 2006-compliant amplifiers, even if they come from different brands. Manufacturers who adhere to the standards can display the CEA 2006 logo on their products and packaging. CEA2006 Specifications for this amplifier are:

  • 4 Ohms: 125 watts RMS x 1 at 4 ohms, 14.4 V, and 1% THD+N
  • 2 Ohms: 250 Watts x 1 at 2 ohms, 14.4 V, and 1% THD+N

LED Indicators: The amplifier is equipped with two side-mounted LED indicators:

  • Power LED: illuminates blue when the unit is turned on.
  • Protect LED: illuminates red if a short circuit or too low of an impedance is detected at the speaker connections. The amplifier will automatically shut down if this occurs.

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.


Gain Control: The amplifier's gain control is preset to match the output of most source units. The gain control can be adjusted from 1 to 11 with an input sensitivity range of 150mV to 8V.

Punch Level Control: The R250-1D 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.

Low Pass Filter: The amplifier is equipped with a 12dB/octave Butterworth low-pass filter. You can adjust the low-pass frequency between 50 Hz and 250 Hz.

Phase: The 2-way phase switch allows you to select the output phase of the amplifier between 0-degrees and 180-degrees to match the rest of your vehicle's speaker system.

Punch Bass: The Punch bass control on the amplifier is adjustable from 0 (min) to 12dB (max) at 45Hz (fixed).


Power Terminals: The power and ground terminals are nickel-plated screw terminals and will accommodate up to 4 AWG power/ground wire (up to 1/2" spade or ring-style connector).

Note: Based on the 25A fuse rating and the power output of the amplifier, an 8-gauge amplifier wiring kit is recommended.

Remote Turn-On Terminal: The remote turn-on terminal is a nickel-plated screw terminal that will accommodate up to an 8 AWG wire (up 3/8" spade or ring-style connector). This terminal is used to remotely turn-on and turn-off the amplifier when +12V DC is applied, when connected to your head unit's remote turn-on lead.

Speaker Terminals: The speaker terminals are heavy duty, nickel-plated screw-terminals what will accommodate up to 8 AWG speaker wire (up to 3/8" spade or ring-style connectors). There are two pairs of speaker terminals which are paralleled internally. This allows you to connect a single 4-ohm or a single 2-ohm subwoofer, or two 4-ohm subwoofers.

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

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 cable from the front of your vehicle to the rear amplifier location.

Fuse: The amplifier is equipped with one installed 25-amp ATC fuse. The amplifier also comes supplied with a spare 25-amp fuse.

Our Product Research Team

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