Rockford Fosgate R21200X1 Prime Amp 900W at 2Ohm /200W at 1Ohm

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Prime 1200 Watt Mono Amplifier


Primed for Performance, the R2-1200X1 amplifier is a 1200 watt, class-D, capable of operating at 4Ω, 2Ω or 1Ω mono. This amplifier is extremely efficient because of its class D technology which reduces demand on the vehicles electrical system. The amp also features C.L.E.A.N. circuitry to help you adjust your gain settings, a P.O.W.E.R. Supply that generates more power as voltage increases, and integrated Punch EQ that corrects for acoustic deficiencies while delivering up to 3X the bass. For subwoofers, a variable infrasonic filter and remote level control allows you to tune the bass for the desired level for the music.


CEA-2006 CompliantCEA-2006 GuidelinesCEA-2006 Power Rating

400W x 1 @ 4Ω

≤1.0% THD+N

Number of Channels1

Total Power

(Sum of Rated Power)1200 Watts

Rated Power

(RMS Continuous Power)400 Watts x 1 @ 4Ω

800 Watts x 1 @ 2Ω

1200 Watts x 1 @ 1Ω

Dynamic Power

(PVC/PowerCube®)489 Watts x 1 @ 4Ω

889 Watts x 1 @ 2Ω

1389 Watts x 1 @ 1Ω


Frequency Response20 Hz - 250 Hz

Input SensitivityLow-Level: 150 mV - 4 V

High-Level: 450 mV - 12 V

Circuit Topology ClassClass D

Efficiency (average)

Total Harmonic Distortion (THD+Noise)4Ω: <1.0%

2Ω: <1.0%

1Ω: <1.0%

Signal InputLow-Level: 2 RCA

High-Level: 4-Pin Molex

Signal OutputLow-Level: 2 RCA

Tone Controls0 to +18 dB @ 45 Hz

Crossover ControlsLow-Pass: 50 Hz - 250 Hz @ 12dB/Octave Butterworth

Sub Infrasonic: 15 Hz - 40 Hz @ 12dB/Octave Butterworth

Remote ControlsYes

Visual IndicatorsPower/Protect

C.L.E.A.N. In

C.L.E.A.N. Out

Power Wire Gauge4 AWG

Power Input ConnectorCompression Terminal Block

Speaker Wire Gauge8 AWG

Speaker Output ConnectorCompression Terminal Block



Operating Voltage9 - 16 VDC

Recommended Fuse

(not included)200 A

Average Current Draw (13.8V Music)

Max. Current Draw (13.8V Sinewave)121 A

Suggested Alternator

Dimensional Diagram

Dimensions (H x W x D)1.9" x 6.8" x 11.3"

(4.9 cm x 17.3 cm x 28.5 cm)

Extra Information

Rockford Fosgate

2 Reviews

  • Posted by Seth gehan on 27th Sep 2022



    Love it

  • Posted by Seth gehan on 27th Sep 2022



    Love it