Rockford Fosgate R2-300X4 Prime 300-Watt 4-Channel Car Amplifier

Upgrade your car audio with the Rockford Fosgate R2-300X4 Prime amplifier. This compact 4-channel class-D powerhouse fits in tight spaces and delivers 300 Watts RMS, giving your front and rear speakers the power they deserve without overloading your vehicle’s electrical system.

Smart engineering keeps performance consistent as voltage fluctuates. The amp supports four independent channels or two bridged channels to drive a larger sub or midbass, depending on your setup. In bridged mode at 4Ω, you can access up to 150W per bridged pair, making the most of your speakers’ potential.

Power, efficiency, and design

• Class-D efficiency reduces drain on the alternator and battery while preserving dynamic headroom.
• RMS power rating: 50W x4 @ 4Ω, 75W x4 @ 2Ω, or 150W x2 bridged/mono @ 4Ω.
• PUNCH EQ helps reinforce bass presence and compensate for room acoustic deficiencies without overwhelming the rest of the mix.

Tuning, inputs, and installation

• Fully adjustable 12 dB/octave high-pass and low-pass Butterworth crossovers for precise tonal shaping.
• Balanced differential inputs with RCA pass-through outputs, plus high-level input support for versatile installations.
• Defeatable auto turn-on and top-mounted controls for easy access during setup and adjustments.

With a compact footprint (about 1.9" tall, 6.8" wide, 10.1" deep) and Rockford Fosgate’s renowned build quality, the R2-300X4 is designed to fit a broad range of vehicles and installer preferences. A standard 1-year warranty adds peace of mind for daily use and weekend projects alike.

In daily driving, you may enjoy steadier bass, clearer dialogue, and more balanced sound across the vehicle’s cabin, without sacrificing space or reliability. The combination of efficient Class-D operation, flexible channel configuration, and tunable crossovers makes this amplifier a versatile choice for upgrading factory audio or building a more capable, multi-zone sound system.