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The Rockford Fosgate PBR300X4 300 Watt 4-channel Amplifier (4 pack) is designed for compact subwoofer systems. It is perfect for motorcycles, ATV's, and hybid-electric vehicles and it won't drain a lot of juice from your electrical system. This amp features: a MOSFET output stage, high level inputs, an ultra compact chassis, Boosted Rail Technology (BRT) which is an ultra efficient design that doesn't even use a switching power supply to generate its 300 Watts of power, NOMAD technology that protects the amplifier from shorting speaker wires and low speaker impedances, Dynamic Thermal Management (DTM) that evenly distributes excess heat across the entire amplifier heatsink, an onboard equalizer, and this amplifier is CEA-2006 compliant that means the amplifier's output power ratings are REAL POWER numbers, not inflated marketing ratings. Cruise around in your motorcycle or recreational vehicle with thumping bass powered by the Rockford Fosgate PBR300X4 300 Watt 4-Channel Amplifier!
NEW Rockford Fosgate PBR300X4 300 Watt 4-Channel Amplifier for Compact Sub Systems (4 pack)
Rated Power:
75 Watts x 4 @ 4-Ohm (This amplifier is only capable of operation at 4-Ohms)
Total Power:
300 Watts RMS
Dynamic Power:
300 Watts x 4 @ 4-Ohms
Channels: 4
Crossover Controls: Selectable 80Hz LP/AP/80Hz HP @ 12dB/Octave
Signal Input:
Hi-Level: Variable DC offset sensitivity
High-Level: harness
Low-Level: 2 Pair RCA
Power Input Connector: Block harness
Power Wire Gauge: 10 AWG
Speaker Output Connector: Harness
Speaker Wire Gauge: Harness 16 AWG
Heat Sink Type: Extruded aluminum
Cooling: Convection
Visual Indicators: Power/Protect, Boost
Circuit Topology Class: Class-BR
Frequency Response: 20Hz
2kHz +/-1dB
Dimensions: 1.53" (H) x 4.25" (W) x 6.75" (L) (3.90cm x 10.8cm x 17.2cm)
Weight: 2.5 lbs
Condition: BRAND NEW!
Part Number: PBR300X4
Warranty: 2 Year VMInnovations Warranty
Quantity: 4
High-Powered Versatility: Delivers a total of 1200W RMS power (300W per amp), with 4-channel configurations perfect for powering speakers or subwoofers.
Boosted Rail Technology (BRT): Maximizes efficiency and power output in a compact design, ideal for installations where space is limited.
Flexible Configuration: Supports stereo, bridged, or mixed-mode operation, allowing customization for various audio system setups.
Durable and Reliable: Built with premium components for consistent performance and long-lasting durability under demanding conditions.
Compact Design: Slim profile ensures seamless integration into tight spaces, without compromising on power or audio quality.
Q: What is the Rockford Fosgate PBR300X4 (4 Pack)?
A: This package includes four 300W 4-channel amplifiers, perfect for compact subwoofer systems or multi-speaker configurations, offering premium audio performance in a small form factor.
Q: What are the key features?
A: Features include Class A/B topology for high-quality sound, Dynamic Thermal Management for efficient cooling, and a compact design for flexible installation in tight spaces.
Q: Is it suitable for multi-component systems?
A: Yes, its 4-channel design supports a variety of setups, including powering multiple speakers or combining with subwoofers for balanced audio.
Q: Why choose this 4-pack?
A: It’s a cost-effective solution for building powerful, space-saving audio systems in multiple vehicles or complex installations.














