The Rockford Fosgate PM300X1 is a compact, full-range mono amplifier rated at 300 Watts, engineered specifically for marine and motorsport environments where heat, moisture, vibration, and corrosion are daily realities. Powered by Class A/B topology, it delivers clean, punchy output with 200W RMS at 4 ohms and 300W RMS at 2 ohms making it equally at home driving a dedicated subwoofer or a centre channel speaker on a boat, jet ski, dune buggy, or off-road rig.
What sets the PM300X1 apart from standard car amplifiers is its marine-grade construction: conformal-coated circuit boards, stainless steel hardware, and a cast aluminium heatsink that manages heat through convection. The stealth top-mounted control panel keeps adjustments clean and accessible, while the compact chassis opens up installation possibilities in tight spaces where full-size amplifiers simply won't fit ideal for under-seat and under-gunwale mounting in Australian watercraft and 4WD builds.
Key Specifications
Rated power: 200W x 1 @ 4 ohms (CEA-2006, ≤1.0% THD+N)
Rated power: 300W x 1 @ 2 ohms
Total power (sum of rated): 300 Watts
Dynamic power: 260W x 1 @ 4 ohms / 444W x 1 @ 2 ohms (PowerCube®)
CEA-2006 compliant
Class A/B circuit topology
Frequency response: 20 Hz – 20 kHz ± 1.0 dB
THD + Noise: <1.0% at both 4 ohm and 2 ohm
Input sensitivity: 150 mV – 12 V (hi/low level)
Dimensions (H x W x D): 60.5 x 197.1 x 250.4 mm
Shipping weight: 4.30 kg