The JL Audio MX300/1 is a compact, marine/powersports-ready Class D monoblock amplifier built for clean subwoofer power in tight installations. With a corrosion-resistant cast-aluminum chassis and IPX7 water-resistance, it’s a strong choice for boats, UTVs and other harsh environments.

• Power output (14.4V, RMS): 300W x 1 @ 2Ω / 220W x 1 @ 3Ω / 160W x 1 @ 4Ω
• Amplifier topology: Class D (JL Audio NexD™ switching design)
• Frequency response: 20 Hz – 12 kHz
• Low-pass crossover: 40–400 Hz, 24 dB/octave (defeatable)
• Infrasonic (subsonic) filter: 20–40 Hz, variable
• Bass boost: 0 to +12 dB @ 43 Hz
• Output polarity: 0 / 180° switch
• Inputs: dual-range section accepts line-level and speaker-level signals
• Water & corrosion protection: IPX7-rated chassis, gasketed control cover, stainless hardware
• Dimensions (H x W x D): 1.77 in x 8.66 in x 3.09 in (45 x 220 x 78.5 mm)

OEM / identification: JL Audio part number 98406 (model: MX300/1). Supplier: Recmar.

Compatible accessory (optional): JL Audio M-RBC-1 water-resistant remote bass level control (for MX monoblocks in low-pass mode).

Before ordering: confirm impedance, ratings, wiring/fusing requirements and installation fitment for your vessel/system to avoid damage.