The JL Audio MHD600/4-24V is a genuine, full-range 4-channel Class D marine amplifier built for 24V negative-ground vessels. It uses JL Audio’s Single-Cycle Control™ switching design and a tightly regulated R.I.P.S. power supply to deliver consistent output with excellent sound quality across a wide range of speaker loads.

• Rated power (RMS): 150W x 4 @ 1.5–4Ω (22–29V)
• Bridged power (RMS): 300W x 2 @ 3–8Ω (22–29V)
• Frequency response: 6 Hz – 30 kHz (+0/−1 dB)
• Crossovers: Front & Rear filter sets; High-Pass or Low-Pass; 12 dB/oct Butterworth or 24 dB/oct Linkwitz-Riley; 50–500 Hz; defeatable
• Inputs: Differential-balanced RCA (Front/Rear); selectable 200 mV–2 V (Low) or 800 mV–8 V (High); 2/4-channel input mode
• Preamp outputs: 2-channel buffered pass-through; selectable “Front” only or summed (Front+Rear)
• Electrical: Recommended main fuse 25A (AFS/AGU/MaxiFuse™); accepts 8–4 AWG power/ground (8 AWG minimum recommended)
• Chassis size (L×W×H): 10.74" × 7.85" × 1.93" (273 × 199.5 × 49 mm), excluding connectors
• Marine-ready construction: Powder-coated chassis, gasketed control cover and corrosion-resistant hardware (designed for marine use, but not waterproof)
• Optional accessories: JL Audio HD-RLC remote level controller; HD Stack Kit for stacking compatible HD/MHD amplifiers

OEM references: MHD600/4-24V / 600/4-24V (JL Audio item no. 98227). TMP Global SKU: JLMHD600/4-24V.

Before ordering, confirm ratings, impedance load, wiring and fitment for your specific vessel. If you’re unsure which speakers, wiring or additional amplifiers to pair with this unit, contact our parts experts.