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4-Channel Class D Marine Amplifier JL Audio Genuine, 280W RMS, OEM MHX280/4 (98403)

JLMHX280/4

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Product Specifications and Features

The JL Audio MHX280/4 is a genuine compact, full-range 4-channel Class D marine amplifier engineered for space-limited installations where moisture and corrosion resistance matter. With JL Audio’s efficient NexD™ switching design, it delivers clean power without overloading smaller charging systems.

Rated RMS power @ 14.4V (<1% THD+N): 50W x 4 @ 4Ω, 70W x 4 @ 2Ω, 140W x 2 bridged @ 4Ω
Rated RMS power @ 12.5V (<1% THD+N): 36W x 4 @ 4Ω, 52W x 4 @ 2Ω, 100W x 2 bridged @ 4Ω
Frequency response: 20 Hz – 20 kHz (+0, -1 dB)
Crossovers: Independent front/rear selectable HPF or LPF (defeatable), 35–300 Hz, 12 dB/oct
Input sensitivity (dual-range): 250 mV–4 V (Low) or 750 mV–15 V (High)
Minimum impedance: 2Ω per channel (unbridged) / 4Ω bridged
Marine-ready construction: IPX6 water-resistant design, corrosion-resistant cast-aluminum chassis, stainless hardware & gasketed control cover
Electrical: 35A fused, 8 AWG power/ground wire recommended
Dimensions (H×W×D): 1.77" × 8.66" × 3.09" (45 × 220 × 78.5 mm)

OEM references: MHX280/4 (JL Audio MFR #98403).
Supplier SKU: JLMHX280/4.

Before ordering, confirm ratings, specifications and fitment for your speakers/subwoofers and installation environment to avoid mismatches or equipment damage.

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All orders ship from the UK. Orders placed Monday–Thursday before 12:00pm are processed same day. Orders placed Friday after 12:00pm through Sunday are processed the following Monday. Processing times vary by stock location.

Out of stock items can be back-ordered with a typical 3–4 week lead time.

If an item shows "Dispatch Available Today" and you order after 2pm UK time, processing begins the next business day.

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