The Kicker KMA600.4 (OEM 48KMA6004) is a genuine KM-Series, REAL MARINE™ 4-channel Class-D amplifier built to deliver strong, efficient power in harsh saltwater and UV environments. It’s ideal for powering up to four speakers (or up to eight when wiring multiple speakers per channel within safe impedance limits), or for bridging into two higher-power channels for tower or zone setups.

• OEM / MFR: Kicker 48KMA6004 (KMA600.4) | SKU: KA48KMA6004
• RMS power @ 14.4V: 75W x 4 @ 4Ω (stereo) | 150W x 4 @ 2Ω (stereo) | 300W x 2 @ 4Ω (bridged)
• Dynamic power: 725W
• Frequency response: 10Hz–20kHz (+0/-1dB)
• Active crossover: 12dB/oct, variable 50–200Hz (HP / LP / OFF)
• Bass boost: KickEQ™ 0–6dB @ 40Hz
• Inputs: High-level (250mV–10V) and low-level RCA (125mV–5V); compatible with Kicker KISL speaker-to-RCA adapters when using speaker-level outputs
• Marine-ready build: conformal-coated PCB, stainless-steel hardware, and ABYC/NMMA-compliant power connections (REAL MARINE™)
• Installation notes (per manual): 2Ω stable in stereo, 4Ω minimum when bridged; use an 80A external fuse and 4 AWG power/ground wiring, with the fuse installed within 7 in (18 cm) of the battery

Before ordering: confirm your speaker wiring, impedance, available mounting space, and power wiring/fusing meet the amplifier requirements to avoid damage and ensure safe operation.