4-Channel Marine Amplifier Kicker Genuine, KMA300.4 300W Class D, OEM 45KMA3004 (SKU KA45KMA3004)

The Kicker KMA300.4 is a compact, marine-ready 4-channel Class D amplifier built to deliver clean, reliable power in harsh onboard environments. This is a genuine Kicker Marine Audio unit referenced as OEM 45KMA3004 (TMP SKU KA45KMA3004).

• Power (RMS @ 14.4V, ≤1% THD+N): 40W x 4 @ 4Ω, 75W x 4 @ 2Ω, 150W x 2 bridged @ 4Ω
• Amplifier type: 4-channel, Class D with bridging capability
• Marine protection: Conformal-coated PCB, ABYC/NMMA-compliant power connections, included stainless hardware
• Frequency response: 10Hz–20kHz (±1dB)
• Signal-to-noise ratio: >95dB (A-weighted, re: rated power)
• Inputs: RCA inputs accept low-level (125mV–5V) or high-level (250mV–10V) signals (high-level via appropriate adapters such as Kicker KISL)
• Crossovers: 12dB/octave, variable 50–200Hz, selectable High-Pass / Low-Pass / All-Pass
• Bass boost: KickEQ™ variable 0–12dB centered at 40Hz
• Minimum impedance: 2Ω stereo; 4Ω when bridged
• Dimensions (L x W x H): 12-7/16" x 7-1/8" x 2-5/16" (31.5 x 18.0 x 5.9 cm)
• Recommended installation items: external 60A fuse and 4-gauge wiring kit (sold separately)

Typical use: Power multiple marine speakers with stable 2Ω capability per channel, or bridge channels to drive higher-power loads where appropriate.

Before ordering: Confirm ratings, specification, wiring, and fitment for your exact system. Incorrect impedance or gain settings can cause distortion, overheating, or component damage.