Kicker KPX300.4 Compact 4-Channel Powersports Amplifier (51KPX3004)

Stock bagger and UTV audio disappears at highway speed, and there's rarely room for a full-size amp. The KPX300.4 is Kicker's answer. It's a weather-resistant four-channel amplifier only 3-5/16" wide and 8-1/2" long, so it fits under motorcycle fairings and in tight side-by-side dash cavities.

It delivers 75 watts x 4 at 2 ohms or 45 watts x 4 at 4 ohms, and it bridges to 150 watts x 2. That's enough to run fairing and saddlebag or Tour-Pak speakers together without taxing your charging system. Selectable high-pass crossovers (60/80/100/120 Hz) and independent gains protect small speakers and help keep vocals clear through a helmet. A wide input range lets it connect to factory or aftermarket radios.

Best for: Harley touring bikes, Can-Am and Polaris side-by-sides, golf carts and any space-compromised install.

Pairs with: Kicker Harley speaker kits, PSM handlebar speakers and KMXL powersports speakers.

Key Specs

• Power: 75W x 4 @ 2Ω; 45W x 4 @ 4Ω; 150W x 2 bridged
• Dynamic power: 350W
• Frequency response: 20 Hz–20 kHz
• Crossover: 60/80/100/120 Hz high-pass, 12dB/oct
• Dimensions: 3-5/16" W x 1-11/16" H x 8-1/2" L
• Weather-resistant; 2-year Kicker warranty (per listing)

FAQ

Will the KPX300.4 fit under my Harley fairing?

It is built for fairing installs at 3-5/16" x 1-11/16" x 8-1/2". Check your specific bike for mounting space.

Can it run four speakers?

Yes. It runs four speakers at 75W each into 2 ohms, or two bridged at 150W.

Will it drain my battery?

KPX amps are designed for low draw on powersports charging systems. As with any amp, wire it to switched power.

Why Buy from Ocean Rock Audio

Ocean Rock Audio is an authorized Kicker dealer and South Florida's Kicker marine and powersports audio specialist, so your purchase carries the full Kicker manufacturer warranty. Ask us about fitment before you order.