KICKER 48KMA3604 KMA360.4 — 4x90W Weather-Resistant 4-Channel Full-Range Amplifier

Meet the KICKER 48KMA3604 KMA360.4, a weather-resistant four-channel amplifier designed to power your vehicle's full-range speakers with clarity and control. Its compact footprint is engineered to fit behind panels, under seats, or in tight trunks, so you can upgrade sound without sacrificing valuable space. By combining rugged construction with smart signal management, this amp aims to deliver a more engaging listening experience across a range of musical styles.

Weather-ready design built for real life

The conformal-coated circuit boards help repel moisture and resist contaminants, keeping critical electronics safer in humidity, road spray, and temperature swings. Corrosion-resistant parts, including 316L stainless-steel hardware, are chosen for durability in demanding driving conditions and long-term reliability. This approach aligns well with marine or off-road environments that face dust, rain, and humidity.

• Conformal-coated circuit boards repel moisture for consistent performance
• 316L stainless-steel hardware resists rust and corrosion for longevity

Smart tuning and flexible speaker matching

Built-in variable crossovers offer direct control over how the amp feeds your speakers. This allows you to tailor the tonal balance—shaping treble, mids, and bass—to complement your existing components and cabin acoustics, without needing extra gear. The design supports a wide range of configurations, from four full-range channels to combinations with a separate subwoofer stage.

• Built-in variable crossovers support precise speaker performance matching
• Full-range output preserves the integrity of your system's tone

Compact footprint, big installation potential

With a small form factor, the unit can tuck into tight spaces behind panels or under seats, freeing up trunk or cargo area while still delivering robust power. This design makes it easier to plan a clean, organized install for complex audio setups and minimizes heat buildup in cramped compartments.

What you might notice in the car, in real life

Expect clearer highs, more controlled bass, and a broader dynamic range as you drive. The combination of power and compact design means you can upgrade performance without a bulky component rack, avoiding clutter while pursuing a richer soundstage. In practice, better heat management and clean crossovers can reduce distortion at higher volumes.

• Clear highs and controlled bass across channels
• Solid performance in mixed driving conditions

Note: This description focuses on described features and plausible, non-guaranteed benefits. Actual results depend on your vehicle, installation, and speaker system. Use this information to help compare products and plan your upgrade.