Kenwood Excelon X303-4
4-channel car amplifier — 50 watts RMS x 4
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Kenwood Excelon X303-4 4-Channel Class-D Amplifier
The Kenwood Excelon X303-4 is a high-efficiency 4-channel Class-D amplifier delivering up to 600W max output. Designed for tight, clean amplification of full-range and subwoofer channels, it features compact form factor, shielded output coil, and high-quality components to minimize distortion and noise.
| Key Features | |
|---|---|
| Class | Class-D high-efficiency design |
| Power Output | 600W max total output |
| Shielded Output Coil | Reduces electromagnetic interference & noise |
| High-Quality Components | PMLCAP capacitors in LC filters for low distortion |
| Compact Design | Slim chassis ideal for tight mounting spaces |
| Terminals | Gauge-style screw terminals for secure wiring |
| Bridgeability | Can be bridged for higher power output modes |
| What’s in the Box |
|---|
| 1x Kenwood Excelon X303-4 amplifier |
| 4x Mounting screws |
| 1x Allen wrench (for terminal screws) |
| 1x Owner’s manual & installation guide |
| 1x Warranty card |
| Technical Specifications | |
|---|---|
| Continuous Power | Not specified (see user manual) |
| Max Power | 600W total |
| Signal-to-Noise Ratio | > 100 dB |
| Frequency Response | 10 Hz – 150 kHz |
| Total Harmonic Distortion | < 0.05% |
| Input Sensitivity | 200mV – 4V |
| Impedance | 4–8 Ω (per channel), 2–4 Ω (bridged) |
| Dimensions (W × H × D) | ≈ 5-3/4" × 2-1/8" × 11" (146 × 54 × 280 mm) |
| Mounting Hole Pitch | ≈ 256 mm × 120 mm |
| Cooling | Aluminum heat sink with natural convection |
| Warranty | 2 Years (parts & labor) |
FAQ
Do products purchased from San Diego Car Stereo come with a warranty?
Yes, all products come with a 1-year manufacturer warranty unless otherwise stated. This covers any defects excluding physical damage.
Are these products brand new?
Yes, every product we sell is 100% brand new, unused, and comes in original manufacturer packaging unless clearly marked otherwise.
Do you offer installation services?
Yes, we offer professional installation services at both of our San Diego Car Stereo locations. Our expert technicians have over 50 years of combined experience to install all of your car, marine, or offroad audio needs. Stop by or give us a call to schedule an appointment to get a quote in person.