Kenwood eXcelon X303-4 600-Watt 4-Channel Class D Car Amplifier

The Kenwood eXcelon X303-4 is a compact 4-channel Class D amplifier built for buyers who want clean full-range power without giving up installation flexibility. Its smaller chassis makes it easier to fit in tighter vehicle spaces while still delivering the output needed for front and rear speakers or a bridged speaker setup.

This amplifier is rated at 50 watts RMS x 4 at 4 ohms, 75 watts RMS x 4 at 2 ohms, and 150 watts RMS x 2 bridged at 4 ohms, with a 600-watt max power rating. Kenwood also equips it with variable high-pass and low-pass filters, bass boost on B channel, speaker-level inputs, and a one-side connection layout for cleaner installation access.

Key Features

• 600-watt 4-channel Class D amplifier
• 50 watts RMS x 4 at 4 ohms
• 75 watts RMS x 4 at 2 ohms
• 150 watts RMS x 2 bridged at 4 ohms
• Compact eXcelon chassis
• Variable high-pass and low-pass filters
• Bass boost on B channel
• Speaker-level inputs
• One-side connection design
• High-Resolution Audio certified
• 2-year warranty

Connectivity & Integration

• Amplifier type: 4-channel Class D full-range amplifier
• Speaker-level input: Yes, for easier integration with compatible factory or aftermarket source units
• Application: Designed for powering front and rear speakers, or bridged channels in aftermarket car audio systems
• Install layout: One-side connection design for cleaner wiring and easier installation access
• Audio certification: High-Resolution Audio certified

Power & System Control

• 50W x 4 RMS at 4 ohms
• 75W x 4 RMS at 2 ohms
• 150W x 2 bridged at 4 ohms
• 600W max power rating
• Variable high-pass and low-pass filters for flexible system tuning
• Bass boost on B channel for added low-frequency emphasis when desired
• Compact design works well in builds where space is limited but clean multi-channel power still matters

Installation & Fitment Notes

• Amplifier type: 4-channel full-range amplifier
• Chassis size: Compact footprint for easier mounting in tighter spaces
• Dimensions: 8-3/8" W x 2-1/16" H x 5-7/8" D
• Proper power wire, ground, fuse protection, and speaker load configuration should be confirmed before installation
• This amplifier can run four channels of speakers or two bridged channels, depending on system design

Technical Specifications

• Model: X303-4
• Amplifier class: Class D
• Channels: 4
• RMS power at 4 ohms: 50W x 4
• RMS power at 2 ohms: 75W x 4
• Bridged power at 4 ohms: 150W x 2
• Maximum power: 600W
• High-pass filter: Variable
• Low-pass filter: Variable
• Bass boost: Yes, B channel
• Speaker-level inputs: Yes
• Dimensions: 8-3/8" x 2-1/16" x 5-7/8"

Identifiers & Packaging

• Manufacturer Part Number (MPN): X303-4
• UPC: 019048240217
• Sold As: Each
• Included Components: X303-4 amplifier, speaker-level input harness, installation hardware, and manufacturer-supplied documentation

Why Buy From MCOR Automotive

• Authorized Kenwood retailer
• Experienced with amplifier matching, speaker power planning, and clean installation layouts
• Support for choosing the right wiring, speaker load, and integration parts for a reliable setup