Kenwood X303-4 eXcelon 4-Channel Amplifier 600W Class-D Car Audio Amp

X303-4

Product Description:

The Kenwood X303-4 is a compact 4-channel amp that’s perfect for upgrading your door speakers without overcomplicating the build. Clean power, small footprint, and part of the eXcelon lineup—so it’s built to sound better and install easier.

This is a go-to for clean daily systems where you want more volume and clarity than a head unit can deliver, but don’t need anything crazy.

What it does:

• 4-channel amp for door speakers or small full-range systems
• Compact size for tight installs
• Clean power upgrade over factory or radio power

Specifications:

• Power Output (RMS):
  • 50W x 4 @ 4Ω
  • 75W x 4 @ 2Ω
  • 150W x 2 bridged @ 4Ω
• Max Power:
  • 600 Watts
• Amplifier Class:
  • Class-D (efficient, compact design)
• Frequency Response:
  • 20Hz – 50kHz
• Signal-to-Noise Ratio:
  • ~90 dB
• Crossovers:
  • High-pass: 50Hz – 200Hz
  • Low-pass: 50Hz – 200Hz
  • 12 dB/octave slope
• Bass Boost:
  • 0 – +18dB @ 40Hz (B channels)
• Inputs:
  • RCA low-level inputs
  • High-level (speaker level) inputs
  • Signal sensing turn-on

• Build / Features:

  • Hi-Res Audio certified
  • One-side connections for clean installs
  • Compact chassis design
• Dimensions:
  • 8.38" W x 2.06" H x 5.88" D
• Electrical:
  • Operating Voltage: 11V – 16V
  • Current Consumption: ~19A