We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Compact silver car amplifier with finned heatsink and terminal strips

KENWOOD

Kenwood X303-4 4-Channel Class D Car Amplifier 75W RMS

SKU CH-RW5V-5FM7H

A compact four-channel Class D amplifier delivering 75 watts RMS per channel at two ohms and certified for high-resolution audio

  • TypeAmplifier
  • FeaturesDelivers 600W max power, with 50W x4 (4Ω) and 75W x4 (2Ω) RM
  • 75W RMS per channel at 2Ω drives speakers with clean power
  • 600W maximum output handles demanding musical peaks
  • High-resolution audio certification ensures detailed sound reproduction
  • Variable high-pass and low-pass filters tailor frequency response
  • Compact Class D design fits tight installation spaces

Compact 4-channel Class D amplifier

The Kenwood X303-4 is a new 4-channel Class D car amplifier built for drivers who want clean, powerful sound from a small footprint. It delivers 50W RMS per channel at 4Ω and 75W RMS per channel at 2Ω, with a maximum output of 600W. High-resolution audio certification ensures detailed playback across the frequency range.

Upgrade from factory or entry-level power

This amplifier replaces a head-unit’s built-in amplifier or a basic multi-channel amp that cannot drive aftermarket speakers to their potential. The jump is worth it when you need 50W or 75W RMS per channel for component sets or coaxial speakers and want variable high-pass and low-pass filters plus bass boost for precise tuning. Speaker-level inputs and signal-sensing turn-on simplify integration without a dedicated line-output converter.

Ideal for multi-speaker front-and-rear systems

It suits owners building a front-and-rear system who value compact dimensions and high-resolution clarity. Buyers who want more than four channels or require higher per-channel power for subwoofers should look at a different amplifier class.

Highlights

  • 75W RMS per channel at 2Ω drives speakers with clean power
  • 600W maximum output handles demanding musical peaks
  • High-resolution audio certification ensures detailed sound reproduction
  • Variable high-pass and low-pass filters tailor frequency response
  • Compact Class D design fits tight installation spaces

Specifications

BrandKenwood eXcelon
TypeAmplifier
FeaturesDelivers 600W max power, with 50W x4 (4Ω) and 75W x4 (2Ω) RMS output

Questions about this item

What are the exact dimensions I need to clear for the 8-3/8" wide by 5-7/8" deep chassis?

The amplifier measures 8-3/8 inches wide, 2-1/16 inches high, and 5-7/8 inches deep; allow extra space around the heatsink fins and for the side-mounted power and speaker terminals.

Which wiring step do installers most often skip on the speaker-level inputs?

Many forget to enable the signal-sensing turn-on after tapping the factory speaker wires, so the amp stays off until the head unit sends audio.

When should I re-check the variable high-pass and low-pass filter dials?

Verify the filter settings after the first week of driving and again whenever you change speakers or add a subwoofer to keep crossover points aligned.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.