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Black rectangular car amplifier with silver trim and Kenwood eXcelon branding

KENWOOD

Kenwood XR401-4 eXcelon 400-Watt 4-Channel Car Amplifier

SKU CH-2TV2-659AM

Delivers 75 watts RMS per channel to four speakers or 200 watts bridged to two subwoofers with Class D efficiency and 20-40,000 Hz response

  • Amplifier classClass D
  • Amplifier channels4 Channels
  • RMS power rating400 W
  • Key features4-channel amplifier
  • Product typeAmplifiers
  • 75 watts RMS per channel drives front and rear speakers with clarity
  • 200 watts RMS bridged powers a pair of subwoofers when bass comes first
  • Class D design delivers 400 watts total power efficiently
  • Frequency response to 40,000 Hz reproduces detail beyond standard CD range
  • Variable 12 dB/octave filters let you tune crossovers from 50 Hz to 10 kHz

4-Channel Class D Amplifier

The Kenwood Excelon XR401-4 is a Class D 4-channel car amplifier rated at 400 watts RMS total. It delivers 75 watts RMS per channel into 4 ohms or 100 watts RMS into 2 ohms, powering front and rear speakers with clarity. Bridged operation provides 200 watts RMS per channel into 4 ohms for dual subwoofer use. The design suits owners seeking flexible system growth from a single chassis.

Variable Filters and High-Resolution Response

Variable low-pass and high-pass filters cover 50-200 Hz and 2.5k-10k Hz at 12 dB/octave, letting you tailor crossover points for speakers or subwoofers. Frequency response extends to 40,000 Hz, capturing ultrasonic detail from high-resolution FLAC or DSD files when paired with capable speakers. Preamp-level inputs require a source unit with RCA outputs; speaker-level signals are not accepted directly.

CTA-2006 Compliance and Power Requirements

CTA-2006 compliance confirms the published power ratings follow a consistent measurement standard. The amplifier draws power through two 30A fuses and requires 4-gauge power and ground wiring for safe current delivery. Buyers whose vehicles lack adequate alternator reserve or who cannot run heavy-gauge cable will find the installation impractical. No speaker-level inputs or built-in DSP are provided.

How it compares

Measured against everything we stock in Car Audio Amplifiers, at today’s prices. Recalculated every night.

Price $325.99
Pricier than about 64% of the 158 comparable items (median $225.49).

Specifications

Product
Brand nameKenwood
Product typeAmplifiers
Audio & video
Amplifier channels4 Channels
RMS power rating400 W
More details
Amplifier classClass D

Questions about this item

How often should the dual 30 A fuses be checked or replaced on the XR401-4?

The amplifier uses two 30 A fuses; inspect them during routine vehicle maintenance and replace only if a fuse blows, indicating a wiring or load fault.

Which protection circuit activates first when the Class D amp runs at full output for long periods?

Thermal protection engages first under sustained high output, muting the amp until the heatsink temperature drops to a safe level.

How much heat does the 400 W Class D design produce when driving four speakers all day?

Class D topology keeps efficiency high, so the chassis stays warm but not hot during continuous 75 W × 4 operation, and the fanless design runs silently.

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