Big bass from a tiny amp

Subwoofer aficionados will tell you that lots of power is key to great-sounding bass, but sometimes you just don't have enough space in your car for a large amplifier. Kenwood's Excelon X503-1 mono sub amp provides up to 500 watts RMS to your subwoofer and will fit almost anywhere in your vehicle. Kenwood uses audiophile-grade tech, including shielded output circuitry, high-quality capacitors, and Class D technology to ensure the amp will sound great and run cool.

Dialing it in

A precise low-pass filter lets you optimize the sound for your sub, while the built-in bass boost lets you dial in just the right amount of thump. A subsonic filter removes ultra-low bass so that your amp and sub can operate more efficiently. A wired remote lets you control your sub's level from the front seat.

Integrates well

The amp accepts input signals via RCA cables from an aftermarket receiver or by way of a factory radio's speaker wiring so it'll work with almost any non-premium mobile audio system. If you do use the speaker-level inputs, the amp can sense the signal and turn itself on, so you won't need to install a separate remote turn-on lead running from the receiver or fuse box.

X503-1 controls
Rich and Immersive High-Resolution Audio

High-Resolution Audio is high-quality sound that exceeds CD standard. High-resolution audio captures and beautifully expresses all the details of your favorite music. Through ultra-high and low frequencies, immerse yourself in a rich and high-quality sonic experience.
HIGH PERFORMANCE PARTS

Special capacitors and inductors have been carefully selected for the digital amplifier’s LC filter, which is essential for achieving highresolution audio. These high-performance parts reduce noise and distortion and ensure excellent sound quality.
DEEP BASS SOUND

By using a down-firing subwoofer and superior technologies, the audio system generates high-quality sound and powerful bass, while still being compact.
ENHANCED SIGNAL TO NOISE RATIO

The feedback value of the current XR Amplifier has been optimized to improve the S/N ratio. As a result, the noise level has been reduced by up to 40%.
SPECIALIZED CIRCUIT DESIGN

The noise reduction system employs a special layout that separates the analog circuit, digital amplifier circuit and power supply circuit. This keeps interference between the circuits to a minimum, decreasing noise and thereby achieving high performance and sound quality.
Product highlights:

mono subwoofer amplifier

300 watts RMS x 1 at 4 ohms

500 watts RMS x 1 at 2 ohms

CTA-2006 compliant

Class-D amplifier design

frequency response: 20-200 Hz

variable low-pass filter: 50-200 Hz, 24 dB/octave

variable bass boost: 0-18 dB at 40 Hz

selectable subsonic filter: 25 Hz, 24 dB/octave

More info:

wired remote level control included

preamp and speaker-level inputs

speaker wire adapters included

speaker-level inputs can handle up to 12V (36W)

signal-sensing turn-on with speaker-level input

wiring and hardware not included with amplifier

8-gauge power and ground leads recommended

fuse rating: 30A x 2

dimensions: 8.4"W x 2.09"H x 5.95"D

warranty: 2 years

MFR # X503-1

Item # 113X5031
What's in the box:

Mono subwoofer amplifier (two installed 30A mini-ATC fuses)

7" Speaker-level input harness

Remote level control

19.5' Remote level control cable (RJ-14 connectors on both ends)

Hex nut

Flat washer

Four 1/2" screws

Two Allen keys (4mm & 2.5mm)

Instruction manual (En/ Sp/ Fr)

Warranty information

KENWOOD

Kenwood eXcelon X503-1