Kenwood Excelon X503-1
Mono subwoofer amplifier — 500 watts RMS at 2 ohms
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Kenwood Excelon X503-1 Class D Mono Subwoofer Amplifier
The Kenwood Excelon X503-1 is a compact, high-performance mono Class D amplifier that delivers up to 500W RMS at 2Ω. It features a variable low-pass filter, infrasonic filter, bass boost, and a wired remote level control—engineered to provide clean, powerful bass in tight installation spaces.
| Key Features | |
|---|---|
| RMS Power @ 4Ω | 300W |
| RMS Power @ 2Ω | 500W |
| Max Power | 1,000W |
| Low-Pass Filter | 50–200 Hz, 24 dB/octave |
| Infrasonic Filter | 25 Hz, 24 dB/octave |
| Bass Boost | 0–18 dB @ 40 Hz |
| Install-Friendly | All connections on one side; compact chassis |
| Build | Shielded output coil, premium components for low distortion |
| What’s in the Box |
|---|
| 1x X503-1 mono amplifier (2 × 30A fuses pre-installed) |
| 1x 7" speaker-level input harness |
| 1x Wired remote level control |
| 1x 19.5' remote level control cable (RJ-14) |
| 1x Hex nut |
| 1x Flat washer |
| 4x 1/2" mounting screws |
| 2x Allen keys (4 mm & 2.5 mm) |
| 1x Instruction manual & warranty information |
| Technical Specifications | |
|---|---|
| Frequency Response | 20 Hz – 200 Hz |
| Signal-to-Noise Ratio | 100 dB (ref. rated power into 4Ω) |
| Input Sensitivity (RCA) | 0.2V – 5.0V |
| Speaker-Level Input Sensitivity | 4.0V – 12.0V |
| Fuse Rating | 2 × 30A mini-ATC |
| Dimensions (W × H × D) | 8-3/8" × 2-1/16" × 5-7/8" (≈213 × 53 × 149 mm) |
| Operating Voltage | 11–16V DC (14.4V nominal) |
| Current Draw | 28A (approx.) |
| Warranty | 2 Years (parts & labor) |
FAQ
Do products purchased from San Diego Car Stereo come with a warranty?
Yes, all products come with a 1-year manufacturer warranty unless otherwise stated. This covers any defects excluding physical damage.
Are these products brand new?
Yes, every product we sell is 100% brand new, unused, and comes in original manufacturer packaging unless clearly marked otherwise.
Do you offer installation services?
Yes, we offer professional installation services at both of our San Diego Car Stereo locations. Our expert technicians have over 50 years of combined experience to install all of your car, marine, or offroad audio needs. Stop by or give us a call to schedule an appointment to get a quote in person.