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Kenwood eXcelon XR-4S Open Box

Reference Fit Class D 4-Channel Amplifier

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Reference Fit Class D Monoblock Car Amplifier • 120 Watts RMS X 4 Chan. @ 4 Ohm • 150 Watts RMS X 4 Chan. @ 2 Ohm • 300 Watts x 4 Chan Max • Heavy Duty Heatsink With Cooling Fan • Digital Amplifier • Dual Power Supply

Learn more about the LS-xr4s-OB

We apologize

This item has been discontinued

Product Highlights


Reference Fit Class D Monoblock Car Amplifier • 120 Watts RMS X 4 Chan. @ 4 Ohm • 150 Watts RMS X 4 Chan. @ 2 Ohm • 300 Watts x 4 Chan Max • Heavy Duty Heatsink With Cooling Fan • Digital Amplifier • Dual Power Supply

Description


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Item Condition - Open Box, Great:

This product works like new, is well-cared-for and in great condition. May show limited signs of wear or use and may be missing non-essential parts, accessories or original packaging.

The eXcelon Reference Fit amplifiers may fool some, but those who know Kenwood understand the power behind the aluminum plating. These amplifiers have a small footprint allowing installation in even the tightest of locations. For those who need a truly custom installation the top plate can be removed and replaced with a creation of your choice. For such a small size these amplifiers put out a huge amount of power, just don't let it go to waste

  • Reference Fit Class D Car Amplifier
  • RMS Power Rating:
    • 4 ohm: 120 watts x 4 chan.
    • 2 ohm: 150 watts x 4 chan.
    • Bridged, 4 ohm: 300 watts x 2 chan.
  • Max power output: 300 watts x 4 chan.
  • Digital amplifier technology with dual MOSFET switching power supply
  • Remote bass level input (Kenwood KAC-X1D remote level control sold separately)
  • LED power indicators
  • 4/3/2 Channel operation
  • Line inputs
  • AB/A Channel input selector with independent gain adjustment
  • Single side exposure of terminals for multi-installation
  • 3-Way System Protection circuitry (thermal, overload, and speaker short protection)
  • Heavy duty aluminum alloy heatsink with built-in cooling fan for extreme heat dissipation
  • Removable top plate allows for custom fabricators to easily create their own plates
  • Gold-plated RCA level inputs
  • Gold-plated screw terminals
  • Variable high-pass filter (Low Range: 50-200 Hz, 12 dB/octave | High Range: 2,500-10,000 Hz, 12 dB/octave)
  • Variable low-pass filter (Low Range: 50-200 Hz, 12 dB/octave | High Range: 2,500-10,000 Hz, 12 dB/octave)
  • Infrasonic Filter (24 dB at 15-40 Hz)
  • CEA-2006 compliant amplifier
  • Frequency response: 20-20,000 Hz
  • Dimensions: 9-1/4"W x 2-1/16"H x 7-9/16"D
  • 4-gauge power and ground wiring is required for installation. Contact us for information regarding a discount on select amplifier kits when purchased together with this amplifier.
  • 30-Day Sonic Electronix warranty

Specifications & Details


Power Specifications - Full Range Channels
RMS Power @ 4 ohms
120 watts x 4 channel
RMS Power @ 2 ohms
150 watts x 4 channel
Bridged RMS Power
300 watts x 2 channel
Amplifier Specifications
Amplifier Class
D
Number of Channels
4-Channel
Total Peak Power Output
1200 watts
Total RMS Power Output
600 watts
Maximum Input Gauge Size
4 AWG
Minimum Impedance Unbridged
2 ohm
Minimum Impedance Bridged
4 ohms
THD at Rated RMS Power
1%
Speaker Level Inputs
No
Preamp Outputs
No
Built-in Crossover
Low-Pass (LP)
High-Pass (HP)
High-Pass Crossover Frequency
2,500 - 10,000 Hz
Low-Pass Crossover Frequency
50 - 200 Hz
Signal-to-Noise Ratio
73 dB
Remote bass/level controller
No
Fuse Rating
30A x 2 
Warranty and Return Policy
Parts Warranty Duration
30 days
Labor Warranty Duration
30 days
Warranty Provider
Sonic Electronix

Item Details


Manufacturer:

Model Number:

XR-4S-OB

Weight:

7.50lbs

Internal SKU:

LS-xr4s-OB

Internal Product ID:

60874

Product and How-to Videos


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Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

  • You see only parts engineered for your exact vehicle
  • You avoid incompatible radios, speakers, or wiring
  • Installation is smoother, faster, and frustration-free
  • You get the correct accessories the first time

Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.