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JL Audio  JD250/1

JD Series 250W RMS x 1 at 2 Ohms, Class-D Mono Subwoofer Car Amplifier

Item #55820

Condition:   Brand New

Product Highlights

  • 250W RMS power
  • 2 Ohms impedance
  • Class-D amplifier
  • Mono subwoofer
  • Car audio use

  Free 2-Years Warranty Included!
60 DAYS Returns Accepted.
FREE Lifetime Tech Support.
FREE Shipping.
60 DAYS Price change protection.

$239.99

Reg. Price $329.99  Save $90.00
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  Free 2-Years Warranty Included!
60 DAYS Returns Accepted.
FREE Lifetime Tech Support.
FREE Shipping.
60 DAYS Price change protection.

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JL Audio JD250/1 JD Series 250W RMS x 1 at 2 Ohms, Class-D Mono Subwoofer Car Amplifier


We are a JL Audio authorized dealer so you get up-to-date, fully warrantied products. Shipping is free to the lower 48 states on everything you order!

What's Inside?
  • • JD Series Class-D Monoblock Subwoofer Amplifier
  • • 2.5 mm Allen-wrench
  • • 3 mm Allen-wrench
  • Owner's Manual

 


Why Choose JL Audio JD250/1 Mono Subwoofer Amplifier?


 

 

JL Audio JD250/1 Mono Subwoofer Amplifier Direct Top Down View
JL Audio's JD Series Amplifier

The youngest brother in JD Series amplifiers, the JL Audio JD250/1 can still maximize your subwoofer's potential thanks to its Class-D amp design technology. This mono subwoofer amplifier is equipped with JL Audio's own patented technologies and has a compact chassis, so not only do you get a high-quality bass output from it, but you won't also have a hard time installing it in your vehicle.

NexD Switching Technology

The amplifier is equipped with the famous NexD Switching technology, which uses a self-oscillating modulator to help remove the noise that comes from fluctuations in power supply voltage. JL Audio’s JD250/1 is also loaded with differential-balanced inputs, which also cancels out the noise that comes from the usual car audio system wiring setup.

JL Audio JD250/1 Mono Subwoofer Amplifier Top Off Circuit Board Interior View
JL Audio JD250/1 Mono Subwoofer Amplifier Three Quarter Side Angle Highlighting Level Controls
Deep Bass and Minimal Distortion

The JL Audio JD250/1 can deliver a power output of 150 Watts at 4 ohms and 250 Watts at 2 ohms. With a frequency response of 7 up to 500 Hz, you get not only a loud bass output but also a deep and extensive low-frequency performance with minimal distortion.

Customizable Low-Pass Filter

This mono amplifier also has a variable low-pass filter that can be set from 50 up to 500 Hz and a bass boost control of up to 12 dB at 45 Hz. With JL Audio JD250/1’s features, you can get the more defined bass quality that you deserve.

JL Audio JD250/1 Mono Subwoofer Amplifier Three Quarter Side Angle Highlighting Output Blocks

Frequently Asked Questions (FAQ)


  • • Why does my JL Audio JD250/1 turn on but my subwoofer doesn't play?
    Check the speaker wiring, RCA connections, and verify that the low-pass filter and gain are set correctly.
  • • Can I run a 2-ohm subwoofer on the JD250/1?
    Yes. The JD250/1 is designed to deliver its rated power into a 2-ohm load.
  • • Why is the Protect LED illuminated on my amplifier?
    This usually indicates a shorted speaker wire, incorrect impedance, or overheating. Inspect the wiring before powering it on again.
  • • Can I connect the JD250/1 to a factory stereo without RCA outputs?
    Yes. The amplifier accepts high-level speaker inputs when installed using the appropriate wiring.
  • • Why does my bass disappear after driving for a while?
    The amplifier may be entering thermal protection due to poor ventilation or an overloaded speaker connection.
  • • Do I need the optional HD-RLC remote bass knob?
    No, but it provides convenient bass level adjustment from the driver's seat without changing amplifier settings.
  • • Why do I hear engine whine through my subwoofer?
    Poor grounding or improperly routed signal cables are the most common causes of alternator noise.
  • • Can I bridge another amplifier with the JD250/1?
    No. The JD250/1 is already a dedicated monoblock amplifier and cannot be bridged with another amp.
  • • Why does my amplifier blow the fuse immediately after installation?
    This is usually caused by reversed power wiring or a direct short in the power cable. Disconnect power and inspect all connections.
  • • Can I upgrade to a larger subwoofer without replacing the JD250/1?
    Yes, as long as the new subwoofer's RMS power and impedance are compatible with the amplifier's output.

SPECIFICATIONS


  • Number of Channels : 1
  • Frequency Response : 7-500 Hz
  • Amplifier Class : D
  • Fuse Rating : 30 A
  • Promo : Yes

FEATURES


Features:

  • Power Output: 250 W x 1 @ 2 Ω / 150 W x 1 @ 4 Ω (14.4V, 1% THD)
  • NexD™ Switching Technology: Provides high power output with excellent efficiency and ultra-low distortion
  • Chassis Design: Extruded aluminum chassis with controls on the input panel and power/speaker connections on the opposite end
  • Low-Pass Filter: 12 dB / octave with continuously variable frequency selection from 50-500 Hz
  • Bass Boost EQ: Variable for enhanced low-end performance
  • Input Options: Dual-range, differential-balanced inputs for both line-level and speaker-level signals
  • Automatic Turn-On: Activated by signal sensing or DC-offset sensing
  • Preamp Outputs: Allows for easy signal passing to additional amplifiers
  • LED Clipping Indicator: Input sensitivity control with an onboard LED-clipping ring for quick and accurate setup
  • Optional Remote Level Control: Compatible with the RBC-1 for subwoofer level adjustments from the driver’s seat (sold separately)

 

Specifications:

Rated Continuous (RMS) Power @ 14.4 V

  • @ 4 Ω: 150 W RMS x 1
  • @ 3 Ω: 200 W RMS x 1
  • @ 2 Ω: 250 W RMS x 1
  • @ 1.5 Ω: N/A

 

Rated Continuous (RMS) Power @ 12.5 V

  • @ 4 ohms: 115 W RMS x 1
  • @ 3 ohms: 150 W RMS x 1
  • @ 2 ohms: 200 W RMS x 1
  • @ 1.5 ohms: N/A

 

General Specifications

  • Frequency Response: 7 Hz - 500 Hz (+0, -1dB)
  • S/N Ratio, referred to highest rated power >80 dB below rated power (A-weighted, 20 Hz - 20 kHz noise bandwidth)
  • S/N Ratio, referred to 1 W >60 dB (A-weighted, 20 Hz - 20 kHz noise bandwidth)
  • Damping Factor @ 4 ohms: >1000 / 50 Hz
  • Damping Factor @ 2 ohms: >500 / 50 Hz
  • THD+N @ Rated Power: <1% @ 2 Ω per Ch.
  • Input Voltage Range @ RCA Inputs: Switchable from 200 mV - 2 V RMS (Low) to 800 mV - 8 V RMS (High)
  • Min.Copper Power / Ground Wire Gauge: 8 AWG wire
  • Fuse Rating: 30 A (AFS, AGU or MaxiFuse™)

 

Signal Processing

  • Filter Mode(s): Low-Pass only
  • Filter Slope(s): 12 dB/octave
  • Filter Frequency Range: 50 Hz - 500 Hz
  • Detented, Calibrated Filter Freq. Potentiometer: No
  • Filter Defeat Function: No
  • Infrasonic Filter: No
  • Bass Boost EQ: Yes
  • Output Polarity Switch: No
  • Remote Subwoofer Level Control: Optional (RBC-1)
  • Remote Bass EQ Boost Control: No
  • Pass-Through Preamp Output: Buffered

 

Physical Specifications

  • Height (H): 2.10 in / 53 mm
  • Width (W): 9.50 in / 242 mm
  • Depth (D): 7.50 in / 190 mm
  • UPC: 699440983600
  • Weight: 7
  • Authorized Internet Dealer
Warranty: 2 Year(s) Warranty.
This item is accompanied by a manufacturer's warranty. If it is found to be defective, it may be returned to OnlineCarstereo.com for repair within 1 year from the original date of purchase with proper return authorization.

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Write a review!
  • Oh! This amplifier really pushes my subwoofer to their maximum performance compared to my last amp. No wonder why many loves this specific amplifier.

    Erik Wright
    4/24/2023

  • Awesome power! I've barely turned up the gain, and my subwoofer already hits harder than what I've expected from it. Delivers great power and sounds super clean.

    Harry
    6/3/2024

  • Rock-solid performance for over a year! This amp is the perfect match for my Fosgate sub. Delivers powerful, clean bass every time!

    Dwight
    3/31/2025

  • not that expensive compared to other JL Audio amplifiers but it still got that sound that I'm looking for my bass. no compromise

    alex
    4/21/2025
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