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JL Audio JX250/1
Mono subwoofer amplifier 250 watts RMS x 1 at 2 ohms
Item # 136JX2501 | MFR # 99398
This item is no longer available.
Our take on the JL Audio JX250/1 by Crutchfield's Buck Pomerantz
You know you're holding a serious piece of sound equipment when you feel the heft of a JX amp. JL Audio designed these amplifiers with sturdy, high-grade parts that ensure excellent heat management, provide high current flow, and deliver stable performance in almost any situation. You won't find blinking lights or meters on the outside of these amps, but you will find oversized output transistors and rugged MOSFET power supplies inside. The sleek, high-mass aluminum heatsink keeps things cool enough to virtually eliminate thermal shut-downs.
The JX250/1 mono amp puts out up to 250 watts RMS to your sub, so you'll experience plenty of full bass in your music. Use the variable low-pass filter and bass boost to tune the amp to your subwoofer system. An optional remote level control lets you turn the sub up or down from the front seat. The amp includes speaker-level inputs, along with preamp inputs and outputs, so it's ready to work in virtually any system.
Putting together a bass system with this amp? Check out this Crutchfield-approved amp/sub package.
Great amp. I'm using it to run a 2ohm sub. No issues what so ever. Plenty of power for my application.
Anonymous, South Carolina
What's in the Box:
- Monoblock subwoofer amplifier
- 10" Speaker-level harness
- 4 Mounting screws
- 4 Flat washers
- Owner's Manual
- mono subwoofer amplifier
- 175 watts RMS x 1 at 4 ohms (250 watts RMS x 1 at 2 ohms)
- Class AB amplifier design
- MOSFET switching power supply
- frequency response: 10 Hz - 150 Hz
- variable low-pass filter (50-200 Hz, 12 dB/octave)
- variable bass boost (0-12 dB at 45 Hz)
- optional wired remote level control
- preamp inputs and outputs
- speaker-level inputs
- 8-gauge power and ground leads and a 30-amp fuse recommended wiring and hardware not included with amplifier
- no onboard fuses when installing multiple amps in a system, an additional 30-amp in-line fuse between the distribution block and the amplifier is recommended
- 11-5/16"W x 2-1/8"H x 7-3/4"D
- warranty: 2 years
- Our 60-day money-back guarantee
JL Audio JX250/1 Reviews
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Features and Specs
|RMS Power Output (Watts x Channels)||
175 x 1
|Peak Power Output (Watts x Channels)||N/A|
|Power at 2 Ohms (Watts x Channels)||250 x 1|
|Bridged Power (Watts x Channels)||N/A|
|Minimum Impedance Bridged||N/A|
|Minimum Impedance Unbridged||2|
|Best Frequency Response||20-150 Hz|
|THD at Rated RMS Power||1%|
|Signal to Noise Ratio||87 dB|
|Low-Pass Crossover Frequency||50-200 Hz|
|Low-Pass Slope (dB/octave)||12 dB/octave|
|High-Pass Crossover Frequency||N/A|
|High-Pass Slope (dB/octave)||N/A|
|Bass Boost||0-12 dB|
|Bass Boost Frequency||45 Hz|
|Speaker Level Inputs||Harness|
|Preamp Outputs||1 pair|
|Parts Warranty||2 Years|
|Labor Warranty||2 Years|
Monoblock Class A/B Amplifier: The JL Audio JX250/1 is a class A/B monoblock subwoofer amplifier that has been optimized for low-frequency (20-150 Hz) amplification of connected subwoofers.
Note: The JX250/1 is not designed for driving full-range speakers, midrange drivers, or tweeters.
MOSFET Switching Power Supply: The JL Audio JX series monoblock amplifier employs a rugged MOSFET power supply for outstanding reliability and operational stability.
|JX250/1 Amplifier Specifications||Ohms||Watts||Channels||Frequency Response||Signal-to-Noise||THD|
|Rated Continuous (RMS) Power @ 14.4V||4||175||1||20-200 Hz||87 dB||1%|
|3||210||1||20-200 Hz||87 dB||1%|
|2||250||1||20-200 Hz||87 dB||1%|
|Rated Continuous (RMS) Power @ 12.5V||4||130||1||20-200 Hz||87 dB||1%|
|3||170||1||20-200 Hz||87 dB||1%|
|2||210||1||20-200 Hz||87 dB||1%|
High-Mass Heat Sink: A heavy extruded aluminum heat sink is designed to keep the JL Audio JX series amplifier in a comfortable thermal range during demanding operation. This high-mass, extruded heat sink removes heat from the amplifier circuitry, extending high-power operation. This improves reliability and reduces the frequency of thermally related shut-down event.
Protection Circuitry: The JX250/1's protection circuitry automatically shuts the amplifier down if thermal limits are exceeded, a short-circuit is detected in the speaker wiring, or if low supply voltage limits are reached.
Status Indicator Lights: There are two status indicator lights on the right side of the amplifier.
- Power (Green): This LED lights green to indicate that the amplifier is turned on and operating normally.
- Protect (Red): The Protection LED lights Red to indicate the amplifier's protection circuitry has been activated to prevent product failure due to thermal overload, a short-circuit, or a dangerously low impedance connected to the amplifier's outputs.
Input Sensitivity: The Input Sensitivity Control is used to match your source unit's output voltage to the input stage of the amplifier for maximum clean output.
- Low-Level Input Range: 200mV-4V (RMS)
- High-Level Input Range: 2V-10V (RMS)
Low Pass Crossover: The JL Audio JX250/1 monoblock amplifier is equipped with a 12dB/octave Butterworth low-pass filter with variable frequency selection from 50 to 200Hz.
Bass Boost: The amplifier is equipped with a variable 0 to +12dB, 45Hz Bass Boost.
Remote Level Control: The JX250/1 is equipped with a RJ-11 connection for an optional wired Remote Level Control (136RBC1, sold separately) that allows volume level adjustment of the amplifier from the front of your vehicle.
Power/Ground/Turn-On Terminals: The monoblock amplifier features set-screw terminals for the power, ground, and remote turn-on connections.
- Power and Ground: The JL Audio amplifier's set-screw Power and Ground connections are designed to accept 8 to 4 AWG power wire. A 2.5mm hex-wrench is supplied for making connections.
- Remote Turn-On: The JL Audio JX series amplifier's set-screw turn-on lead will accept 18 to 8 AWG wire. The same 2.5mm hex-wrench is supplied for making connection.
Note: The Amplifier is not equipped with a fuse. An external 30-amp AFS, AGU, or MAXI fuse (not included) must be installed on the power wire. If a wiring kit is used which includes a fuse with a value other than 30-amps, the original should be replaced with a 30-amp fuse
Speaker Output Terminals: The JL Audio JX250/1 features four set-screw speaker terminals for an easy parallel subwoofer connection. The monoblock amplifier's four set-screw speaker terminals will accept 16 to 8 AWG speaker wire. A 2.5mm hex-wrench is supplied for making connections.
Preamp Inputs: The monoblock amplifier features one set of stereo RCA input jacks. The amplifier features a dedicated Input Sensitivity gain control for these inputs. These controls are designed to match the input sensitivity of the JX250/1 to the specific signal source that is feeding it. The amplifier's low-level input can be set between 200mV-4V RMS.
Speaker Level Inputs: The JL Audio JX250/1 also accepts speaker level signals, including those from factory systems (without the need for a line-output converter), via the supplied 10" speaker-level harness. The amplifier's high-level input can be set between 2V-10V RMS.
Preamp Outputs: The JX250/1 incorporates a pass-through preamp output section, so that additional amplifiers can easily be connected to the same signal(s) feeding the monoblock amplifier. These preamp output signals are buffered to prevent noise and are always preamp level, regardless of the level of signals feeding the amplifier's inputs.
Our Product Research Team
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Why did you buy this?
A friend recommended it [ Lakeisha Jan 13, 2017 ]
Was suggested by your site [ JEREMY Dec 08, 2016 ]
JL audio is good stuff, I have been impressed with their speakers and hope this amp is just as good [ MATHEW Jul 31, 2016 ]
love jl audio and that's all ill ever buy tried and true quality [ Bryan Feb 10, 2016 ]
Everything u carry has always been GREAT QUALITY.... [ RYAN Jan 25, 2016 ]
JL audio makes awsome stuff [ KURT Dec 05, 2015 ]
5 questions already asked
Thanks for your question. For information on selecting the best amp/sub combo I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They will be able to help determine the differences between the models and help you make the best choice for your system. [ Kenny Apr 22, 2017 ] Staff
I followed the directions provided with the amp for all the wiring and connections. Sorry I could not be more helpful. [ KEN Nov 26, 2015 ]
Anthony you can not bridge this amp. It will become unstable bridged and go into a safe state. Meaning the amp will shut down. Also you have to be careful if you are running the more than one sub. If you are running more than one sub you need to check the ohm rating on the subs. Depending on the ohm rating on the subs will determine if you need to wire the subs in series or if you can run the subs in parallel. Hope this helps. [ Kurt Nov 25, 2015 ]
I can't quite remember but it is in the manual. [ BLAINE Nov 25, 2015 ]
No you can not. It's a mono amp. But I found out you need to run 2 positive and two negative wires to a 4om single voice coil speaker [ Steven Aug 24, 2015 ]
Yes it can be bridged [ BOO`S SECONDHAN Aug 23, 2015 ]
The amp only has one output so it can not be bridged. [ Kurt Aug 23, 2015 ]
NO you can't it is a single channel amp. If your looking tobridge checheck out 2 or 4 channel amps. [ kenneth Aug 23, 2015 ]
I bridged mine. Only noticed a slight difference but it will work. [ Albert Aug 23, 2015 ]
I'm currently using the JL.AUDIO 10w6, and its powered by the JL 500/1, perfect match and incredible (Awesome) Bass and Sound, plays exceptionaly Clean and Clear "PERFECT MATCH" Sounds Awesome!!!!. [ Craig Jun 11, 2014 ]
I have this amp and stealthbox in my 2006 silverado, love it... [ JOHNATHAN May 30, 2014 ]
With this amp it's a mono amp so you will need to find out what ohm rating your speakers are and wire them the correct way so they read for 4 ohms at the amp [ Steven Aug 24, 2015 ]
The answer to this is in the manual, you can go on jl audios site for it. I connected it to one so I can't say from experience. I know you can though as there are connections for two subs. [ BLAINE Apr 21, 2014 ]
Wire the subs in parallel if they are 2 ohm. 4 ohm subs can be wired in series down to 2 ohm. [ joseph Apr 21, 2014 ]