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JL Audio JX250/1

Mono subwoofer amplifier — 250 watts RMS x 1 at 2 ohms

16 Reviews | 5 questions - 14 answers

Item # 136JX2501

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Our take on the JL Audio JX250/1

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.

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.

Confused about impedance? Check out our article on matching subs and amps.

Product Highlights:

  • 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

What's in the Box:

  • Monoblock subwoofer amplifier
  • 10" Speaker-level harness
  • 4 Mounting screws
  • 4 Flat washers
  • Hex-key
  • Owner's Manual

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


JL Audio JX250/1 Reviews

Average Customer Review(s):

(16 Reviews)

JL Audio JX250/1

Jared from Snellville ga on 3/4/2017

I have one pushing a single jl audio 10inch sub in my wifes oddessey. It sounds great at all levels with any type of music. I used to compete in the IASCA circuit years ago and I only will use JL Audio subs. I have taken home 8 best sound trophies and won 1st place in my 1000watt+ unlimited class 16 times with the same set of speakers. Awesome products

Pros: Great sound, power handling and work well in a smaller enclosure

Cons: None

Great Sub Amp

Anonymous from South Carolina on 10/19/2015

Crutchfield Customer Review (What's this?)

Great amp. I'm using it to run a 2ohm sub. No issues what so ever. Plenty of power for my application.




Gary from Texas on 10/10/2015

Crutchfield Customer Review (What's this?)

Used this amp to power a 10" JL stealthbox in my 2015 Ram Crew Cab. I kept the head unit and ran a Active LOC from rear door speakers. Hardly have it turned up very much and the bass is unbelievable. You can't go wrong with JL Audio. I have been in love with JL products since my teen years....41 now. If you are looking to power a single sub, this amp will definitely get the job done.

Pros: Price, Quality of Product, Ease of installation

Cons: None

Perfect amp for an Xterra Stealth Box

Justin H from Qatar on 3/26/2015

Crutchfield Customer Review (What's this?)

This amp was the one recommended in the documentation for the JL Audio Stealth Box for a Nissan Xterra, and it's perfect. Also, it fits perfectly under my passenger seat. I highly recommend also getting the JL Audio RBC-1 remote bass control.

Pros: Provides great sound to a 12" sub Fits well under the passenger seat of a Nissan Xterra Available remote control gives great flexibility


another jl paperweight

Anonymous from paw paw, mi on 3/12/2015

Had it for a week. Went into protect mode running a pair of jl audio 8s. Exchanged it. Second one lasted 4 days, returned it last a week. Gave up on Jl audio.



Great Product

JaredL from Georgia on 2/7/2015

This is a great amp! I have it powering one Memphis 15-PR12S4 250 RMS. It pushed the sub so hard it split the seams on my sealed box! Now i need to build a custom box, Haha. This amp provides amazing sound quality and great power! Easy adjustments and a great value. And of course, since its a JL amp, it is built amazingly well.

Pros: Great power, sound quality, well built, Great Value!

Cons: None so far!

Very Satisfied!

ATJR from Lubbock TX on 11/16/2014

Crutchfield Customer Review (What's this?)

Have been wanting this amp for a long time. Will never buy any other brand besides JL Audio.




Nancy from Pleasant valley, NY on 5/6/2014

Crutchfield Customer Review (What's this?)

Sounds great and a great company!!



well this is my opinion, this small but very powerful amp " rocks ", t

Philipp (phil-roy) Collins from Sequatchie, tn. 37374 on 3/3/2014

One kick and amp, the best amp I've ever owned.



JL amp

coachts from Granada Hills, CA on 1/14/2014

Crutchfield Customer Review (What's this?)

This amp provides smooth undistorted sound while running exceptionally cool. It delivers volume levels of higher rated amps of other brands. The smooth classy finish blends with the nice interior of the vehicle. Great match for my JL W3 sub

Pros: Excellent sound quality True wattage ratings Classy finish Easy setup

Cons: A little pricey but better than any other amp at that price


Joe from Philadelphia on 12/4/2013

Crutchfield Customer Review (What's this?)

Runs 2 of my 10w0's perfect.

Pros: Size price

Cons: None

Another great JL amp

BillE from Fort Worth, Texas on 7/13/2013

Crutchfield Customer Review (What's this?)

I am quite impressed with the quality and performance of JL Audio amps., especially for the price. This amp is paired with a JL Audio Stealthbox, and is a perfect match. It hits hard and stays cool/warm to the touch. Overall, I'm very happy.

Pros: Price, performance, size, reputation.

Cons: None.

JL/Kicker 250

JL250/1 from Exeter, CA on 10/3/2012

Crutchfield Customer Review (What's this?)

Very happy with this amp. It matches perfectly to my Kicker TC10 compact sub. The bass is well matched and defined to my Pioneer DEH 8600BT head unit. I do not know if it is the AB class circuitry but this amp offers great fidelity. I had a JL class D AH1400 amp and it was a bit "boomy" at the low end. The JL 250 amp is perfect for those looking for crisp bass without needing huge seismic rattling power.

Pros: great defined fidelity. smooth bass without distorting "boomyness"

Cons: none

JL JX 250/1

Rob M. from Larose, LA on 3/9/2012

Crutchfield Customer Review (What's this?)

It has only been connected for less than a week, but as usual JL has done its job again. I have not noticed the amp get hot after extended play time. The sub it is connected to (20 yr old JL 12 W1-4in a bandpass box) and it hits hard enough for what I am using it for. It hits the 20hz notes clearly. On the other end Crutchfield has come through as well with excellent instructions great price and friendly staff that has been able to help me out when ever I get stuck.. I would suggest this amp to anyone driving a sub that does not have outrageous power requirements.

Pros: Great directions regading installation. NIce power as mentioned above.

Cons: None so far

You wont be disappointed!

MattD from Eau Claire, WI on 2/12/2012

Paired this with a single 8W1v2 4ohm sub. I had the sub on a factory amp for a few days before the JL Audio JX250/1 came in. On the factory amp the sub sounded slightly better than the original sub did. Once I hooked up the JX250/1 the sub came alive!! I really can't believe the sound quality from these products! Could not be happier with both products from JL!!

Pros: Sound quality, runs cool, looks great, doesn't miss a beat.

Cons: NONE

rock without it

paul from newnan ga on 8/6/2011

I had a Alpine head unit with some 6 1/2 polk speakers installed in my 200 GMC standard cab.It just was not loud enough for me so I purchased a small alpine power pak. It got loud but the highs just too high and not enough bass,old time rock music just didnt sound right So i went to Ative Radio and the guy suggested an amp and sub to bring out the bass. checked around and was interested in the 500watt Alpine and sub. But no the box wouldnt fit behind the seat in a reg cab truck. I went back to the guy at Active Radio and he suggested the JX250/1 and a 250 watt sub. I was not wanting it due to low wattage and didnt think it would do the trick but went with it anyway. Wow Wow Wow, now the old time rock and roll sounds, well amazing. So yes you can buy this amp and be very pleased i assure you. The only reason i didnt give it the highest rating is I havent had it long enough to see if it will hold up. I now trust the guy and take his word it will be around a long time.




Hands-on research

Product Research



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.

Amplifier Ratings:

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

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Q & A

Customer Q&A

Crutchfield asked  
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 ]