JL Audio JD400/4
Crutchfield customer from Cranston, RI on 1/30/2021
2018 Dodge Charger
Pretty good amp. Seems to do the job, but my speakers blew. I dunno if it was because the amp or not. But otherwise it works good.
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0 of 1 found this helpful
Amazing little amp!
Crutchfield customer from Pasadena, CA on 1/30/2021
This amp rocks! I have this powering a set of morel coax up front and morel 6x9s in the rear deck of my 62 coupe deville. At first I had the speakers powered by and old eclipse 3640. The eclipse was and is still an amazing amp but thi JL 400/4 really made everything come to life! I love how compact and powerful it is! I would definitely recommend!!!
Pros: Price, size, sound
Cons: None
0 of 0 found this helpful
JL Audio JD400/4
Crutchfield customer from Beaverdam, VA on 1/29/2021
2012 Toyota FJ Cruiser
Installed myself under passenger seat in 2012 FJ Cruiser. Took 2 days, but I took my time and followed instructions from Crutchfield and Youtube videos. The wiring harnesses and extras that Crutchfield told me I needed came in very handy. Also installed JL Audio C1-690 speakers. Much better than the stock system and plenty loud.
Pros: Good Power Fits under seat wire connections are arranged nicely
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0 of 0 found this helpful
JL Audio JD400/4
Crutchfield customer from Cypress, CA on 1/28/2021
0 of 0 found this helpful
JL Audio JD400/4
Crutchfield customer from Incline Village, NV on 1/27/2021
This is my 3rd JL Amp. Love the warm, crisp, clear, sound it produces. I'm using Polk speakers on all 3 amps and the sound is amazing. I get compliments all the time on how clear and full the sound is.
Pros: Well made Priced fairly Great sound Fairly compact 75 watts is plenty for 4 speakers in a car/truck. You can go with more power but it's like hunting squirrels with a 12 Guage. This is a really good Amp.
Cons: Someone has to install it?? No cons at all.
0 of 0 found this helpful
JL Audio JD400/4
Roger from , NJ on 1/26/2021
2009 Chevrolet Impala
JL build quality is superior and sound is robust with clarity. Will buy again.
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0 of 0 found this helpful
Nice little amp
Nathaniel from FLORISSANT, MO on 12/28/2020
2013 Volkswagen Passat
This amp has great clean power and was very easy to install. The clipping indicator made it very simple to set the gain. I used the crossovers in the head unit so I did not need to dig into the other amp tuning functions.
Pros: small size, easy to install and tune
Cons: none
0 of 0 found this helpful
JL Audio JD400/4
Crutchfield customer from Wichita, KS on 12/20/2020
2013 Ford F-150 Lariat
0 of 0 found this helpful
JL Audio JD400/4
Crutchfield customer from Kissimmee, FL on 12/18/2020
Great product for the buck!
Pros: All good!
Cons: None!
0 of 0 found this helpful
JL Audio JD400/4
Crutchfield customer from Phenix City, AL on 12/18/2020
2010 Ford F-150 FX2
Great amp for my door speakers at a great price
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0 of 0 found this helpful
JL Audio JD400/4
Crutchfield customer from Los Angeles, CA on 12/17/2020
2016 Jeep Wrangler Unlimited
I had this amp professionally installed and it's pushing focal components and 6x9 in the cabin of my charger. It seems to have plenty of power to make the focal speakers come alive. This is the first amp I've purchased in 10 years and I have no problems with it. Small foot print makes it easy to install in a stealth position. I would highly recommend.
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1 of 1 found this helpful
Its a winner
Crutchfield customer from Kailua Kona, HI on 12/13/2020
2020 Toyota Tundra
I'm using this amplifier to drive a set of 6 1/2 components in the front of my truck, and a set of 6 1/2 coaxials in the rear doors. This amp does a great job, no hissing or wining. It's also pushing the speakers to very high volume levels without distortion. The price is right and I'm very satisfied
Pros: Price, volume , clarity
Cons: None so far
2 of 2 found this helpful
JL Audio JD400/4
Crutchfield customer from Walker, LA on 11/21/2020
So far, so good. Very versatile for my needs. Currently have 2 infinity reference 9632ix hooked and they sound phenomenal! No distortion , no overheating. I Intend to put a DD508 on it later and think it will do just fine with the added load.
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0 of 0 found this helpful
JL Audio JD400/4
Crutchfield customer from SAUK RAPIDS, MN on 11/7/2020
2006 Subaru Outback
Does the job well. The clipping light indicator is very handy for tool free tuning.
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1 of 1 found this helpful
Solid amp
Crutchfield customer from Seadrift, TX on 8/2/2020
0 of 0 found this helpful
JL Audio JD400/4
edward from NEW HOLLAND, PA on 7/30/2020
good power for a good price
Pros: easy install , clean look , powerful
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0 of 0 found this helpful
Quaility Amp Great Price
Jim from Minneapolis, MN on 7/29/2020
2008 Chevrolet Avalanche
I am using mine as a 4 channel crossed over at 80Hz. speakers are infinity 2 ohms . It does run blazing hot in the summer at moderate to higher volumes after about 20 minutes (my time to work). I will probably purchase an aftermarket fan for it. Overall has good options. High Quality connectors for power, ground, and speakers. Have not tried to adjust gain yet using user instruction manual only by ear. I would have to disconnect all 4 speakers if I do that or risk blowing them.
Pros: Powerful Super price! JL audio has some other models way overpriced and same power as this one with some extra frills? Good quality power, ground, and speaker connectors
Cons: No installed fuse Runs hot with 2 ohm 4 channel loads (too hot for my hands to touch for over 1 second)
1 of 1 found this helpful
JL Audio JD400/4
Crutchfield customer from Tucson, AZ on 7/25/2020
2006 Dodge Durango
Made my speakers INCREDIBLY loud, so much that I actually had to dial the input sensitivity back a little in order to not drown out my 12" alpine type R sub in the back. Provides sound clarity and volume well beyond what I anticipated!! All this and still compact enough to fit right under the driver's seat. Thank you JL and thank you Crutchfield!
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2 of 2 found this helpful
JD400/4
Crutchfield customer from Hemlock, MI on 7/23/2020
2007 Chevrolet TrailBlazer
Everything works as it should.
Pros: Easy to adjust for clipping
Cons: I'm not big on the style how the wires crimp down
0 of 0 found this helpful
JL Audio JD400/4
Crutchfield customer from Saint Paul, NE on 7/18/2020
Very high quality, lots of nice features, and solid power for the price!
Pros: Love the input sensitivity light so you always set your gain correctly!
Cons: No subsonic filter
0 of 0 found this helpful
Screams
Josh from Moberly, MO on 7/5/2020
2002 Mazda Tribute
Great little amp. Easy to install and setup. My stereo is so loud and clear.
Pros: Clip light for properly setting gain
Cons: None
2 of 2 found this helpful
Typical JL quality.
Crutchfield customer from Sacramento, CA on 7/5/2020
2004 Dodge Ram 1500
This thing is awesome. I'm powering two JL C2 6x9's and two JL 5 1/4's. Plenty of power. The clipping light makes tuning a breeze.
Pros: Compact, powerful, easy to set up.
Cons: None.
2 of 2 found this helpful
JL Audio JD400/4
Crutchfield customer from Flint, MI on 6/17/2020
2012 Jeep Patriot
1 of 1 found this helpful
JL Audio JD400/4
Crutchfield customer from Wenonah, NJ on 6/15/2020
2011 Dodge Nitro
0 of 0 found this helpful
JL Audio JD400/4
Crutchfield customer from Broadway, NC on 6/1/2020
2012 Ford F-150 FX2
Fantastic amp. I couldn't believe the way it made my kicker speakers come to life! The instructions on how to setup and calibrate were very easy as well. Highly recommend JL Audio products.
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3 of 3 found this helpful
JL Audio JD400/4
Crutchfield customer from Soddy Daisy, TN on 5/24/2020
0 of 0 found this helpful
Great value here.
Crutchfield customer from Saint Paul, MN on 5/18/2020
2016 Toyota Corolla
This is a great amp at a great price point. It's decent sized and easily fits most places, such as under the seat or hidden in the trunk. Sound is great at it fits a budget install perfectly. Depending on your budget, I do find that the RD line of amps are easier to initially install and tune, but this one worked great for this car.
Pros: Inexpensive, good size
Cons: The RD line is a little easier to initially set up.
0 of 0 found this helpful
2012 F-150 install with no issues
Crutchfield customer from Lexington, KY on 5/11/2020
2012 Ford F-150 FX4
Purchased in late April 2020 and installed as a replacement to a previous amp that failed. Absolutely no issues with the unit, directions were clear and supporting documentation from Crutchfield was very helpful
Pros: size, cost, simplicity
Cons: none.
0 of 0 found this helpful
Love JL Audio
Crutchfield customer from Rhinelander, WI on 5/10/2020
Powerful and clean sound.
Pros: Easy connections and tuning
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2 of 2 found this helpful
Great for the price
Benjamin from Mc Rae, AR on 5/10/2020
For this being JLs entry level it does a very good job powering my Focal Flax woofers from my 3 ways and rear Hertz Cento 6x9s. Good clean clear and crisp sound. Would recommend on a budget
Pros: Price to performance, clean crisp sound, ease of installation
Cons: None that any other amp in the price range wouldn't have as well
2 of 2 found this helpful
awesome
Crutchfield customer from Astoria, NY on 5/9/2020
0 of 0 found this helpful
JL Audio JD400/4
Crutchfield customer from Mount Vernon, IN on 4/27/2020
1978 Chevrolet C Series
1 of 1 found this helpful
JL Audio JD400/4
Crutchfield customer from Talladega, AL on 4/20/2020
2007 Dodge Ram 2500
Works great built well very nice packaging easy installation
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2 of 2 found this helpful
JL Audio JD400/4
Guest from Clearwater, FL on 3/7/2020
1994 BMW 525I
1 of 7 found this helpful
