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Raxiom by JL Audio Base Stereo Upgrade Kit (15-20 w/ Base Stereo)

Item 393865
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      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • Raxiom Stereo Upgrade Kit by JL Audio
      • Provides High-Frequency Detail, Smooth Mid-Range and Powerful Mid-Bass
      • JL Audio Evolution C2 Speaker System
      • 125 x 180mm Woofer / 19mm Silk Dome Tweeter
      • JL Audio JX400/4D 4-Channel Class D Full Range Amplifier
      • All Cables and Connectors are Included for a Hassle Free Install
      • Fits 2015-2020 Mustangs Equipped with the Base/Standard OE Stereo


      Raxiom by JL Audio. When Raxiom decided to create a much needed upgrade kit for the 2015-2020 Mustang's base stereo system they turned to JL Audio. Working together, Raxiom and JL Audio hand picked the correct components to bring your Mustang's base stereo system to life. By employing four C2-650x Coaxial Speakers and a 4-Channel Class D Full Range Amplifier this Stereo Upgrade Kit will deliver sparkling high-frequency detail, smooth mid-range and powerful mid-bass that will rival the higher end factory sound systems.

      Evolution C2-650x Speakers. This Raxiom Stereo Upgrade Kit includes a set of four JL Audio Evolution C2-650x Speakers. The C2-650x is a 6.5-inch Speaker that will be a direct fit replacement for your factory installed speakers. The woofer features mineral-filled polypropylene cones with a durable stamped steel frame. The Tweeters are coaxially mounted and are manufactured using 0.75-inch silk dome diaphragms to provide smooth, extended response, on and off axis.

      JX400/4D Amplifier. To boost the power of your Mustang's base stereo Raxiom chose JL Audio's JX400/4D 4-Channel Full Range Amplifier. This Amplifier employs a highly-efficient Class D design with a MOSFET power supply to deliver a strong 100 watts to each of its four channels. Featuring a 12 dB octave filter for each channel bank, that can be configured as a low-pass or high-pass filter, this JL Audio Amplifier offers a continuously variable cutoff frequency selection from 50-200 Hz. Dedicated hi-level inputs are included, in addition to conventional low-level RCA inputs. These inputs make it super easy to install the JX400/4D Amplifier to your original factory head unit.

      Application. This Raxiom by JL Audio Base Stereo Upgrade Kit is designed to fit 2015 to 2020 Mustangs that are equipped with the standard OE base stereo system only.


      Fitment: 2015 2016 2017 2018 2019 2020 Details

      MPN# 393865

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (3)

      Write a Review

      Ratings Summary

      2.7 out of 5 overall rating from 3 customers

      • October 05, 2019

        1 2018 GT - BlackFox

        Don't Even Bother - It's a Joke!

        I was really blown away by this experience. Usually I've had good products and great customer service from American Muscle, but not this time. This kit is NOT even remotely complete. It does NOT come with instructions on how to put it all together in your Mustang, and it is missing SIGNIFICANT parts to make it a drop in fit, which it is NOT. There are NO adapters for the rear speaker plugs. There are NO adapters for the rear speaker mounts--the speakers in this kit are not drop in fit--too small for the mounting hole. When I reached out to AM and simply asked for the missing install guide, they kept telling me it's basic speaker stuff, I don't need a guide, then directed me to JL's generic speaker instructions. They acted like yes a guide was somewhere, but a print out at a different location and they couldn't get it to me. No, sorry we didn't include instructions, no solution was offered to email or mail them to me even though I repeatedly asked. But this being labeled "designed to fit" or by RAXIOM is the biggest BS as these are off the shelf components in their regular off the shelf packaging thrown in a box together and shipped to you, with no instructions on how it works in a Mustang or how to get to the speakers in your Mustang, how to tap the amp into the factory head, and it doesn't include nearly all the parts needed to make it plug and play. A huge joke.

        Helpful (10)
      • August 14, 2017

        2 2016 GT - KevinA

        Jl audio upgrade

        Kit is not complete you will have to buy adapters for the speakers to fit they are not Direct Bolt in kit sounds okay but if you are using the raxiom navigation it will not function properly with this kit you will have to get an additional line level and tap into the front speaker outputs because this Kit only has you tap into the rear and the navigation Works through the front.

        Helpful (41)
      • October 31, 2016

        5 2015 V6 - Pablotheartist

        Major improvement to the base sound

        After installing this, i cant even imagine how i got by listening to the base audio, the difference between this JL audio kit and the base speaker system is night and day. Truly unbelievable sound. Worth while investment!!!

        Helpful (30)

      Questions & Answers (19 answers)

      5 Top Rated Questions

      Are installation instructions included?

      • Yes, the installation instructions will come included with the box with the raxiom system.

      Helpful (6)

      Do I need crossover for these Coaxial speaker? And where should I put the AMP in my car?

      • If you building a system for competition or looking for optimal quality then a crossover will increase sound quality other wise its not needed for install.

      Helpful (2)

      How does this kit work with the stock A-pillar tweeters?

      • The Raxiom by JL Audio Base Stereo Upgrade Kit is going to be a direct fit replacement for your factory installed speakers and the Tweeters are coaxially mounted.

      Helpful (2)

      Will this work for the 12 speaker shaker system?

      • This stereo upgrade is designed to work for the Mustangs that are equipped with the standard OE base stereo system only.

      Helpful (2)

      will this work the shaker audio system

      • This is not compatible with the upgraded Shaker audio system.

      Helpful (1)
      Post Your Question
      10 More Questions
      hello, I do have the 12 speaker shaker system. The only speakers I want to replace are the four 6.5" speakers. Can I still use this system to only replace the four 6.5" coaxials? I will also be purchasing the subwoofer JL upgrade kit as well. Thank You 1 answer
      Do you need a digital sound processor to run this kit? Or Is this a plug and play kit? Will I need anything additional? 1 answer
      Will this work with the 2019 GT base 9 speaker/amp system? Is there a better alternative such as buying the components for the B O upgrade for the 2019's? 1 answer
      Hi, will this fit on a Mustang ecoboost 2017 Premium European version with the subwoofer in the trunk ? If yes, can I connect the 12TW3-D4 Stealthbox Subwoofer to the amplifier of this kit ? Thanks for the attention. 1 answer
      I have a 2017 Mustang GT Premium. All premiums have a 9 speaker system. Will this work with that setup. It is not the base system, but does not have the subwoofer or the 12 speaker system. 1 answer
      Can you get this upgrade kit and use a sub and amp you already own!? 1 answer
      I have a 2018 GT Premium with the voice activated touch screen -- AND the lame base level "AM/FM Single CD/MP3 Player". It sounds flat and low powered. Will this kit work for me? 1 answer
      To clarify: Will this work on the Premium car with a 400a package (8in screen non-shaker system. )? 1 answer
      Will this fit a 2016 gt350 mustang with tech package? 1 answer
      Can this system be installed in a convertible? If not is there one that does? 1 answer

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (4) Evolution C2 Speakers
      • (1) 4 Channel Class D Full Range Amplifier
      • (1) 2 Channel Adjustable Level Converter
      • Plug & Play Speaker Adapters
      • XD-MFB-MAXI Fuse Holder with Genuine 60A Maxi┬« Fuse
      • 17 ft (5.18 m) Red 60A Core Power Wire, terminated with ring
      • 3 ft (0.91 m) Black 60A Core Ground Wire, terminated with ring
      • 17 ft (5.18 m) Blue Remote Turn-On Lead Wire
      • 25 ft (7.62 m) Blue Speaker Cable
      • XD-CLRAIC2-18 2-channel, 18 ft. (5.5 m) Audio Interconnect Cable
      • Self-Tapping Ground Screw
      • Rubber Firewall Grommet
      • Nylon Wire Ties
      • Hex Wrench for Fuse Holder

      Will It Fit My Mustang

      • Bullitt - 19, 20
      • EcoBoost - 15, 16, 17, 18, 19, 20
      • GT - 15, 16, 17, 18, 19, 20
      • GT350 - 15, 16, 17, 18, 19, 20
      • GT350R - 15, 16, 17, 18, 19, 20
      • GT500 - 20
      • V6 - 15, 16, 17

      Fits Mustangs that are equipped with the standard OE base stereo system only.