This was a super convenient experience. It was as close to hands off as humanly possibly (aside from physically plugging in the laptop) and took about 15 minutes. My tech also helped me adjust the start/stop feature that I couldn't figure out via my OBD app. Thanks, Ryan (I think that's his name)!

I had a fantastic experience working with Ryan. I have a MK8 Golf R and had the Matrix headlights unlocked and the factory stereo upgraded. Ryan was very pleasant to work with and very knowledgeable on the subject. This was a very quick process and both upgrades work flawlessly. Highly recommend 👌🏻. The matrix headlights are something special for sure. And the audio upgrade is absolutely worth it. Thank you!

Fantastic! Its so very wild to me how modern vehicles can be so LOCKED from the dealer. But ACM TecTechnik has that key. They have been great to work with and I would love to do business again. Thank you!

Huge improvement on a majority of the frequency range. It has more power and blends better between EQ bands. Before, my EQ bands bounced all over the place, and now there is a smoother transition between them. While the higher frequencies are probably due to the stock HK speakers, everything else is great. Aftermarket speakers should make this pop. I do have a Cerwin Vega shallow mount passive sub, and even that sounds waaaaay better.

The picture is my current settings which sound the best in my opinion, but the sub level will be determined by the sub you have and gain/crossover setting on your amp or LC2i.

Product works great. Staff was very kind on the phone with questions and knew how to support my requests from the get go.

This upgrade along with a sub swap makes the hk actually sound like a premium system. Well worth the money and now I have the necessary cable for any future upgrades I might want to do. Ryan was very cool to talk to and rescheduled my appointment on the fly when UPS didn’t get the cable delivered ontime. I can’t recommend this this audio system tune (lol pun intended) or ACM Texhnik enough they are great!

It’s a good improvement, I’m not an audiophile but I like that the music sounds good and OEM set-up is a deception, with this coding, the sound is really good, the mid in oem are intolerable but now are ok, you can hear detailed sound, same sound curve when you increase the volume, like it was said before, it don’t make a miracle because of the limit of the system but it’s a great upgrade.

The only thing is that I don’t like the sound with the flat EQ like it’s recommend but with my EQ setting, it sounds really good

My major concern was that I don’t speak English very well but the guy was very comprehensible and if you have good skill with English reading, don’t fear, it was very easy and so fast, it takes only 15 minutes for 2 coding with a basic note book pc, you don’t need a super PC And if VW erase the coding, it was lifetime warranty and you don’t need to do a back-up like it was specified on the site, ACM have the back-up for you

The guy is a gentleman and I’m very happy to do business with people like you, 10/10, Thank You!

Its one of those upgrade I didn't think I needed, but amazing to have!

Had this feature on my previous vehicle, and I missed it a lot when I purchased my Golf R. Great to have it back! The purchase and install experience with Ryan was great as well.

Small change but big improvement, thanks!

Excellent Service and Functions

got the matrix activation and HK improvement done on my mk8R and I wake up everyday excited to drive my car again 100% recommend getting both done its a huge improvement, also a huge thanks to Ryan for doing it so quick and answering all my questions

Drive mode memory is essential for a Mk8R. It's a massive quality of life upgrade, especially as somebody that never really used sport mode. The guys at ACM are excellent to deal with. Highly recommend!

As always one of the best service over phone. Super friendly. The results after coding are amazing. My sound system is 100% better. It’s really worth it and recommend

Love the update was 100% worth the price to unlock the full functionality of the lights. To put a cherry on top Ryan was super knowledgeable with all things MK8 and had lots of advice about other upgrades available. Can’t wait to do business again!

One of the most pleasant and rewarding purchases and installs of my car modding life. These guys are awesome.

Got my Tig in January and 100% kicking myself for not getting this upgrade sooner. Pre-upgrade was like driving around in a black & white world. Then bam, Anthony uploaded his magic tune dust, the HK system woke from a slumber, and I am cruising in technicolor now. It took a day or two to realize the full impact. I wouldn't say it is a complete 180, but for the price and no hardware swap, this is as good as you can get for a non-intrusive upgrade. Anthony was awesome to work with, explained everything in detail, and stayed on the call to answer all my questions. Looking forward to working with him again to get the other activations installed. Money WELL spent!

I had a fantastic experience working with Anthony at ACM Technik to get my Matrix headlights activated. He is incredibly easy to talk to and took the time to share a wealth of information about my car that I didn't know. Highly recommend his services!

For anyone curious about how the Matrix technology actually performs in the real world, I have these activated on both my VW GTI and my Ford Ranger Raptor. They both function exactly as intended but in very different ways. Ford prioritizes a smooth, distraction-free lighting transition. Doing this, it sometimes tries to be too discrete and runs a little slow to react. VW, on the other hand, gives you a highly responsive, segmented light show where you can see the individual zones actively working and reacting in real-time, almost like playing keys on a piano.

This is a must do modification if you have the factory Harmon kardon. The sound quality is instantly improved and provides the level of quality that should have been there from factory.

Ryan and the team are very friendly and responsive, answering all questions and detailing the task as they go.

I recently had my matrix headlights activated by ACM Technik LLC, and I couldn't be happier with the experience. From start to finish, the process was smooth, professional, and exceeded my expectations.

The team was knowledgeable, answered all of my questions, and completed the activation quickly. The matrix headlights now work exactly as intended, providing excellent nighttime visibility while automatically adapting the high beams to avoid dazzling other drivers. It's a feature that has made driving at night both safer and more enjoyable.

The adjustment completely transformed the audio experience. The soundstage is much wider and more balanced, with clearer vocals, improved instrument separation, and richer bass. Everything sounds more natural and immersive.

Ryan provided outstanding service throughout the process. He was knowledgeable, responsive, and made everything easy from start to finish. If you're looking to get the most out of your Harman Kardon system, I highly recommend ACM Technic.

Definitely a noticeable improvement over the factory sound processing.

Huge upgrade on the HK system sound, totally worth it and i highly recommend it!

Acm made HK system sound great again!

Amazing upgrade night and day sound difference!! Great to work with thank you!

Great update and excellent service !
Thanks you