Harman Kardon Sound System Improvement

This really made a difference to the overall sound experience of the stock Harman Kardon system in my European Golf 8 GTI. I was considering changing the Harman Kardon speakers for a punchier sound but decided to give this improvement a try first. I honestly did not expect that the sound could be improved so much without any hardware modifications! It is much more powerful now, with more bass but without the harsh mids. I also filled the sub with the poly-fill for cleaner lows as recommended. All in all, I am really happy with this improvement and do not feel the need to change the speakers anymore.

HK sound tune up

Definitely worth the cost, it is embarrassing that the car did not come stock sounding like this. Very straight forward process, does not take very long. Compliments to the chef.

Why not?

Nothing crazy here, but I can tell there's certainly a difference in clarity, especially at higher volume. It's not an expensive price, so it was definitely worth just tacking on to the matrix lighting and hill assist patch I was already ordering. Overall, definitely recommended.