sound upgrade

Hey guys, Previously, I did soundproofing for my other cars, and this time I did it for my IBIZA. Since the materials I used were relatively much cheaper, I did not expect a significant change, but I was still satisfied. First, I did the trunk area, then under the hood, and finally under the...

Hi guys, new here so I think its a good way to start posting. I have a Cupra ST 290 with Beats Audio and as many knows, the quality is pretty much poor (understandable for what you pay tho) so I decided to upgrade it keeping the original look, Navi and amp. How much did I spend? less than...