Anyone used Sonicbarrier MX4 from Parts Express? If so, what has your experience with it been? On Sunday I had to remove my door card as it sounded like the midbass was making terrible noise (think it's hitting the door card at high volume). Anyway, with the door card removed I noticed that the MX4 looks to have been melting inside my door.
There are spots on the bottom of the door card where it has dripped, as well as areas it looks like it melted and started seeping down. What's most disappointing to me is it's not even been installed more than a year, might even be only about 9 months or so and on the inner door skin. It's showing as rated to 160F, which even taking into account humidity in VA and temperatures in the car, I highly doubt it's exceeded 160F. I work from home, so even on the hottest days, my cars sitting in the garage in the shade, not once has it been sat outside so day in the heat. I had planned to install more in the trunk, but will likely look elsewhere now.
Sent Parts Express an email Sunday with some pictures, but have so far heard nothing back which is also a little disappointing. I'm not expecting my money back at this point, but at least some acknowledgement that it shouldn't have melted. Now I get to plan a day or two to try and clean it all off before it gunk's everything up.