Just recently got these goodies for the car and am very pleased with the sound! I wanted to share my video with all of you as there were some inquiries about this setup.
I dealt with Andrew @ AA and he was a great deal of help in getting these items to me.
There isn't much drone at all on the highway just cruising, but it opens up when you really get down on the throttle. Cold starts are VERY loud. The first time I heard it, I thought something broke off (it was resonating in a garage as well). It gets quiet after about 15 seconds though so it's not bad.
The video is on FB so I hope this works.
https://www.facebook.com/photo.php?v=4394682865041
The microphone on the iPhone just doesn't do it justice.