I will be curious to see if he answers your question. He definitely didn't answer mine. Either that or he didn't read my post before quoting and replying.
I just installed my system this week and did a 400 mile drive. I LOVE it. There is a hint of drone at 70 mph but you have to try and listen for it. With the stereo or AC on, it fades into the background. I cannot believe how happy I am with this system, especially for the price! I'd do it again 100%.