Not really, it won't help on any of the frequencies of your door mounted driver. I disagree mainly because I've tried it, and it makes a difference. Most people might be intimidated by your SSA tech team and your 40,000 posts and just take your word for it. I think, however, that you are just against it because it's not the "proper" thing to do. Yea, there are better ways to get a better result, but this does have some effect and you can't deny that. hey man no need to lose your lid on this, about 99.5% of the time m5 is coorect in his thinking and reasoning, he will not steer you wrong or bully ppl around. he just puts his brain in motion before his keyboard! other then that we did use donald duck tape in my buddies car and he LOVED it then one night i stole his keys and ripped it ALL out, while it was dark outside and i think i must have been drunk to actualy do it all, and then a week later I asked him "how he liked that duck tape?" he siad "man i am glad i did it! i love it" and then i tossed him a BALL of duck tape and said "well it isnt' doing jack for you b/c i took it all out when you werent' looking!!" or maybe he was passed out...overall i took it out lol he didn't even catch on, but if he would have told me man i don't know i don't htink it is doing much then i would have felt like a dick and i wouldn't have tossed hhim the ball lol!