Hey, it doesn't matter...
He can hide behind the 'shield' of the behemoth that is Audiobahn.
Hell, forums full of thousands of credible enthusiasts bashing Audiobahn for years hasn't seemed to make a dent in their popularity or their sales - so Matt Overpeck is probably safe at this company.
Truthfully, Matt Overpeck was a PR nightmare - but he at least recognized the value of an underhung driver, and the value of a quality build house.
He embarassed himself basically when Dan Wiggins introduced XBL^2 with the very first Brahma - at that time, the architecture was confidential, and wasn't revealed (and I was trying to guess at it like everyone else!

)...
But Dan put up BL plots that showed the superiority of XBL^2 to underhung, and Matt ended up embarassing himself.
If he had been a bit humbler about things, he could have taken a different approach, and not embarassed himself. After all, in a post-XBL^2 world, it isn't as if there's no room for underhung drivers - but Audiomobile vanished in a poof of embarassement over bad behavior.
I'd point you to CAF to do some searching for threads - but apparantly Lee has disabled the search feature temporarily (I hope temporarily!).
There are some killer Dan vs. Matt threads on there - I wouldn't mind reliving that soap opera myself, for pure entertainment value.
As regards Audiobahn...
I've done some installs with Audiobahnthat were pretty cool, and (get this) technically appropriate even!
I had the privilege of doing all the fabrication and motorization on this truck - turning things over to one of our fabricators when it came time for upholstery (although I did help stretch - check out that sub box... one piece of vinyl, all stretched, no seams - front, sides, top.

).
I don't have "good" pictures of the sub box - there's a complete color changing LED undercar kit in there, with the tubes oriented so that the light patterns caused what looks like color shifting balls of light circling around the subs, through the plexi baffle I frosted:
http://www.kwbuffalo.com/gallery_f650.php
(The truck was for Lawyer Milloy of the Buffalo Bills - I'm not a fan either

That's his autograph in my backlit door pods)
The subs were chosen because I needed a super shallow sub - that flat piston has almost no mounting depth, and reasonable performance specs.
And there's me standing in front of an Audiobahn AWT34 in a plexi box I designed (1" acrylic with a mirrored floor, 20 cu.ft.):
http://www.kwbuffalo.com/about.php
...in retrospect, after spending time observing the mechanical excursion capabilities of this thing, there's no way you could get 5000w to this thing (it's rating) in an enclosure that large - and who cares about losing low end extension when your Fs is 18hz? I would have put it into a 10 cu.ft. box if I had it to do over again...
That box there is 36" tall, 48" wide, and 24" deep - tough to fit into a vehicle (plus it weighs about 600 pounds, literally). If I could do it over again, the box would be only 36" tall, 36" wide, and 18" deep - which would look like a tiny box for that sub... how many other subs can perform in a box that's no taller or wider than the sub frame, and just a few inches deeper than the mounting depth?
It would be fun to have just for the silliness of it... pop the trunk, "Here's my sub!" And it does get loud - bear in mind, in terms of displacement, equivalent to 49 of it's little brother the AWT10, one of Audiobahn's more expensive subs.
But that being said - I'm definitely not an Audiobahn fan, save for a couple interesting products like these.
Maybe Matt Overpeck will convince them to produce an underhung sub?