Bermuda,Thanks for posting. I've never seen a double headed Impact kit, at least not that I am aware of. Do you know what their though process was regarding the "hand hole" on the front of the shell?
They had 2-headed toms (Laser series) when I first met them in 1985, but their signature was the concert tom cutaway (Lightning series.)
[img]http://www.bermudaschwartz.com/images/impblack.jpg[/img]
[img]http://www.bermudaschwartz.com/images/folds.jpg[/img]
(Ben Folds played piano on an Al track, but he can also plays drums.)
[img]http://www.bermudaschwartz.com/images/kit070505.jpg[/img]
[img]http://www.bermudaschwartz.com/images/mfn3.jpg[/img]
They marketed marching drums to schools (and OEM'd the McCormick's Ultralite drums) because they were very light, and and younger players could carry them more easily. The "sound holes" were meant accentuate the attack on the field, although with a cutaway concert tom, there was already plenty of that. But as evidenced in the photos above, not every drum got that treatment.
I think they were also doing it in their 2-headed toms at the time, which made more sense, and it was my suggestion that they put a hole in the kick shell to allow using an internal mic while preserving the look and sonic integrity of the reso head. So AFAIK, the concept of a vented kick started with me around 1986. :)
[img]http://www.bermudaschwartz.com/images/impvents.jpg[/img]
Bermuda