The following was originally posted by Hellfire over at Vdrums.com:
Most people when they get into DIY edrumming for the first time, they tend to use the Remo practice pad conversion. Split the foam in half, attach a piezo to a metal plate of some kind, and sandwich it between the foam halves. That works OK, (rolls and flams suffer a bit) but for my way to work I need a little more shell depth. Well, my X4L has that depth. The system has four layers.
Layers #1 & #2 – 1″ thick Poly-fil batting
Layer #3 – mylar disk (yes the same as a drum head) with one 27-mm piezo attached to the bottom with 3M chemical resistant double stick tape.
Layer #4 – 1″ thick Poly-fil batting
This is placed under a mesh head.
I know what you are thinking, you’re thinking “The piezo wouldn’t last 1 hour”, but you would be surprised at just how well it works. I’ve even road tested already. (yes, I gig out). This system is much more sensitive than the old foam-metal-foam style, and it seems it trigger just as good as my Roland cone drums. I most also say that it doesn’t feel like you are hitting a foamed back drum trigger. I think most of us here know that hitting a edrum that has foam behind the head just “feels” bad. It looses the bounce and has a bad thud. My new sensing system does not feel like you are hitting foam, because you aren’t. Poly-fil is a lot less dense than foam, this is why I use a mylar disk instead of metal. The Poly-fil also, does not dampen the bounce as severally as foam. The end result of using a mesh head with my new system really does give you the feeling you are playing on an acoustic drum. You still have bounce, but it is not like a trampoline, it is more like a mylar head.
In the pictures you will notice that I had to retro-fit my X4L. I couldn’t have anything in the cake pan because of how close the mylar sensing plate sits to the bottom of the pan, so I ran the wire out the bottom into a project box. Here’s some pictures:
Well, there it is. I hope people try there own experiments with this system so I am not the only one who knows how good it is. eDrumming for me is one big experiment, so I am always changing, tweeking, and messing with my designs.