somthing I did to save some money and this works really well and sounds good to.
I have a
remo powerstroke 3 on the kick, I got this square foam and I gued it in a half circle to the inside of the lick head and then take out any other muffling that you have in there and then tune, it works really well if you have 2 people to tune (you and someone to hit the drum while you tune).
put the half circle just above the center of the head.
the foam I got was at ace hardwear but you can pick it up at almost and hardwear place and it will be air condtion foam 1" x 1",
Im telling you this works great