I use a giant Prince dampener from the 90's that completely stretches across strings at the bottom. Tried several others including the Gamma Redeye, Buzzkill, and TNT core dampener. They are OK but not the feel I was looking for. Still default to my old Prince...I guess I like a really board feeling racket.
Discounted Prince rackets, cheapest string I can get, strung at 60+ pounds, clothed in any name brand under $10.00 mixed with Target.