The HMF slip-on puts 5HP on the bottom, 6 in the mid, and 4 on the top. Full does 5 on the bottom, 9 in the mid range, and 7 on the top. shorty or regular and HMF offers a quiet core too. Personally id go with the HMF
I''ve got a white brother's e-series. not sure of the exact increase, but it was enough to smoke almost everything it went up against at dumont. and it's only 96 dcb's. if i want louder, I only have to add more discs.