I replaced all the heads on my Yamaha DP drums with professional heads (all at Thomann) .The only one that was missing , was my bass drum head . After a long search , I decided to order the Aquarian super kick II . Unbelievable : I just had a new bass drum with the sound and kick I was looking for . Really guys : if you want that fat "dounk" and a pleasure to play on , please order this one . I am already in "love" with this head .