Remo Ambassador SMT CLEAR Bass Drum Head - 20"The Remo Ambassador SMT bass drumhead is a pre muffled design featuring Sub Muffl Technology. Constructed with 1 ply of 10 mil Clear or Coated film and an externally mounted dampening profile with free floating acoustic foam, it enables the head and drum shell to maintain complete sound characteristics with additional attack and low end frequencies. SMT technology allows a broad tonal spectrum of tuning ranges with controlled high and mid frequencies