The SONOR Smart Force Series - designed especially for beginners at an uncompromisingly attractive price. Extremely interesting for all up-and-coming rockers, jazz cats, enthusiasts of metal or the blues … or any drummer who’s looking for a drum set that is sturdy, yet versatile. Sound Smart Force Sounds-The 9-layer poplar shells of the SONOR Smart Force Sets are full bodied, providing balanced sound with lots of power up front.