Meinl WD16WB Sonic Energy Wave Drum - Walnut Brown - 16"The MEINL Wave Drum is a two headed percussion instrument with two discrete timbres that invoke wholly different moods. This drum creates soothing sound, reminiscent in its way of a gentle, steady surf with crashing waves. This is achieved with a grouping of sealed steel balls that are placed between the two drumheads. One of the heads is synthetic and the other is made with natural goatskin. A sealable filling port allows you to control the amount of