Symphonic Series 100% aged Maple Concert Bass Drums offer the professional player all the warm, well balanced tonal qualities, excellent projection, and lasting resonance you'd expect from Pearl, and demanded by audiences around the world. Symphonic Series Concert Bass drums provide a solid resounding bass tone with size options that will expand your understanding of what a bass drum can do. 100% Maple shells are the primary material used in concert percussion because of its well-balanced tonal response and sustain. The Symphonic Series bass drums feature an extended range with 36" diameter shells offered in 20' and amazing 26" depths for more power and low end enhancement. Tuning is fast and easy with Pearl's exclusive Silent Tensioning Lug System. Each oversized t-handle lug and claw is insulated at every contact point with itself and the shell to assure that there is no rattle possible from the drum. 8mm thick tuning rods have coarse threads so that quick adjustments can be made to adjust for temperature and humidity in the hall. 100% maple hoops provide superior durability and even tuning. Each bass drum has 2 acoustically located air vents to allow the drum to breath for superior response and projection. These bass drums come with Remo NuSkyn Heads and are available in Matte Walnut Lacquer finish.