When used as a bottom or resonant head, the CC resonates with a warm, clean, and choke-free response. A Note on Resonant (bottom) Heads-The resonant bottom drumhead is often neglected but has a significant effect on the overall tone of the drum. A poorly made or poorly tuned bottom head will sap all the tone out of a great drum. Spend time getting to know your resonant side drum head and you will greatly improve the overall sound and performance of your drum.