Drum sound has four variables. How the drummer strikes, brand/material of the drum, how the drum is tuned and how the drum is mic'd (and processed). Bonham clearly was a powerful striker and I belive he played Ludwig maples. The book "A Thunder of Drums" details the exact drum kits and tunings Bonham used. With that as background, do not underestimate the contributions of Jimmy Page (producer) and Andy Johns (engineer) to the recorded sound of Bonham's drum. Their's is more than 10% of the actual sound you hear on LZ's records.
