 Averaging over 600 speakers powered by a minimum of 48 600-watt amplifiers, the massive and experimental sound reinforcement system advanced the technology but presented an array of physical, audio, and technical difficulties.It required four semi-trailer trucks to transport and, due to the rigging time, necessitated two leapfrogging road crews with separate scaffolding sets.Adding the employees required to operate the band's Grateful Dead Records label (and sub-label Round Records), publishing entity, direct-to-fan mailers, and other business operations, personnel was several hundred.