The HYPAC C778B is a heavy-duty smooth drum roller designed for high productivity in asphalt and soil compaction. It features a 78-inch wide and 48-inch diameter smooth double drum system with dual independently variable vibration frequencies ranging from 2,000 to 3,200 vibrations per minute (vpm), allowing precise density control across various material types. Powered by a robust Cummins 4B 3.9L turbocharged, aftercooled diesel engine delivering 130 hp, the C778B ensures ample power for demanding compaction tasks. The machine incorporates a full hydrostatic dual drum drive that provides smooth speed and directional control with an inside turning radius of 150 inches, enhancing maneuverability on-site. Its operating width is 92.5 inches, providing efficient coverage with a static linear load optimized for compaction effectiveness. The model includes advanced Multi-System Performance Indicator (MSPI) technology that automates vibration start/stop functions and controls rolling patterns, enhancing compaction uniformity and operator ease. Its radial pneumatic vibratory-drum isolators minimize operator fatigue while extending component life. The C778B delivers industry-leading vibration frequencies compatible with a wide range of asphalt mixes and soil conditions, enabling high rolling speeds and improved productivity. Additional features include a pressurized water spray system for drum cleaning, canopy with operator comfort measures, and heavy-duty transmission and steering systems built for reliability in tough environments. Overall, the HYPAC C778B offers industry-class compaction performance ideal for mainline paving projects, highway subgrades, and large commercial developments requiring precise and efficient soil and asphalt compaction.