Revolution Dual 10" EFG 4 ohm EFG™ HLCD Tower Speaker w/ Fixed Clamps that fit 1-7/8" to 3" pipes. The Revolution™ Series uses our proprietary REV TEC™ technology. Unlike most conventional designs, REV TEC technology provides remarkable volume and amazing full range sound quality on axis and off axis at long distances. Extensive acoustic testing has confirmed these speakers ability to project volume at 80 feet and beyond without any loss of detail or information. Not only does the Revolution series achieve volume and sound quality at a minimum of 80 ft, but with the REV TEC technology the rider can enjoy quality sound while riding outside the wake and being almost parallel to boat. Specs - • Impedance: 4 ohms • RMS Watts: 400 • PEAK Watts: 800 • Frequency Response: 20Hz to 20KHZ • Sensitivity: 92 db at 1watt/1 meter • Mid Bass: Dual 10 inch HLCD Tower Speaker • High Frequency: Separate Titanium Diaphragm High Output Horn Loaded Compression Driver Size & Weight - • Hang Height 11 inches (279.40 mm) • Height: 11 inches (279.40 mm) • Width: 28.5 inches (729.90 mm) • Depth: 20.5 inches (520.70 mm) • Clamp: Clamp center to center: 9.25 inches (234.95 mm) • Hang Weight: 36.2 pounds each • Note: All specifications are for each REV410 enclosure