REV 410 V2 | Wet Sounds Revolution Series Dual 10" Black Tower SpeakerREV 410 V2 Revolution Series 10" Gloss White Tower Speakers. 1 7 8" 3" Mounts 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