The Award Winning Omnispeakers® from TIC Corporation are the most experienced, tried, tested and proven exterior ground speakers available.The omni speaker series contains several Pro performance models. The GS3 Pro model is the latest and specially improved professional version of this famous speaker.OmniSpeakers® are Teflon® sealed with improved impact resistant and lower resonance cabinetry. An optional external in-line, â??on-the-flyâ?, switching constant voltage distribution transformer (TIC model SP70vTA) is available and may be purchased separately but NOT included. Taps: 0 common, (nominal 4, 8 or 16 Ohms), 2.5, 5, 10, 15 & 20 watt taps. A twist-removable lid for ease of installation and adjustment. High quality speaker crossover & weatherproof speaker driver.From the worlds most famous Theme Parks & Hotels to your backyard. The best value for money exterior omni speakers available just got a whole lot better!