This Theater Solutions by Goldwood 70 Volt transformer turns any 8 ohm speaker into a commercial-style constant voltage speaker. The impact resistant, weatherproof ABS design is especially useful when installing the 70V to outdoor speakers in a commercial setting. Cable seals prevent shorts caused by moisture, and corrosion is kept to a minimum. Easy set tap selections of 2.5, 5, 10, 15, and 20 watts are available when used with an 8 ohm speaker on 25V, 70V, and 100V systems.