Turn any standard speaker into a 70V speaker to be used with any Commercial 70V amplifier with this high-quality transformer. It's designed specifically for outdoor use, and all you need to do is plug in your 8-ohm speaker wire. The In-Line transformer switch with weatherproof design, and the input to output cable seals. 70V taps: 20W, 15W, 10W, 5W and 2.5W.