Black AP640T 70V Transformer High-Definition 6.5"" Patio Speakers are weather-resistant with polypropylene woofers and 1"" Supernil soft dome tweeters. This model is often used in commercial projects where multiple speakers may be daisy-chained to cover large areas. The AP640T is 8-ohm rated with internal 70 volt Transformer Tap: 4W, 8W, 16W, 30W. Other features include all-weather design that protects this speaker from rain, snow, salt, water, pool chemicals and more. They also feature gold-plated binding posts and solid brass and stainless steel hardware. Rated at 150 watts. Due to their ported design, we recommend installing these speakers under eaves or other overhang.