MartinLogan ML-65r Stereo Outdoor All-Weather Landscape Rock speaker Gray Stone) All-weather outdoor use discretely disguised as a landscape rock. Stereo playback from one speaker (or bridge for mono) Weather, water, and UV-resistant enclosure Dual coaxial-mounted titanium dome tweeters and mineral filled-polycone woofer with dual voice coil. Sealed self-draining enclosure with pre-installed wires for installation.