The 15-2-SS is a high quality 15 inch two-way enclosure with a one inch compression driver on a 90º x 70º wave guide. The trans-portable version comes with two side mounted handles and a pole mount in a trapezoid shaped enclosure. While 15-2-SS is an excellent full range speaker in its own right, we recommend the TL 18.1 subwoofer as its companion for high-output, bass-heavy applications. The 15-2-SS is excellent for use on a tripod, pole mounted sub or in permanent install applications. It works well for a wide range of full-range needs for fixed or portable use.