JBL GSB8 - 8-Inch In-Ground Landscape Subwoofer (Green)The JBL GSB8 in ground 8 inch landscape subwoofer augments the low frequency performance of JBL GSF full range landscape speakers to provide rich, full range sound in lawn and garden areas of hospitality, corporate and retail spaces. The GSB8 focuses on fidelity, with true subwoofer extension down to 35 Hz and a steep, multiple slope lowpass filter for superior sound. Its premium grade, 100 watt subwoofer band transformer allows use in 70V 100V