The XPRS115S is the perfect complement to enhance the tight and powerful low frequencies. On top of the slanted baffle enclosure with 15-inch neodymium drivers, this single 15-inch subwoofer features a versatile Crossover switch so you can easily adjust the low pass filter cut-off at various stages between 80 Hz and 150 Hz. *The XPRS115S is sold as a single subwoofer.The XPRS115S is the perfect match for enhancing tight and powerful low frequencies. Atop a sloped baffle enclosure with 15-inch neodymium drivers, this unique 15-inch subwoofer features a versatile crossover switch so you can easily adjust the multi-stage low-pass filter cutoff. between 80 Hz and 150 Hz. *XPRS115S is sold as a single subwoofer..PZA MORE SPECS