The jbl lsr310s is a 10-inch, 200w class d powered studio subwoofer with a 27 hz low-frequency extension and a 113 db maximum peak spl. key features include a custom-designed high-excursion down-firing driver, the patented slip streamtm port, balanced xlr and trs inputs, xlr outputs, and a selectable xlf extended low-frequency setting. it also offers an 80 hz or external crossover setting and a 180o phase adjustment switch. amplifier power: 200w class d
input connectors: 2 x balanced xlr, 2 x balanced trs (1/4")
output connectors: 2 x xlr
crossover settings: 80 hz, xlf, or external
phase control: 180o phase adjustment switch.