FBT X-SUB 115SA 1200W Processed Compact Bass Reflex Active Subwoofer - 15"The FBT X SUB 115SA provides the following performance criteria: frequency response of 42Hz to 120Hz @ 6dB, maximum SPL of 135 dB peak, 1200W Class D amplifier. The FBT X SUB 115SA provides a DSP processor with 4 presets (2 responses with 2 different cut off frequencies). The FBT X SUB 115SA feature 0,59\" birch plywood construction with scratch resistant black paint finish with M20 top mounted stand adapter, two FBT design aluminium handles and four