Active Subwoofer. 15″ Woofer. 4 DSP Pre-Sets. 1200W RMS Class D Power Amplifier. Birch Plywood Cabinet. M20 Stand Pole MountPower: 1200W Frequency Response: 42Hz-120Hz SPL: 135dB Dimensions: 455 x 586 x 570mm Weight: 30Kg. 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 optional 100mm/3-93″ transport wheels. The control panel provides two channels with stereo combo XLR/jack in-outs- stereo XLR HP filter outs- level control- preset switch- 0ø/180ø phase reversal switch- prt-lmt led indicators.. subwoofer speaker-bass speaker-active subwoofer-fbt speaker