Active Subwoofer. 18″ Woofer. 4 DSP Pre-Sets. 1200W RMS Class D Power Amplifier. Birch Plywood Cabinet. M20 Stand Pole MountPower: 1200W Frequency Response: 38Hz-120Hz SPL: 136dB Dimensions: 510 x 655 x 630mm Weight: 34Kg. The FBT X-SUB 118SA – 1 x 18″ bass-reflex design subwoofer- is the perfect low frequency extension and the ideal companion for the FBT X-LITE and FBT X-PRO series. The FBT X-SUB 118SA provides the following performance criteria: frequency response of 38Hz to 120Hz @ -6dB- maximum SPL of 136 dB peak- 1200W Class D amplifier. The FBT X-SUB 118SA provides a DSP processor with 4 presets (2 responses with 2 different cut-off frequencies). The FBT X-SUB 118SA feature 0-70″ 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