Active Bass Cabinet. 18″ High Excursion Driver. Class D Amplifer. M20 Speaker Pole Socket. Two Aluminium HandlesPower: 1200W RMS Response: 33Hz – 100Hz SPL: 137dB Dimensions: 555 x 572 x 666mm Weight: 44.5Kg. The FBT Subline 118SA is an extremely compact bass-reflex design subwoofer. The Subline 118SA features 0-70″ birch plywood construction covered in a scratch resistant black paint with two aluminium carrying handles; an M20 top mounted stand adapter allows satellite speakers to mounted above the subwoofer cab. The sub features a 18″ high excursion woofer with 3″ voice coil. The cabinet provides a digital signal processor with 6 pre-sets- 4 equalization with 2 LPF crossover settings- cardioid configuration. A high end performance criteria includes a frequency response of 33Hz to 100Hz- max. SPL of 137dB peak and a powerful 1200W RMS Class D power amplifier with switch mode power supply. The control panel features stereo XLR in/out- level- EQ pre-sets- 6 steps delay- phase reversal switch 0ø-180ø and 3 status led indicators.. Active Subwoofer-18″ Active Subwoofer-18″ Subwoofer-18″ Bass Speaker-Subwoofer-FBT Subline