e SW 118E - SP is an active plug-andplay subwoofer and is an ideal extension to the passive K&F speakers and the active full-range systems of the K&F SP series. With a frequency range extending as low as 30 Hz and a maximum sound pressure level of 133 dB the SW 118E - SP is equally at home as an outstanding bass system in theatres, cinemas or all-purpose halls or as a powerful and precise basic low-frequency set-up in discotheques and live clubs or as a compact P.A. High-quality self-powered systems can be assembled in parallel operation with the active SP full-range systems. When supplementing the passive K&F full-range systems the SW 118E - SP active subwoofer is driven separately. The innovative, fan-free system electronics weigh only 2.5 kg and include the digital 1 kW Class D power amplifier and an elaborate limiter section (RMS and peak limiters). Here too the system equalization, cut-off frequency and phase response are defined. Butterfly handles, flying points, M 20 adapter, castors and stacking feet with corresponding grooves are all standard equipment. The excellent performance data and simple handling of the SW 118E - SP set new standards in top class professional active subwoofers.