KS8 2 x 21" self-powered subwoofer with IPAL® technology KS8 is a compact, self-powered, weather resistant exceptional peak output of 148 dB SPL. KS8 including a powerful amplifier module, a differential latency” designed high-efficiency transducers. The IPAL® technology allows to correct the intrinsic uncertainties of the acoustical system in real time for state of the art performances. System feedback correction based on a differential pressure control method. The DSP (microseconds) feedback “analog type” feedback approach with the flexibility of a DSP core. The KS8 subwoofers are also integrated in the simulation software EASE Focus to give endless possibilities whatever the venue will require.