Fohhn's has announced the launch of the German pro audio manufacturer's new active PS-9 subwoofer. Using Fohhn's patented DPC (Differential Pressure Control) technology, the PS-9 combines an innovative electronically controlled 21-inch speaker with an integrated 8500 watt (peak power) Class D DSP amplifier. The speaker has an excursion of 60 mm and an impedance of 0.5 ohms, generating a power output equivalent to four high-powered 18-inch woofers. The speaker membrane excursion is permanently controlled by the DPC technology. This generates extremely high pressure levels and produces a tight, controlled bass response, making the PS-9 suitable for larger venues and stadiums requiring higher levels of bass. The unit's high-quality wooden housing is finished with a durable polyurea coating to withstand daily wear and tear. Equipped with state-of the art DSP processors, the PS-9 can be operated and controlled via the Fohhn Net network. The subwoofer can be teamed with a range of other Fohhn speakers including the new PT-8 compact line array system. The PS-9 is expected to be available during summer 2009. The Fohhn PS-9 is distributed in the UK by Systems Workshop. Pricing to be announced.