The IS Sub 215 subwoofer provides low frequency extension for the IS series reinforcement loudspeakers down to 38 Hz. When used with an active processor, the IS Sub 215 has the characteristics necessary to smoothly crossover to the primary reinforcement cabinets. With its high maximum output level and power handling capability, the IS Sub 215 is able to support demanding low frequency applications.

The sound reinforcement subwoofer shall consist of two 15” long excursion, die cast aluminium basket, 4” voice coil, 8 ohm each, rear vented drivers, wired in parallel, mounted in an 18mm birch plywood cabinet utilizing a direct radiated, bass reflex acoustic design principle. The subwoofer shall provide a maximum sound pressure level of 135 dB at 1 meter during a 180ms sinewave burst. The sensitivity shall be 98 dB-SPL at 1 Watt at 1 meter, frequency response shall be correctable to a range of 38 Hz-200Hz, +/- 3dB. Nominal power handling shall be 1500 Watts with a maximum power level of 7000 Watts. The physical characteristics shall be 32.5” high x 17” wide x 28.5” deep with a weight of 141.1 pounds. The subwoofer shall be the Klein + Hummel IS Sub 215.