PB17 Ultra R|Evolution - High-Performance Running Shoes for Men & Women | Lightweight & Breathable for Marathon, Training & Gym Workouts

A quantum leap forward in design and performance with multiple groundbreaking innovations - the most formidable and sophisticated ported subwoofer ever developed.

All-new 17-inch driver with first-ever dual 8-inch voice coils. The most powerful amplifier ever deployed in a consumer subwoofer with unprecedented dual mono-block design married to the extreme intelligence of a 295MHz DSP. All managed by the most sophisticated subwoofer control app, now with auto EQ room correction (available soon via over-the-air update).