Challenger – At the upcoming Warsaw show, Lithuania's Silent Pound will bow their 88dB Challenger. Its partially open-backed 36x35x124cm WxDxH 60kg steel hull contains computer-optimized perf rear-loading for the midrange drivers coupled to a short tweeter horn. Safety glass on the plinth allows a glance at the crossover whilst the rear grill can be removed to see the open-baffle woofer magnets. Numerous finish options from the RAL palette allow customization options. The 'free room treatment' benefits of dipole bass apply even into the vocal band due to strategic cardioid loading of the rear wave. This looks like a clever wrinkle on standard open-baffle types.