Wilson’s newest racquet technology is called BLX, which adds basalt fibers in the racquet frame and — when combined with proprietary frame, grommet and grip technologies — produces what Wilson calls “the perfect feel.” Basalt is a natural volcanic rock that can be used in manufacturing and made into ultrafine gold fibers that are resistant to vibrations. Basalt fibers are woven longitudinally with Wilson’s [K]arophite Black to create a composite Wilson says is the most advanced in the industry. Like noise-cancelling headphones that filter out unwanted external noise, says Wilson, basalt added to the matrix filters the unwanted extreme frequencies in the racquet. According to the company, the new BLX technology delivers cleaner feedback and better sensation — “a smoother signal reaches the hand.” Wilson player and 16-time Grand Slam champion Roger Federer will be leading the BLX endorsement parade with his new Pro Staff Six.One Tour BLX racquet. Juan Martin Del Potro, US Open winner has also switched to the