Even though Prince has rolled out its new Speedport racquets, they’re not quite finished with the previous O3 line. The Ozone frames (there are three - One, Four and Seven) have O-Ports infused with a Carbon Wave Matrix. What’s that? Graphite racquets are made up of multiple layers of carbon fibers which are traditionally at the same angle. The Carbon Wave Matrix put the fibers in each individual layer in a wave pattern which better complements the other layers in the racquet. The hope is to enhance the sweet spot, which in the case of the Ozone Four, seems to have worked as playtesters almost uniformly commended it’s ample size. The good weight and balance also led to high praise in terms of maneuverability. The racquet has plenty of pop, and if you favor big, aggressive swings, lack of control over your shots could be an issue. So it’s probably better for players with more modest strokes, or those who prefer to spend most of their time at net.