Originally Posted by PED
Not really sure that it's less powerful than the 50's but I find that between 41 and 45 lbs full poly in the 99S (depending on temp) and it's great: plenty of power and control.
I tried 35 lb (Head Sonic Pro 17) in the 99S and I couldnt do much with it. I know that racquets are not "rocket launchers" but people are.....but holy smokes I could hardly keep the balls from flying. And, the strings moved from the first hit and didnt return. I really really wanted to like the low tension, as the frame played pillow soft with easy easy power.
Maybe another test at slightly higher tension?