What racquet are you using now?
If you want more power you can loosen your strings or switch to a racquet with
a) a larger head. Michael Chang, the quintessential retriever, used a Prince Graphite Classic with a 107 square inch head.
b) a more open string pattern. Jennifer Capriati's new racquet, the Prince Tour Diablo, has a 18 mains and 16 crosses. By contrast, the Dunlop 200G (and some others) have 20 mains and 18 crosses.
c) a heavier frame. Pete Sampras' Wilson ProStaff was weighted with lead tape at 6 and 9 o'clock so that it weighed about 14 ounces.
d) more weight in the head, but be careful -- according to racquetresearch.com (and my experience), head-heavy racquets put a big strain on your elbow, wrist and shoulder.
I want your rackets how many do you have
I love your racket I just bought 4 new wilson ncode 6's, but I played with by buddies dunlop revolution xl. I need this racket how many do you have and how much do you want for them?