Racquet throat/beam size/width does matter! The thinner the beam the less power. The wider the beam the more power. Beginners need a wider beam for ‘some extra power’right of the rack!!! The experienced player needs less power and a usually thinner beam, since theirswing speeds are fast or slow….what ever they want and need they can get from their swing speed.
Beginner players need a lighter racquet to go along with the wider beam; light means anything 8.5 ounces to 9.8 or so. Average weight and higher weight is considered to be 10.6 ounces to 11.3 and even sometimes higher.