This is from what I gather, please take with a grain of salt, if you can afford to do some experimenting, I would recommend it, esp with cheap strings say around RM 40 or less.
Some people would comment that 45-48 tension is too low, they can generate power, they need control, if you are a FLAT hitter I can certainly understand your point of view, but if you are a topspin hitter, not necessary a Nadal clone, BUT your shots do dip, you will most certainly appreciate low tension rackets, I have only tried this on a 16x19 open string pattern racket. If you have 18x20, you are more than welcome to try, I won't say its harder to impart topspin on a 18x20 racket, but if you have good technique its doable.
Yan it answer your question, it all depends on WHAT type of string you are using.
Take for example, Luxilon, this is a 1st generation poly that has wowed the ATP, it is without a shadow of a doubt the most popular poly on tour, ATP and WTA, nothing else comes close! PERIOD!
Luxilon is the only brand where professionals have to PAY for their string, unlike other brands the brands pay the players to use their product.
The current information I have on poly is this:
If you are using your scenario:
1) String Luxilon at 45lbs and play, it will play beautifully and you will have the poly effect for a much longer time, hence the strings don't die as fast expression.
2.String Luxion at 55lbs, there is a higher possibility you will be able to take HUGE FRIGGIN CUTS at the ball and it will remain in, you will bewilder your opponents, however this setup WILL NOT LAST long, I have been told depending on your NTRP, some people have reported it lasted for 15 mins, during those 15 mins they played the best tennis of their life, after that 15 mins they noticed huge deterioration of the string performance, balls that were landing 2 inches before the baseline are landing a foot out. Other have noted the strings performance deteriorated after 1 hitting session ie 45 - 55 mins. Again experiment and see what works for you.
You can certainly string at 55lbs, but make a note, how you felt you were hitting the ball,ask your hitting partner, was your ball coming at them faster, did the ball feel heavy,etc. Make a mental note, how long did this last, if you get feedback, wai boss, how come your ball not so strong leh..... attribute that to the string, then.
On a personal note, I have noticed if your string lower, esp with POLY, your spin is unbelievable, BUT I suspect you MUST have a sound technique. If you cannot maintain a 20-30 ball rally, do not waste your money on this experiment, I also believe stringing lower tension on a racket only works with a STIFF racket, if you are using a flexible racket, again I would not recommend this.
Didn't Nawin change to Prince :-O Also didn't know he was a fan of Toalson either! >:-) j/k Damn he change his gear pretty radical.....lost another Wilson kaki to evil Prince
He also does great reports on stuff
oh great... u know nawin as well..haha...he just invited me over to hit with him one of these days. yup he is ON the Prince exo3 graphite now. said it's his best racq to date. and have been using toalson like forever..haha.. yup he is also crazy abt gears. just bought a st.vincent few weekends ago. think he has more than 20 odd racquest in his collection so far and has the gamma x-es to string his own racqs. envynya... !!
anyways tx for the explanation. Will definitely giv it a try one of these days since i recently stocked up the crossfire 17 .. so will use that to experiment so pocket won't pecah. Will try it on the exo3 graphite first since got example already ..haha
another Q : on the crossfire normally it's "recommended to string lower 5lbs or on the 18gauge version 15-20% lower. How do u guys string ur crossfire/ hybird normally ?