These strings are manufactured in Germany and are called "Energy Pro"
They are a new very Soft Co-poly.
So I have strung one of my Powerangle rackets with a Blue 1.25 set and my Wilson Steam 99s with a Red 1.30 set.
Stringing with the "Energy Pro" is fine it has a little coil memory but doesn't kink like some, What you do notice is the string seems to stretch more when the tension is applied so this could be softer than most co-polys, The tension instructions for the string is 52-53Ibs so I have set the tension 52.5Ibs!
(This matches very well with the tension range of my Powerangle)
Playing with the Energy Pro Blue 1.25 in the Powerangle:
Wow! I have scored this string the highest in three categories, Comfort, Feel and Control, power is slightly lower than (MSV Focus hex, my baseline string) This string feels so good and gives you the confidence to control a game, so much so that I played 12 -15 consecutive drop shots and only missed one! (my playing partner was not a happy bear!)
The string holds the tension well and plays really nice, For those players who have tried Polyester and haven't liked it, I would retry using this string,This has got to be one of the best Co-Polys that I have played with for Control, Feel and Comfort.
I will update you when I have used the Wilson racket, really looking forward to this!
Playing with the Wilson Steam 99s with the Energy Pro Red 1.30
Yet again highest score for Comfort, Fell and Control,with the added bonus of a little bit more power.
This string transforms this racket into an exceptional control racket with Spin, Topspin drives and Serves kicked more with this string and the tension maintenance was good it did start to notch after 4 hrs but with this racket that would be expected!
Comments from my opponent: Definitely more kick on your drives and Serves. You were controlling the game with ball position not power, the drives and serves were pushing me back.
Update: Played another 6 hrs with the Wilson 99s and the Red 1.30 checked the strings and they are 1/3 way through the string (notching) so I will expect them to go in the next 4 hrs, so that is a total so far of about 12 Hr of singles and 4 of doubles, Which is not bad for this racket !
I would recommend both of these strings and will stock them when released by the supplier.
Update: 8-Dec-13 Red 1.30 strings just snapped today, the strings felt really good, so that's about 18hrs playing time for these strings, well worth it just for the feel and control this string gives.
Powerangle strings (Blue 1.25) still going strong showing no signs of ware,then again the Powerangle rackets are very kind to strings!
In the interest of being impartial I restrung a friends Wilson Blx with the Energy Pro 1.30 String, Now this player hates poly strings with a passion, He has now played with the string for about 4hrs and I quote " I can't believe this is a poly string, it has so much feel and the spin and power is really good!"
Update the supplier will release Energy Pro strings for sale in February 2014 (I will be first with my order!)