Comments: Racquet - Pro Staff Six.One V13, 18X20 Tension: 49 lbs Main, 47 lbs Cross. I came across this brand of Kirschbaum strings while looking to refill my 17 gauge Max Power Rough stock (KMPR). Before KMPR I rotated between RPM Blast and Luxilon ALU Power Rough, but that was when I played mostly D3 college singles/Mens Open tournaments. I started playing competitive doubles/mixed doubles leagues in Las Vegas as a self-rated 4.5, 100 lbs heavier since college and found out my racquet acceleration wasn't nearly what it used to be. As phenomenal as KMPR 17 gauge has been the last 2 years, in my opinion, Kirschbaum Pro Line Evolution (KPLE) is even better. Here's how they compare:
Max Power Rough/Pro Line Evolution Metrics (1-10):
Control = 9/9
Durability = 9/TBD
Playability Duration = 9.5/TBD
Power = 4/6.5
Spin = 8.8/9.2
Touch = 9.1/9.4
I excluded feel because I've been fortunate enough to have be taught solid technique, which has kept my injuries to a minimum; however, KPLE does feel similarly soft like KMPR, both of which feel much softer than KMP. Pro Line Evolution isn't just a phenomenal doubles string, its the best I've ever played with over nearly 30 years. Control is very good, I need to play more singles to get a more accurate idea of what they're fully capable of. Power is where Evolution stands out the most. It plays with a significant power boost over both KMP strings, especially when blocking returns against big servers. Strike your groundstrokes/counter-punches in front and the ball will fly, use your wrist(s) well and those shots become high percentage. Spin is excellent, though not quite as much as RPM blast. However, the spin these strings generate becomes more effective when other metrics are factored in- as spin with heavy bite and spin with sharp angles and heavy bite are more difficult to counter than spin by itself. For example, my wide slice and topspin serves have already begun to improve with only 3 days of hitting as I'm writing this. Lastly, the touch is unreal. When coming in from the baseline the 1st volley is so much easier which these strings. No mans land volleys, floaters or loopers above the shoulders, off-speed slices or heavy topspin at your ankles, these strings don't care! Nail your footwork/positioning and these strings instantly double your volley touch.
From: Andrew, Las Vegas, NV 10/19/21

Comments: I'm a 4.0 level player with a one handed backhand and an Eastern forehand grip. I have played full polyester for over 15 years. I've used Kirschbaum Pro Line Evolution the last six years and absolutely love them. Great pop, spin potential, and amazing slices. I'm not a pure baseliner pounding huge topspin shots, but for my style of play I couldn't be happier with these strings. Strings don't move and barely show signs of wear. If you like polyester strings and are looking for all around awesome strings, then the Pro Line Evolution is your string. Can't recommend enough.
From:Danny, 4/27/21

Comments: Basically a more lively Pro Line ll. Provides a really nice comfortable feel for a poly and I felt that it checked all the boxes for me. I was able to string it in the mid 50's with no arm problems. I am a 5.0 and I strung it up in my Pure Drive.
From:Austin, 12/24/18

Comments: I'm searching for a powerful, and arm friendly poly string. I bought this string after read this string's review at a social web site in Korea. This string is very easy to string and is a good string for someone who is looking for good control with a comfortable feel. No pain on my arm after playing a 4 hour game. I think this string has enormous return energy.
From:NAMGYU YOON, 11/20/18

Comments: I have just started stringing racquets, so am trying out various strings and tensions in a couple of different racquets I have. Since this was on sale, and I read such nice reviews for it, I decided to try it in 2 racquets- a Yonex Ezone AI 98 and Babolat Pure Drive. From a stringing point of view, I love it: smooth, slick, 17g... what's not to like from a stringing point of view. But playability... that's the key. I have enjoyed it in my Pure Drive and my wife has had good success so far with the Yonex. In both cases, there is the ability to get power, but mostly it's the feel that I enjoy. It's surprisingly comfortable string, and it seems to allow you to lock into good control and get good spin. I've also had nice movement on my serves. Surprising how much spin and ball movement I'm getting from a rounded string. I may use it as my "stick" poly for people who want a restring, so far I'm agreeing that it's a very good all around string that is easy on the arm/shoulder (which I am loving).
From:David, 10/26/18

Comments: Read a lot about it. Tried it in quite a flexible frame, the Head Prestige Tour 660. Felt good. No pain after a game or the day after. Quite unusual for a co-poly, since I have a very sensitive arm. I hybrid this string with a Kirschbaum synthetic gut as a cross, maybe I will try it as a main.
From:Reuven Wittenberg, 10/2/18

Comments: Just an update -- I use a Donnay which is a more arm friendly racquet but some polys still bother me. This one has been above average comfort for a poly without feeling soft/mushy. I've had it in for 15 hours about and it's going just fine.
From:Zebas, 2/17/18

Comments: I used it right after trying Weiss CANNON Blue Rock N Power, which I liked a lot. For that string you are supposed to string the tension lower. I usually string polys in the mid 40's in my Donnay. I tried it strung low with this one but the balls have been flying a bit. I want to try it again however. It has a nice feel, good spin. Give it a go!
From:Zebas, 2/14/18

Comments: Soft and supple. I never thought I'd use this to describe a tennis string, but it fits. If you're looking for an incredibly soft string that gives the control and spin of a co-poly, this is the string to get.
From:Eric, 10/20/17

Comments: I tried a full bed of this in a Yonex DR100+ at 52 lbs. An incredibly pleasant surprise. It has a great feel and and I am able to deliver controlled power with a great feel at impact. The most pleasant surprise is how much top spin this string generates for a smooth string. I can hit a big heavy ball with this string and it is easy on my arm. I have been playing shaped strings like Solinco Revolution, Gamma Moto, and RPM Blast along with Volkyl Cyclone and this is now my favorite.
From:Don, 10/9/17

Comments: This is the most wonderful 17 gauge I have ever found. Great durability, very good feel, awesome control, and good spin. All strung at 57 lbs on the flexible Volkl Organix 10 Mid racquet.
From:Philippe, 6/29/17

Comments: The hype in this forum about this string piqued my curiosity so I decided to try it out on 2 of my frames (Babolat Pure Strike 18x20). I am not impressed by it. I strung at 53 lbs. It's a pretty comfortable string with access to power and reasonable spin. If you want to combine both power and spin then look for something like Cyclone Tour by Volkl. You will not be disappointed even at its cost.
From:Gino, 6/16

Comments: I have tested around 50 strings and this is the best string I've played with. Strung it up at 54 lbs in my VCORE 310. Wow!
From:Enzo, 10/15

Comments: Strung it up at 49/47 lbs as a full bed in my Prince Tour 95. More or less, it's good string but nothing more than good. I like the crispy feel. Good level of control and durability. I see a lot of opinions that this string has impressive spin-potential. Maybe in racquets with more open string pattern but for this "flat" and absolutely control-oriented Prince, it is nothing more than average spin. So I still prefer gear-shaped, thin (17/18) strings like Kirschbaum Spiky Shark or Volkl V-Torque.
From:Przemys, 11/14

Comments: Strung it up at 57 lbs full bed on my BLX 6.1 95 and was impressed straight away by its ball pocketing qualities. It is a softer feeling poly with a nice blend of power and control. Access to spin is good thanks to its rather slippery surface. Two things which could improve though is durability and tension maintenance. Got around 1.5 months of hard hitting until it broke. I have never broken polys until I started using Kirschbaum strings (last 3 Kirschbaums all broke) but maybe because I'm also hitting harder.
From:Sean, 4/14

Comments: This is a great string. It plays pretty soft and has very nice power for a poly. I'm on my second reel right now and will likely get another when I run out.
From:Anon, 12/13

Comments: This is my go to poly right now and I love it. Tried a few sets and soon after bought a reel. Right now I'm using it as a cross with VS gut mains but have strung it in a full bed as well. This is a fairly soft string with great power and very good spin potential for a smooth poly. This string lasts longer than most polys for me which is also a bonus. I would highly recommend people giving this a try.
From:Anon, 8/13

Comments: I bought a few sets of this string and really liked it. I'm now thinking about ordering a reel! It feels nice, is very soft, has above average power for a poly and it offers great access to spin. I used it both in a full bed and with gut mains and Pro-Line Evolution as a cross. It really felt fantastic with both setups. It's nice and smooth for gut and allows the gut mains to move freely for good snap back. I would recommend this string to anyone! Both baseliners and all-court players would benefit from this string.
From:Anon, 4/13

Comments: Once I strung the mains on my racket with this string, I knew I would love it. It is a very soft Poly. For me the string felt the best on my serve. I strung it at 58lbs, normally I string a multi on the cross, but a full set of this feels the best for me! Definitely recommend this string to all players!
From:Kevin, 2/13

Comments: I'm a 4.0 level player that likes the control and spin of a poly, but needs a little more power. I love this string! I string a full bed of this at 50/48 lbs in my Head Youtek Prestige MP and I've found it to provide great ball pocketing, touch and control. It plays very much like Pro Line II, but with a little extra pop. Like other reviewers have mentioned, it is great at the net and for touch shots. It's also pretty easy on the arm. I have shoulder problems and this string feels plush compared to the shaped and stiffer polys I've played with in the past. I highly recommend this to fans of PL2 (or any other soft poly), who are looking to add a little extra bit of power to their game.
From:Josh, 1/13

Comments: This string is very good at net. It is soft and holds the ball long enough time for the net player to place the ball. It's not very good for baseliners. You should use a hybrid with Luxilon if you play doubles.
From:David, 12/12

Comments: At first these strings felt great! But after a while, the strings felt not as good. My frienduses a Youtek Prestige Pro (at 57lbs) and I use a Youtek Prestige Mid (at 55lbs) and the stringsfelt great. Good amount of spin and power and control. But after a few weeks with the smalltension loss, the strings just felt ehh. It didn't feel special at all at that point. We both agreedthat Kirschbaum Pro Line II Black 18 gauge is one of the best strings out there. Honestly, ProLine Evolution feels closer to a 16 gauge. I prefer thinner strings.
From:Duy, 6/12

Comments: These strings are by far the best co-polys I've tried, shapedor not (and I've tried A LOT)! These really do seem to retain tension better than other co-polys, so Iguess the factory pre-stretching really does yield benefit! The key here is to string these at low (I really mean LOW) tension. Donot make the mistake of stringing these at only 1-2 lbs lower than (orsame as) multi, thinking it'll take a huge dip in tension, because itwill NOT, and you end up with a stringbed that's basically a flatplastic board that's unplayable. But if you string it at--or close to--the minimum tension range for your racquet, HELLO SPIN CITY! Also,these strings hardly move at all, even when I hit the balls HARD for afull hour with gobs of topspin (and I hit with the sole purpose ofkilling the fuzz off the ball!). An absolute German tech wonder!!!
From:Dan, 6/12
NTRP Rating: 4.0

Comments: I really wanted to like it as I am a fan of Kirschbaum, but my control, spin production and accuracy went out the window with this. I played (and lost) one competitive match that I would have won handily any other day but my shots were flying over the baseline and I couldn't get any "dip" generation to land them in. Going back to the ultimate string which is Pro Line II. I never write reviews so mark my words on this one, I felt compelled to get the word out.
From:Anon, 5/12

Comments: Worst string I've ever put in a tennis racket. Put this inmy Head IG Prestige Pro at 54 lbs. I had Solinco Tour Bite 17 in itbefore this, and it was like playing with two different rackets. Got nospin and absolutely no control whatsoever. I'm a 4.0, borderline 4.5player whose main strength is consistency, and I was spraying routineforehands and backhands 5,6,7 feet long. Completely lost my serve dueto the of the lack of spin. Not only do they not play well, they don'teven feel good. I saw the reviews that this string would break in andplay and feel better, but I've played 5 competitive matches with thesestrings and I haven't enjoyed one point with them, and the feel hasn'tgotten any better. There is a weird vibration, which I think led toshoulder pain. I'm 20 years old and I've been playing for 8 years, andI've never once had shoulder pain before.
From:Geoff, 5/12

Comments: A step back. Not as good as previous releases. This edition does not hold characteristics as older versions used to.
From:Bedrock, 5/12

Comments: String is very, very nice but maybe a month of play and theyalready broke I'm happy I got the triple pack version. Well beside fromthat I believe this is a good string and people reading my feedbackshould test this string out.
From:Frank, 2/12

Comments: In response to Michael, after about a month of play these strings are too lively when fresh. After they really settle in (5 or so hours) you have more of the pocketing and control. I find this to be the same case with Pro Line 2. This coincides with Michael's test report. They are really very similar only this string will retain more performance because its lighter and is the latest Pro Line co-poly tech from Kirschbaum. Really impressed. It is like a cool blue color. It rocks.
From:Matt, 12/11

Comments: I put these bad boys in my Volkl Power Bridge 10 Mid at 45 lbs and all I can say is wow. There is nice power, nice spin, and nice control.
From:Bob, 12/11

Comments: I have been playing with Pro Line 17 (red) and liked it. Began to demo racquets so at the same time tried new strings as was suggested by Tennis Warehouse. As usual they knew best. The Evolution 17(blue) was just as advertised. It added power and additional spin without losing control. It added a little MPH and action on the serve and still gave me the feel for lobs and touch volleys. From the first hit it was great! I will now use the Evolution 17 and not buy a new racquet until spring. I don't break strings so the 17 should perform just fine. I am looking forward to see how it performs in the heat of the Texas summer! I will admit the blue strings do help to focus between points!
From:Andrew 12/11

Comments: This string is just great. Great spin without the hard and harsh feeling of most textured polys. Holds up and performs just like Pro Line 2 only a little more explosive in the power department. It is pre-stretched for better tension holding (like all Kirschbaum strings) and it is a co-poly which makes it more comfortable. It represents the latest technology. For a players racquet (I use a Tecnifibre TFight 325), the tension is best around 50 to 53 lbs. Also I think the blue color is rad.
From:Matt, 11/11

Comments: I've been playing with Proline II 1.25 strings for roughly 8 months. I love the control you get off of the bed and that I can swing out fully and keep the ball in. So I tried the Evolution version of the string and they are similar in some ways. They are a little more lively with a touch more spin. The extra power was welcome on my forehand and serve, but I felt that I had to hold back on my forehand to keep the ball in. I might be able to adjust to the string, I'll give it a few more tries. But side by side against the Proline II (black 1.25), I was striking the ball much better. I should also point out that while both racquets were strung the same, the Evolution racquet was fresh, while the Pro Line II black was going on 12 hours of play (still had more control and I could swing out more). Proline II black is still my favorite!
From:Michael, 11/11