Head to head
Double AR 666 (1.30) vs Prince Topspin Plus 16
They split the measurements 3–3. The widest gap is string friction, where 666 (1.30) is 25 percentile points ahead. Every figure is a testing-machine result at a fixed reference tension.
Measured, side by side
Bars are percentile against all 791 strings, and the marked side is the one that measures better, which is not always the one you want. A firmer bed is worse for your elbow and better for your control, and no measurement knows which of those you came for.
Which one wins, by problem
Each string's standing on the site's rankings, out of every measured string in the database. This is where a comparison stops being arithmetic and starts being a decision.
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666 (1.30)166th
Topspin Plus 16236th
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666 (1.30)204th
Topspin Plus 16210th
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666 (1.30)545th
Topspin Plus 16541st
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666 (1.30)189th
Topspin Plus 16168th
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666 (1.30)248th
Topspin Plus 16147th
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666 (1.30)378th
Topspin Plus 16385th
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666 (1.30)206th
Topspin Plus 16177th
Swapping between them: what tension?
Bed stiffness is published at one reference tension, so the only honest conversion is to scale it. These are starting points from 52 lb, not prescriptions. The calculator takes your own tension.
Coming from 666 (1.30) at 52 lb
String Topspin Plus 16 at 48.6 lb 22.0 kg
Coming from Topspin Plus 16 at 52 lb
String 666 (1.30) at 55.2 lb 25.0 kg
Hybrid: what if you used both?
Estimated, not measured. No hybrid combination has been tested as a bed. These figures are the two strings' own lab measurements weighted by how much of the bed each one actually is. Treat them as a guide to which way a pairing moves, never as lab data.
666 (1.30) mains / Topspin Plus 16 crosses
Topspin Plus 16 mains / 666 (1.30) crosses
Which goes dead first?
Estimated from tension loss, which is the only thing the database measures about ageing. This is when the bed stops playing the way you strung it, not when the string breaks.
666 (1.30)
~30 hours of play
Topspin Plus 16
~34 hours of play
Both strings in full
| String | Gauge | Price | Stiff lb/in | Loss % | Power % | Spin | Bite COF | Friction COF |
|---|---|---|---|---|---|---|---|---|
| Double AR 666 (1.30) Nylon | — | find | 162 | 24 | 93 | 5.8 | 0.491 | 0.085 |
| Prince Topspin Plus 16 Nylon | 16 | find | 166 | 21 | 93 | 5.3 | 0.512 | 0.097 |
Add a third string 666 (1.30) in full Topspin Plus 16 in full