Donnay X-Poly 17 String Review April 26, 2016 23:01

We are slowly expanding the range of both Donnay and quality string choices available to our customers. Today we present the Donnay X-Poly 17, the first Donnay string we have been able to obtain and test, both personally and by making it available to Ing. Medri for his mechanical tests.

A gray, round string, in my opinion it performs very consistently over time without excessive tension loss in the first few hours, as happens with many strings.

Durability is probably its strong point, but the mix of power, spin, and tension retention makes the X-Poly a string that satisfies both competitors and amateurs who need power and feel with their equipment.

Here are Ing. Medri's notes:

The Donnay X-Poly is a string characterized by extra linear performance, proving the quality and consistency of the base polymer.
The static stiffness level is quite high, demonstrating the purely competitive nature of the 0.9-1.15kg/mm filament. The dynamic stiffness is medium-high but absolutely normal for a string of this "rank" and does not compromise the enjoyment of impact or the fullness of the shot.
The power level is high but can be expressed at a high RPM and provided you have good arm strength, technique, and stroke speed.
The control is excellent, also in relation to the general stability level of the filament, which is very interesting for a polyester.
Its spin potential is more than good, also due to the string's stiffness, reactivity, and surface finish.
Medium-low tensions are recommended to fully enjoy the string's characteristics; at high tensions, it would not lose effectiveness but risks making the string bed excessively stiff. Using low tensions, in addition to promoting power, ensures dynamic behavior and an impact shock level that does not jeopardize our precious joints. (18-22kg)
Very high dynamic life for a polyester filament, also thanks to the rigid and tenacious nature of the base material.
The Donnay X-Poly 1.25 is a high-value string intended for a technical and competitive audience, but also for those attentive and passionate about seeking substance and quality beyond the brand.
A purebred string, capable of offering maximum performance at high RPMs and with medium-high arm speed.
To be strung at low tensions in fullbed, but recommended for a wider audience in a hybrid combination, even with noble gut.
An excellent choice for those looking for a blend of power, control, spin, and durability in a setup that is sure not to disappoint even the most demanding palates.