Varlion Bourne Summum Prisma Radio

The Bourne Summum Prisma Radio pairs Varlion's hybrid diamond-and-teardrop Bourne mold with a very hard EVA core and a high, head-heavy balance, built for advanced players who want power without giving up control. Its frame is manufactured using Varlion's Radio process, which drills the impact surface before the mold is set rather than after, aimed at reducing cracking around the holes over time.
Shape
Hybrid
Balance
High
Hardness
Hard
Core
EVA
Style
All-round
Level
Advanced

About the Varlion Bourne Summum Prisma Radio

The Bourne Summum Prisma Radio takes its name from Varlion's Radio manufacturing process, in which the impact surface is drilled with its holes intact before the racket is molded, rather than punched afterward — a change Varlion designs to reduce the risk of cracks forming between holes as the racket ages. It sits on the same hybrid Bourne mold as the rest of the range, fusing the diamond-shaped Cañon head with the teardrop-outlined Avant, and carries the Summum family's extended handle for two-handed backhands.

Its very hard EVA core and high, head-heavy balance are built to hit hard, but the specification records the Prisma Radio's playing style as all-round rather than pure power — a blend of offensive strength and defensive control rather than a racket built purely to finish points early. That distinguishes it from its closest sibling, the Prisma Airflow, which leans further toward aggressive, aerial power at the expense of that same defensive margin.

The very hard core and high balance together still ask for a confident, well-timed swing, which is why the Prisma Radio is built for advanced players rather than players newer to the game. Anyone wanting the same hybrid shape with a softer touch and an easier entry point should look toward the Summum Carbon Black elsewhere in the Bourne range.

Questions about the Varlion Bourne Summum Prisma Radio

Who should be playing the Bourne Summum Prisma Radio?

Advanced players who want a racket that hits hard without losing defensive control; its very hard core and high balance both ask for a confident, well-timed swing.

What kind of core does the Bourne Summum Prisma Radio have?

A very hard EVA core. EVA is a dense, closed-cell foam, and this racket uses one of the firmer versions Varlion makes, which drives the ball fast off the face but narrows the forgiving zone compared with a softer EVA core — a trade suited to players who already strike the ball cleanly.

Is the Bourne Summum Prisma Radio suitable for beginners?

No. The very hard core and high, head-heavy balance both reward an established, well-timed swing rather than forgive a developing one; a beginner is better served by a softer, lower-balance racket.

What does Radio actually refer to on this racket?

Varlion's Radio process, which drills the frame's impact holes before the racket is molded rather than afterward, intended to reduce the risk of cracking around the holes as the racket wears in.

How does the Prisma Radio compare with the Prisma Airflow?

Both use the same hybrid Bourne mold and a hard-hitting build, but the Radio is recorded as an all-round racket that keeps defensive control alongside its power, while the Airflow leans further toward pure aggression and aerial pace.

Is the Bourne Summum Prisma Radio better for power or control?

Both, by design — it is built as an all-round racket, hitting hard off its very hard core and high balance while retaining enough control for defensive play, rather than trading one for the other the way a pure power racket does.

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