Nox Quantum 12K Cobalt vs Siux Electra ST5 Pro Shadow Red 2026 Franco Stupaczuk

“The Quantum 12K Cobalt is the all-court listing of Nox's non-signature attack platform: the HR3 core in a 375 g diamond scoring power 80 with workable control 68 and fair-for-the-genre terms (comfort 66, tolerance 65). Face details beyond the 12K family designation are thin. Value 78 continues the Quantum's rational-buy positioning: AT10-adjacent character without the signature tax. Between Quantum editions the Cobalt's tuning reads a touch friendlier than the Carbon's. For advanced players who attack in waves rather than constantly, this is the Quantum to demo first.”

“Franco Stupaczuk's Shadow Red ST5 is built to attack: power 90 with control 78 is a proper first-strike profile, and the confirmed even balance at 365 g explains why it feels quicker between shots than its hitting power implies. Blocks and counters stay manageable, then the same frame turns a short lob into a finished point. The firm side is unavoidable: comfort 67 and tolerance 66 mean mishits are felt and punished. Beyond balance and weight, full spec for this colourway is unconfirmed, so try before you buy. For aggressive all-court players it is a convincing signature frame.”

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