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Spec drill · Driver size

ATH-R70xa vs Momentum 4 Wireless

A side-by-side readout for driver size.

Audio-Technica · ATH-R70xa
45mm
▲ Lead
Sennheiser · Momentum 4 Wireless
42mm
VerdictATH-R70xa wins on driver size.
Context

Understanding driver size

Driver size is a numeric spec measured in mm. On this metric, higher values are generally better, but returns diminish past category-typical thresholds — going from a low value to a mid value usually matters far more than going from a mid value to a high one. When comparing two products, focus on the percentage gap rather than the raw delta: a 200-unit lead means something very different at the low end of the range than at the high end. Pay attention to the unit, too — manufacturers sometimes quote peak or burst figures that are not sustained in real-world use. Cross-check the published number against independent measurements where possible, especially for performance and battery claims. Finally, remember that a single spec rarely tells the whole story; the Mars Score weighs driver size together with the rest of the spec sheet so one outlier doesn't distort the verdict.

This matchupATH-R70xa's 45mm is roughly 7% higher than Momentum 4 Wireless's 42mm (a 3mm gap). Whether that gap is noticeable depends on workload — small percentage gaps rarely change day-to-day experience, while gaps of 20% or more usually do.

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Other specs on this comparison

See the full Auriculares category for all products ranked by Mars Score.