Stax's first wireless headphones are Sony XM5 rivals with monster battery life - What Hi-Fi?

Stax switches from electrostatic headphones to something more affordable

Japanese brand Stax invented the electrostatic overears (aka 'earspeakers'), but now it has launched its first wireless and more affordable pair of headphones. The Spirit S3 still aren't exactly chea… [+1598 chars]

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