Anyone familiar with how numbers work can guess that the 600 is the lower-end model of the range, packing wireless surround sound, glasses-friendly design and customizable sound. The Stealth 700, on the other hand, comes with all of the above, plus active noise cancellation and Bluetooth as standard. Both are available to pre-order from today, but won't begin shipping until September, with the 600 setting you back $99.95/£90 and the 700 priced at $149.95/£130.

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