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<p>part of the disc is around 65&nbsp;m/s. However, improvements can still be obtained using multiple laser pickups as demonstrated by the <a href="page.php?w=Kenwood_Electronics">Kenwood</a> TrueX 72× which uses seven laser beams and a rotation speed of approximately 10×.</p>

<p>The first 12× drive was released in late 1996. Above 12× speed, there are problems with vibration and heat. CAV drives give speeds up to 30× at the outer edge of the disc with the same rotational speed as a standard (<a href="page.php?w=constant_linear_velocity">constant linear velocity</a>,</p><p>
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