Our Verdict 
Will improve even 1080p pictures, helping stability. Well worth the money.
Improves even 1080p pictures, tightens bass, stabilises motion
Nothing at all
Reviewed on

This 2m length of an established magazine favourite, the excellent Copper-line will improve even 1080p pictures - helping stability with fast motion, in particular - and sonically it tightens bass. Well worth the money then.