It's the owners of the Sport that got screwed when that model introduced a standard powered liftgate on MY2012s and later. To lighten the weight of the rear door for the lifting mechanism, Land Rover eliminated the opening upper window, and apparently installed a much crappier (and lighter) powered sub in the new, lightweight gate. The result has been a chorus of complaints of an appalling lack of bass and non-existent low frequencies from owners of the "premium" sound system in 2012/13 Sport.. Luckily, the LR4 has undergone no such changes, the rear hatch is still the same manual type and the 825W sound system still sounds as good as it did in 2010, even though the supplier may have changed (from Harman to Meridian.)