I'd say the clamping force is a bit lighter. The big difference is however that the pads and headphone don't have the "roll inwards towards the nose"-feeling. With LCD-2 r2 and LCD-3, the fluffier pads tend to create an inward rotation... the modded HE-5 doesn't have that problem. The HD800 is conciderably lighter and also "aerier". They convey the feeling of not wearing headphones. As good as the Code-X might be, it's close... but no cigar.
10/22/13 at 7:18am