Thanks ! got it. So it's just 1mm smaller........will have to ponder and experiment some more to determine if that's a significant enough difference. right on the border. But regardless, the pads you have on that perticular magnum IS significant and a great example of how seemingly minor variables actually matter. When a guy gives his 'impressions' and tone reports; these are 'bright', sibilant, bassy etc and these variable are unknown, it really is a recipe for confusion and misinformation, unintentioned as it may be. Communcation in general is fraught with misunderstandings in every area of life, headphones included........But I can say from my experiemts, the pad is a factor, especially if it's close in to the driver. really affects things, it seems to be less of a factor the further the pad is from the edge.........