Each axis spans the range the 114 studio monitors in the catalog actually cover, so equal distance means equal difference — and for cone area and the two frequencies, which are read as ratios, equal distance means equal ratio. The dashed inner ring is where the scale starts, not zero. Ranked within a class because a bookshelf measured against floorstanders is feeble on every axis for the single reason that it is a bookshelf. Cone area is summed from the drive units — no maker publishes it. Bass and treble reach are quoted to different tolerances and only 56% of the catalog says which, so read those two axes as approximate. Not shown: Sensitivity, Easy load — the maker publishes no figure.