The 4070 is a monitor so it has some similarities with the SR-X lineup, slight forward tilt, glorious midrange and a bit light on the bass bloom even if it extends very deep. They are an amazing design since the only indication of their closed nature is a slight thickening of the upper midrange. Comfort is an issues though since they are massive (650gr ) and get very hot around the ears after a while, even up here in the frozen north. The earliest examples didn't travel freely on the hinges so they won't fit everybody but Stax fixed that back in 2002.