Updated measurements are much closer to how I perceive them. I think the 429 is the best of the bunch, but that one is even tougher to get a seal because of how little they clamp and the paper mache piss poor pleather and stiff pads. The 439 have a reasonable soundstage and decent tonal balance but heavy grain and lack of clarity lets them down. For anyone interested in cheap gear, these at $45 just get portapros or if closed is a must then Sony ZX701 is like $40 on Amazon and that thing sounds amazing for the humble price.
