Didn't mean at all to imply that the TWFK driver in a 3003i and a SM1 was the same unit, but just had similar properties. The range of headphones that use it for mids/highs is legion - and they all have their pecularities. Like a cook that starts with a common cut of beef, what he does with it (spices, heat, sides) makes it different to the taste than what the next cook would create. There was a bit of a row earlier where it was proposed that the SM1 was a single armature can that was being fed a split signal from a crossover. Your chart reflects the opposing view - that we have a flavor of TWFK inside. And as such, considering the high cost of the dual driver, the SM1 could be considered a value at its current pricing.
That said, in the spirit of adding something to the above chart - you still show the TF10 as being in production. If I was supposed to PM that to you, I apologize.
Edited by Ivabign - 4/25/13 at 2:04pm