yes, we could separate them into 25 categories if we wanted. but again in the interest of getting back to basics, I wonder if 2 wouldn't do it. Those that are damped by the cup (PS,GS) and those that aren't (RS, SR). Dead and alive if you will. Without the negative connotation of dead of the positive of alive. Let's assume both are valid ways to deliver grado goodness.
Can't agree - sorry. Firstly I can't agree because of the whole "damped by the cup and not" thing (both based on objective measurements and subjective listening - I find that most discussion about "damping" tend to go the way of catch-all anyways), and secondly because the SR and RS are quite different. PS-500 are reportedly different still (from everything; you'd have to ask someone who has one of the 1000 series cans as the PS-500 for more specifics though). You could sell me on the SR-60 through SR-225 (or 325) being relatively similar, and with higher-up models being improvements as you move up. The RS line being a different presentation to those, and the other three standing apart on their own. But trying to condense everything from the SR to the RS-1 into one box, and the GSK, PS-500, and PSK into another box is just too over-generalized. It doesn't recognize the relative diversity of the Grado line-up, and I think in part is responsible for a lot of the general confusion that new Grado customers are faced with (where you get the "no they're all a ripoff, the SR-60 is the same headphone, it's the same!" rantings).
Really, I'm not sure what the recent fascination with trying to over-generalize and categorize *everything* is (and I know you're probably take a broadside where you don't deserve it - I know we've chatted in the past and I have a rough idea of where you're coming from), but I think it really needs to end. It doesn't solve anything for anyone, and at the worst it may botch up someone's quest for a new headphone.