I doubt just one resistor would change the whole thing into pros, but as I said I'm no professional. Still some investigation into pros internals wouldn't hurt, would be awesome if you could do that. Resistors are color coded so you can visually determine the resistance. But to be clear even with my modification enhanced version won't blow anybody's mind, but will be less terrible
I guess there's a possibility they used a more sophisticated circuit (than a single resistor) in the pros and it really changes the sound, but I wouldn't hold my breath.
OK, so I only removed the foam on both drivers to start with. That small operation actually changed the whole sound signature pretty dramatically. Much less boomy bass, More air, much wider soundstage and clearer, but a little harsh, highs.
I must say that I'm pretty amazed that removing two small pieces of foam can make such a difference. Haven't experienced this big difference by modding since I first started with my t50rp project.
Edit: while this operation might not have turned them into the pro version it sure have made them much more enjoyable than before.
I'm also very interested in the value of the resistors in the pro version.
Edited by peter123 - 2/4/14 at 10:05am