After long time experiment with modding from BMF ver to Rp2 840 ver and my own customization, my pair just sound decent, nothing special. I let some of my friends hear it who is also into headphone hobby and it fail everytime to impress them. I don't know what's wrong? I'm using it with the Millet Starving Student which Smeggy also have and i think it's good enough. I opened my pairs a couple of time reading carefully the modding tutorial and see nothing wrong about it. In fact i have lost my confidence, now i even don't beleive the t50rp modded can compete with the HD650. May be there's something wrong with my equipment or my headphone or my ears, my friend we soon send me his t50rp, i will see how does it sound compare to mine.
My guess is you need more amp. I drive mine (pretty much a BMF V6.3 mod) with a Ming Da tube amp and and they sound very good.
The T50 RPs are 50 ohm cans and require an amp with lots of power to drive them properly.
Edited by BmWr75 - 2/6/12 at 3:31pm