Red - the great thing about an amp like the ppx3 is that it can competently drive BOTH high and low impedance headphones. That's specifically why I chose it - I already owned the 600s and I was already on the market for a pair of RS-1s. But many people do say the RA-1 is the best amp for Grados. I have never heard the RA-1 myself, so I can't say.
If you're looking to make a good headphone investment, the RS-1 is the way to go. You'll enjoy them forever, and if the day ever came that you had to sell them, they do retain their value on the secondary market and you won't have any problem finding another good home for them. I do recommend that you get ahold of both the bowl and flat earpads. Try them both, to me there is definitely a noticable difference between the two - and if you like one, you're probably going to hate the other.


Comment