Originally Posted by KG Jag
The Grado sound signture is generally used to describe the SR line, That's where you get the sitting on stage with band slam and wall of sound. Those things are not part of the Grado RS line sound signature.
Sorry, but I reluctantly disagree with this. The only Grados that severely deviate from Grado sound are the GS-1000's and perhaps the PS-1000's (haven't heard these) - and the HP-1000's. The essential difference in all the rest: going from SR to RS and PS-500's (and HF-1's, HF-2's) are more refinement, less harshness, and in most cases - better and deeper bass. Generally speaking, the PS-500/HF-2's are at the same level, with RS-1's a bit faster with more detail, but the PS-500/HF-2's having a fuller sound with much better/deeper bass.
Grado has tricked out the SR line compared to back in the day, in that they all had bowls except the SR-60. You could literally hear another 1/2 octave or so of bass added each time as you moved up from SR-60 to 80 to 125, etc. Those differences are not as apparent now with the flat pads in use up to the 125, but if you were to put bowls on each, that's what you'd notice as the difference - more bass and a bit more refinement (less hot harshness) as you move up the line, but all sounding extremely similar.
The pads mean a lot on every headphone - perhaps more so on Grados, re: flat pads vs. bowls vs. G-bowls. Then the other distinction is the cups in use - plastic, wood, metal and the depth and weight of the cups.