I just received my set of C-Pads, purchased from a Head-Fi Member who was willing to part with them.
My first observation is how challenging they were to fit to a set of Grado RS-1's. One sid fit the C-Pad beautifully -- with one moderate push, the pad snapped right in place. I used a small amount of putty, but it probably wasn't even required. The other side? Forget it. Not matter what I tried, after several hours of fiddling, I couldn't get a decent fit and no way would it snap in place. I finally just resorted to packing the interior with blue stick putty and physically wedging the driver into it enough so that it would stay in place. Very unsatisfying, but it seems to be holding up.
Next, I put them on my head and immediatley noticed the comfort. Ohhhhhh....how nice these pads feel on the ears/head!!!! Beyer has it right and, as for Grado -- what were you thinkin'! That cheopo foam rubber is simply awful -- irritating and uncomfortable. Sheesh! On a $600 headphone? Come on...
Finally, the hearing test. I was comparing my RS-1's to a set of Sony CD-3000's that I bought used from another Head-Fi member. I used a CD that I have played a bizillion times and know by heart: Gary Burton and the Berklee All-Stars (JVC digital recording).
1) At higher volume levels, the Grado bass was not only overpowering, but severly distorted (raspy) -- not so with the Sony's. I suppose it could be a problem with amplification, but both cans are rated at 32 ohms. Why would one be so prominently distorted and the other not? I was running both cans through a Yamaha RX-E200 receiver.
2) Comparitively, the sound of the Grado's is cramped, muffled, and dark (not bright). For my tastes, not as pleasant a listening experience at all.
So, my bottom line: comfort -- fantastic; sound -- way less enjoyable than the CD-3000's. As I write this note, I have the Sony's on and am thoroughly enjoying Gary Burton! The sound is clear, distinct, airy, vibrant, and pleasant. I simply don't want to take these headphones off my head...
Interestingly, I paid under approx. $300 (USED) for the CD-3000's (incl shipping) and $600 (NEW) for the Grado's. For me, it's not a monetary thing at all. I bought the RS-1 because of its huge fan base and overwhelming positive reviews. I'm simply not all that impressed compared to the Sony CD-3000.
I am expecting to receive a set of SA-5000's on Monday -- another recent purchase from a Head-Fi member. It will be interesting to compare the Grado RS-1, CD-3000, and SA-5000. I have a pretty strong suspicion, based on what I've read, that the SA-5000's are going to appeal to me. If so, it's looking quite likely that the Grado's will be up for sale next week... So, if you are interested in a good deal on a 2-week old set of RS-1's in immaculate condition, stay tuned (or write me privately).
Ken
P.S. If I sell the Grado RS-1's and keep the CD-3000 and SA-5000, I will be in the market for a STAX setup. I simply have to own a set of electrostatics. I'm currently craving the SR-007 + SR-717 combination.