I have had two bad experiences with Grado headphones. Both pair developed opens in the wiring going into the cups, which then led to filing them in the circular file cabinet, as I simply could not figure out how to open them to fix them, with out taking a hack saw to them. I believe one pair was a 225 and the other a 325 model. I seriously wanted to try out some of the reference wooden ones, but not with the bad track record on the cheaper units. If wiring is not stable/reliable on the mid-units, I sincerely doubted it would be better on the upper units. I simply quit using headphones after that point, as I was tired of throwing money away on bad situations. I also tried a $400 pair of Pioneer wireless ones that cut out all the time - Maybe the Demi-Goddess of headphones just hates me, or something. I guess I will just stick to 21's, 10's, and 4 compression drivers for anything over 5K.