I gotta find a Grado thread where there's some young people. For the record I'll be 58 in September. Next it'll be sexagenarians who can't hear an f•••ing thing trying to figure out which pads to put on their vintage "throwback" Grado's while plugging them into 75w McIntosh power amplifiers because they really can't hear a f•••ing thing. Hah? What?
I think sensitivity to the trebles on the Grado PS1000 has as much to do with associated components as with age. The treble hump on these cans, based on the sound of instruments I hear (not measurements) like violin overtones and sibilance, is around 7 to 10 KHz. It does not take a dog to hear that. There is not much response from the Grado PS1000 above 10KHz (cymbals).
I am 65 and, with most amps under $1,000 I tried, my PS1000 sounded like a bunch of screeching banshees. But with the MAD Ear+ HD (and a few top-notch but rather pricey amps), the sound was pure bliss, smooth midrange, excellent center image, well-articulated details and large sound stage (second only to the HD800). The Grado PS1000 sound wonderful with classical music (not with pipe organ or tympani though as the PS1000 has nothing below 50Hz) and also excel with Jazz and vocal. It is with rock, however, that the big hump around 70 to 100Hz comes into play for a most satisfying bass punch. The LCD2/3 bass, while deeper and weightier, sounds slow like a ponderous elephant in comparison.
Joseph Grado (or was it his son?) was on to something when he developed the U-shaped voicing for the Grado PS and GS series. It is far from neutral, but with the right associated components (ultra clean or rolled off trebles; well- controlled bass), the sound is so musical and even addicting. It should not have worked, but WORK IT DOES!!!
I have had just about all headphones in the past 10 years (except for a few costing over $10,000) and I can tell you no cans can do what the Grado does. When it is bad, it is so, so bad--sorry Donna Summers--but when it is right, it sounds just like the real thing. I have never been able to explain this.