I have owned so many headphones over the last 50 years, it's a bit of an obsession. Grados are cool. They remind me of the bomber pilots from the early 40's. Nazi bastards.
I've had these 325's for many years. Recently installed Dekoni Grado pads made in China. They look ridiculous. The sound is probably an acquired taste, but Neil Young (Grado fanboy #1) is gonna love them. I don't care what the specs or freq. charts show--these cans with Dekoni velour pads have
huge bass, a big dip in the 500--1000 Hz range, and then a nice healthy burst between 2 and 4 kHz. Perfect for those of us who have destroyed the upper range of our hearing. Talkin' to you, Neil Young. You're just gonna have to try these pads on your Grados. Once the initial shock wears off, you'll be comin' back for more. By the way--Chord Electronics
M O J O 2. Best DAC amp ever. Forget about the features it lacks (balanced inputs? How long is your cable run? If it's a football field or Abbey Road Studios, you're gonna need balanced, The rest of you, chill).
Edit--just to clarify, the bass is taut, deep, and punchy like a REL subwoofer. Quick and nimble. No bloat like those horrendous BEATS or budget cans. It does not overpower the rest of the frequency range. The 2 kHz will stick out for a few minutes until your ears start to zero in on the mids, upper and lower, which are very sweet. Addictive. Just don't mix anything important on them.