Sigma's once ruled the world
I saw ferrstein's Sigma's and thought I would comment on where headphones stand in relation to the rest of audio.
I bought my Sigma's in 1979 along with the SRA-12 amp that I could plug my turntable directly into because it had it's own phono stage. Not only were they vastly superior to my NAD amp/Clestion UL-6 speaker set-up but they blew away every amp/speaker combo I heard at every high-end dealer I visited in the Orange/LA County area at the time. Nothing even came close.
So a couple of years ago I got to thinking about those old cans and decided to try the modern version and bought the 3030 system from Audiocubes. I compared them to my current rig comprised of DIY sub with current Parts Express 8" speaker/250w amp, Maggie 1.6's from 40hz to 500hz, Altec-Lancing 902's on 500 horns from 500hz to 12,000hz and 6" Aurum Cantus Ribbons from 12,000hz up. Innersound Electrostatic amp on the Maggies. Yamamoto A-08S amp with EML solid plate 45's on the Altec's. DIY Paridise Gain Clone amp on ribbons. Marchand XM44 crossover. Tweaked Wright WPL-20 pre with Tungsram E80CC's , RCA 12SX7's and law-faked PEC carbon volume control.
While the 3030's cost a lot less than my current system the Sigma's cost a lot less than the rigs I was comparing them to 25 years ago.
Well, times change. Audio has advanced. Today's stereos sound amazing. I guess the jist is you can no longer buy a set of headphones off the shelf that sound better than any speaker system out there.