On fitting them it was immediately obvious that these devices actually cut down on the actual physical hanging space available. Went on quite easily. it implies that you either get 2 cables or a converter or something. Its muffled too. A credit was deposited to my account and I used that refund to purchase a new pair of their slippers. Ive bought these twice now for my husband. For reference, I own or have owned DT880/600s, DT770/80s, T90s, HD600s, 598s, 712Pros, and have spent a goodly amount of time with the LCD-2s, HD800s, and the DT1990s big brothers, the T1/v2s. The treble however was a bit too high and I had to tone it down using the Equalizer. I wish there was a couple more. I think I should have gone with a 9 and then used a shoe stretcher.