HD-681 B : Good, balanced sound

They aren't called HD681b for nothing, with the 'b' standing for balanced. If you don't like the HD681 type of sound with its big bass and strong top end, this headphone addresses that big bass.

Many headphones are made with a 'hump' in the mid bass area which gives them a fullness that many like. However, headphone purists tend to like a flatter response and the HD681b addresses this. It has less bass than the standard HD681 which gives it better clarity. Perhaps if you listen to acoustic and classical music more than rock based music, then the 'b' version may well suit you better.

With less at the bottom end, the mids become perhaps a little more focused and the headphone seems less 'coloured'. However, if you like a strong, healthy bass, you may not like the sound of the 'b' version.

In all honesty, these Superlux headphones are at such a good price, I ended up buying both and switch between them, depending on what I am listening to.

Just like the standard HD681, they are a bargain for the sound that you get,