HD-681 Evo BK : An Improved HD681
I have the HD681 as well as the HD681b. The Evo is imo, the best vesrion of the HD681.
The bass is on about the same level as the HD681 but the treble seems more refined and less edgy.
The sound itself is wrapped on top of a big hearted bass. The bottom end is ramped up, very similar to the HD681 of old. However, the treble is less edgy so the headphone seems warmer and more bass focused. However, there is also a peak in the treble giving the top end a nice 'bite.'
The comfort is ok. I would suggest changing the pads for velour pads. A little more comfortable and less 'hot' for the ears.
I'm not keen on the shiny plastic finish on the sides. They are fingerprint magnets and I will be using a fine wet and dry cloth to rub this finish down to a matt look.
It comes with two cables that are easily attached to the headphone. One is nice and short for using with portable equipment and another to lengthen the lead.
For this kind of money, the HD681 evo is an absolute bargain if you like a bass led sound with good clarity and reasonable sensitivity for portables. It works exceedingly well with an amp and the bass is perhaps a tad more controlled.
Worth every penny.

Technical Data
- Manufactured by Superlux
- Released in 2013
- Average price : $35
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