HD-668 B : Slightly disappointing compared to other Superlux headphones.

I've owned several of these cheap Superlux headphone models. Some of them have sounded very impressive for the price. These ones... not so much. Perhaps I just prefer differently voiced headphones but these ones seemed a bit too stiff and sterile sounding to me, and still not neutral/detailed enough for mixing (which to be fair would be too much to ask at this price).

Comfort is slightly better than on the other Superlux headphones I've tried though. I prefer this headband design over the one they use on their even cheaper models. They are still very clammy with their all plastic design though.

Build quality... Seems ok but I know from experience that all these cheap Superlux headphones have VERY thin and fragile cables that always break, usually near the plug. And the plug is of the molded kind so it's impossible to re-solder it. They can be fixed at the cost of a new jack plug but the thin wire is a pain to work with and it WILL break again.

I got these just to have a couple of extra cheap headphones in my control room but would never consider them for hifi/critical listening or mixing. And obviously the open back design limits their application for tracking work. But just to have around the control room as an alternative monitoring for doing synth/MIDI overdubs... they are great!

Very nice for the money. They feel less cheap than the price but they still feel cheap.