Review: Superlux HD-668 B

Superlux HD-668 B

We fancy a bit of ambition in the products we review, and without a doubt and hesitation, I affirm that Superlux HD-668 B is a proof of innovation and high performance.

These headphones designed mainly for tracking and mixing, for this job they’re nothing short of amazing. They have a convincing sound quality which works best for not only casual listening but largely for professional use cases hence its sound profile is a bit more analytically; the bass is subtle, and the vocals are present in the upper end just perfect.

The mentioned attributes are essential for you, because it’s what filters the good studio headphones from the entire cluster. I don’t deny you cannot find a cheaper deal, but most are nowhere near as high performing/valuable as these headphones.

1. Overview | 2. Product Review | 3. Advantages & Disadvantages | 4. Conclusion


The Beyerdynamic DT-770 Pro are a closed-back studio headphones that won’t take long to convince you of its many strengths. The comfort and build is impeccable, sound is balanced to a high degree with many clear frequencies.

Key Features

  • Good and in my opinion very neutral sound
  • Large frequency spectrum range
  • Valuable processing
  • Very good price / performance ratio

Superlux HD-668 B Review

Due to the closed design, which I had also chosen deliberately, you can concentrate very well on mixing, since the ears are very well shielded and the sound isolation is highly effective. The headphones stay perfectly without being too tight, even with glasses on. The insulation is of excellent quality – these studio headphones isolates much external noise and produces almost no noise. It is therefore perfect both to recording and monitoring if necessary a mix done with monitoring speakers, or to record a singer who uses it in listening.

The rendering seems pretty equal, that’s what we are looking for a studio headset. We agree: it is not a Hi-Fi headphones (which flatters the bass excessively); it is not made for that.

After long usage I do not feel any discomfort or auditory fatigue; I sometimes work for ten hours in a row, but I do take ocassional breaks of 10 minutes every two hours.



HD-668 B

Recording and Mixing

3 m Spiral cable / 3.5 mm Plug connector / 6.3 mm Adapter / Drawstring bag

The sound is fantastic, very balanced, truly sensational for a closed headphone. The comfort is very good, the upholstery is not made of faux leather (which becomes sticky over time and causes perspiration) but of a “fabric-like” material, which is very pleasant on the skin, so that the sweating is limited. In winter, virtually no sweating! The ear-enclosing construction does not create any unpleasant pressure on the ears. The weight is relatively low (290 g). You can wear it for hours without getting uncomfortable.

Advantages & Disadvantages of Superlux HD-668 B

The only drawback I can find is that the cable can not be replaced. The upholstery of the earpiece and the holder are interchangeable, unfortunately, a cable break in this case would lead directly out. Therefore you have to buy another piece.

For some, it might sound like a lot of money, but I can only highly recommend these headphones. They are more of a purchase for life, as long as you take care of them properly.

  • Sturdy and lightweight
  • Effective entry-level gear for monitoring
  • The bass feels slightly recessed


I’ve been using the DT-770 both for listening and audio monitoring for almost 3 weeks, all I could say is they are excellent for both! The audio playback is linear and if you get used to the pitfalls of mixing with headphones, you get quite useful results. Because these headphones aren’t truly as linear as a top-tier reference headphpones, they cannot be an alternative to professional monitors, but for a lot of people they are an excellent stand-in for critical listening.

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