This is a review, listening tests and detailed measurements of the Aurorus Audio Borealis open-back headphone. It is on kind loan from a member and costs US $899.
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As the British say, the headphone looks a bit "agricultural" with what looks like stamped washer and twisted wire in the driver region. That aside, the headphone wears very comfortably with very large and plush ear cups. Let's see how it performs.
Aurorus Audio Borealis Measurements
Let's start with our frequency response measurements which have been slightly tweaked to have more resolution and extension down to 10 Hz:
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Focusing on the positive, as noted, we have good compliance from upper bass to lower treble. But clearly we are drooping in bass and have some resonances in high frequencies. As a relative "error" response we have:
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Shouldn't be too hard to develop EQ for it (see next section). Unfortunately distortion peaks in lower frequencies which may limit our options to boost that region as desired:
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Group delay is messy in mid frequencies as many headphones are:
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Impedance is low and variable so be careful with tube amps and such:
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Good news is that sensitivity is well above average:
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Combined with lowish impedance, most sources should be able to drive it.
Aurorus Audio Borealis Headphone Listening Tests
As the frequency response measurements would predict, first impression is decent. You could listen to it this way and not know the joys that some EQ brings:
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With this in place, the response was massively transformed. Together with excellent spatial qualities, the experience was joyful. Turning off the EQ quickly showed the large improvement you were getting not only in tonality but loss of distortion in female vocals. Guessing, that reduction with filter 4 was responsible. As usual, you want to adjust the bass to taste.
The Borealis design could have been better in delivering more bass with less distortion and reduction of some resonances. Fortunately most of it is repairable with EQ. Once there, the large cups bring both comfort and great spatial qualities that are rather addictive. Add to it the high sensitivity and you get a good offering with equalization.
I am going to recommend the Aurorus Audio Borealis headphone with equalization.
As always, questions, comments, recommendations, etc. are welcome.
are much appreciated using: https://www.audiosciencereview.com/forum/index.php?threads/how-to-support-audio-science-review.8150/