Hefio - Experience sound as in reality

Your sound profile in 10 seconds with a single click

Hefio is taking a completely different approach towards a fully personalized hearing experience. Our self-calibrating headphones are capable of producing a sound spectrum that is individually optimized for your unique ears.


The built-in microphones capture the sound inside the ear canals.


The standalone Signal Processor analyzes the sound and makes an accurate estimate of the sound spectra at the eardrums.


Now you are ready to enjoy the perfect audio optimized for your unique ears!

Your ears are unique.

Individual differences between the in-ear spectra within a test group of 60 subjects with similar physiological characteristic.

Everyone’s ears are different and therefore everyone hears sound differently. The differences are huge. Even more surprisingly, your right and left ears have their own unique characteristics.

Still normal headphones don’t take individual differences into account. This leads to a problem. The sound is always colored: it’s just like wearing colored lenses all the time. This results in reduced sound quality for all users.

Hefio are the only headphones that deliver the sound without any coloration – as it is in reality.

Hefio Play are your perfect headphones!

Latest news

Hefio joins forces with Genelec and Ida Audio

We are excited to announce strategic partnership with Genelec and IDA Audio. Genelec is the world leader in professional audio monitoring. IDA Audio is offering ground-breaking HRTF technology. This announcement takes place at Slush Music, an…

International Congress on Sound and Vibration

Hefio will be attending the 23rd International Congress on Sound and Vibration from the 10th to the 14th of July in Athens. The ICSV 2016 is the 23rd International Congress on Sound and Vibration 2016 and one of the most remarkable events…

Audio Engineering Society Paris 2016

From the 4th (Saturday) to 7th (Tuesday) of June Hefio will be at the 140th International AES International Convention in Paris. The AES is Europe’s largest gathering of audio professionals from around the globe, from cutting edge research…

Hefio Demo Day

  Next Friday the 13th (May) from 10 to 18 you are welcome to come to the Urban Mill (3rd floor)* and have a listening experience by trying out our Hefio One. You can bring your own headphones for comparison. Hefio One is the…