FIBAE Black comes as the highest-end performance packed in affordable housing. Described by independent reviewers as Custom Art’s best sound yet. Utilizing single custom Flat Impedance Balanced Armature driver coupled with Pressure Optimizing Design for unique immersive listening experience.

Thanks to our revolutionary Flat Impedance technology, FIBAE Black will retain its sound signature with all audio players, sound cards, amplifiers or just a smartphone. Read more

  • Single proprietary Balanced Armature
  • Pressure Optimizing Design
  • 108.5dB @1kHz @0.1V
  • Low %THD
  • 5.2 Ohm @1kHz (+-0.8 Ohm 10Hz-20kHz)
  • 3D printed acrylic shell
  • 10Hz-16000Hz (+-10dB into IEC 60318-4 coupler)
  • Custom or Universal fit

Accalimed by reviewers in blind tests:

“This is a fun sounding musical monitor with a killer low-end performance, lively vocal presence and sparkling treble response. A lot of people are going to enjoy Piotr’s new creation.” Marcus Downey (of

“This is Custom Art’s most progressive sound” yetsubguy812 (of

“This is TOTL kind of performance, seen also in the soundstage and element separation. I am impressed” PinkyPowers (of

Designed as a statement, breaking rules and going against the current. With only single Balanced Armature FIBAE Black produces sound unmatched by any IEM within its class and above. Pressure Optimizing Design allows for extremely precise control of frequency response, improving soundstage and separation capabilities, without issues arising from crossovers or multi-driver constructions.

Natural smooth sound with fast-paced deep bass, forward mids and smooth extended highs. Tuned for correct tone and enjoyment without sacrificing extension on both ends. It’s one of our most versatile IEM yet combining musicality and precision. FIBAE Black is the perfect choice for daily use.

Order your FIBAE Black here

Non-customizable, ready-to-ship version is available here.

There’s only one way
Price: starting from 450 EUR