FIBAE 5 utilizes the world’s first, patented, Flat Impedance design. Featuring five drivers in tri-brid configuration: single Sub-Low Dynamic Driver, dual Mid Flat Impedance Balanced Armatures and two Planar Magnetic high frequency drivers. FIBAE 5 is Custom Art’s take on fusion of the best technologies available with energetic, bold and engaging sound signature.

Thanks to our revolutionary Flat Impedance technology, FIBAE 5 will retain its sound signature with all audio players, sound cards, amplifiers or just a smartphone. Read more

  • Single 10mm Dynamic Driver Sub-Low, dual BA Mid, single Planar High, single Planar Super High
  • 109dB @1kHz @0.1V
  • 3D-printed waveguide
  • 10 Ohm @1kHz (+-2 Ohm 10Hz-20kHz)
  • 10Hz-21000Hz (+-5dB into IEC 60318-4 coupler)
  • Custom or universal fit

FIBAE 5 signifies the next step of Custom Art’s IEM development – a new, uncharted, dimension of sound. We tuned FIBAE 5 to be energetic, visceral and powerful, to deliver heavy but perfectly controlled sub-bass, natural, warm midrange and fast and unconstrained highs. Our goal was a smooth, bassy and detailed sound signature with an unmistakable Custom Art’s house sound flavor.

FIBAE 5 presents a modern approach tuning with an increased bass and highs quantity keeping the overall balance. Our Pressure Optimizing Design (P.O.D.) normalizes the pressure in front of Dynamic Driver, which expands the soundstage and enhances the musical image.

We dedicate FIBAE 5 to audiophiles and enthusiasts, who like more colored sound, with a bit more bass quantity and who are eager to experience the newest technologies without compromising the sound quality. FIBAE 5 is also a great choice for drummers, bassists and DJs – professionalists who expect the most pronounced and deepest bass from their monitors, without losing a single detail. FIBAE 5 delivers punchy deep lows, smooth mids and insanely fast and detailed highs with an accurate timber – a modern tuning, combined with a slight V-shape approach, resulting in fun and enjoyable mainstream signature.




Disclaimer: 3.5 mm, no mic+remote cable is provided by default. For 2.5 mm or 4.4 mm cables, please leave a note at checkout.

Extra options:
Artwork: €25/side
Special faceplate (wood, carbon, aluminum): €15/side
Special canal color: €15/side
Custom shell color: €50/side
Galaxy or bespoke designs (faceplate only): €50/side
Galaxy or bespoke designs (shell only): €50/side
Galaxy or bespoke designs (whole IEM): €100/side

– Single 10mm Dynamic Driver Sub-Low, Dual BA Mid, Single Planar High, Single Planar Super High
– Tri-brid: Dynamic, Balanced Armature & Planar Magnetic Drivers
– Flat Impedance technology
– Pressure Optimizing Design
– 3D-printed waveguide
– 109 dB @1kHz @0.1V
– 10 Ohm @1kHz (+-2 Ohm 10Hz-20kHz)
– 10Hz-21000Hz (+-10dB into IEC 60318-4 coupler)

– EVA case
– Wax pick tool
– Drying pellet
– Warranty card
– Ear tips (universal fit variant only)
– Tuning kit

Univeral-fit, ready-to-ship version is available here



Ear impressions

Impressions have to be made from soft silicone material. Dreve, Egger and Westone brands are recommended. It is suggested to use foam or cotton swabs to protect eardrum.

Impressions have to be made past the second bend and shall include: full concha, helix, crus helix, tragus and antitragus.

After injecting impression material into ear the mass needs to be pushed with thumb to remove air bubbles and reduce impression wastage. Typically material cures within 5 minutes. Impressions cannot be taken out before that period.

During the process, mouth should be open with bite-block inserted between teeth in order to maximally stabilize the jaw. If a bite block is unavailable then teeth might rest against something of similar size, for example a thumb. Keeping mouth open at about 2.5 cm in relaxed manner without talking and moving is required for achieving full comfort and isolation of final product.

If above instructions are insufficient, please mail us at When your molds are done, please send them to our lab (remember about 5-15 USD customs value).

We strongly advise to send us pictures of your ear impressions for first quality evaluation. We also accept 3D-scanned earmolds.
If you live in a country where our dealers operate, they will be happy to assist you with the whole process and recommend trusted and skilled local audiologists.

Impressions can typically be made in shops selling hearing aid products. We recommend checking google maps for nearby audiologists.

In Europe we recommend Amplifon hearing aid chain.

In the US H.E.A.R. associated audiologists.
Our experience is that prices vary greatly depending on place. It can be anywhere from 5 to €100 so please contact your audiologist beforehand and ask for quote.
We are happy to take your ear impressions in our lab. Please call or email us in advance to make sure our audiologist is available for the procedure. The price is 60 PLN.
Every ears do change, but custom IEMs should fit an adult for a few years.
Impressions will be stored at our lab in physical form for up to 2 years, and indefinitely in form of 3D scans. If you want molds to be sent back together with the order please select this option at check out or let us know via e-mail.
In some unique cases - yes - especially in case of silicone IEMs, which are manufactured differently than acrylic and require thicker shell walls. Therefore, if your ears are compatible with, say, 8-driver acrylic IEMs, it doesn’t automatically mean that 8-driver silicone IEMs will fit your ears.

In most cases we can make a judgment from picture of your impressions and thus spare you unnecessary cost of shipping if your ears are too small.

Our typical turnaround is 4-5 weeks from the moment of accepting your ear impressions and getting payment.

Note: turnaround time is subject to change depending on current load. Please inquire before ordering.
We ask for payment only after receiving and accepting your ear impressions.
Wire transfer in EUR or USD is the best option.

Make sure to check charges rate at your bank first!
For overseas transfers we recommend using Transferwise service.

We also accept PayPal in EUR or USD, however it involves additional fee of 4%.
All of our clients are equally important so all orders are processed chronologically based on payment date, no matter if they concern the cheapest or the most expensive IEMs.
It all depends on what stage your order is. Please contact us at and we will do our best to help you.
Sure! Please call us or mail us to make an appointment.
No, we no longer offer such services.
Surely, customs offer great fit and level of isolation you won’t ever get from universal IEMs. More real estate inside a custom shell allow for more sophisticated acoustic solutions.