H3 Pro

H3 Pro is Custom Art’s triple driver hybrid IEM with two dynamic drivers – single low and single mid, combined with a single Planar driver, featuring our latest technologies and developments, tuned for reference and neutrality.

Thanks to our Flat Impedance crossover design, Hybrid 3 Pro will retain its sound signature with all audio players, sound cards, amplifiers or just a smartphone.

  • Single Low Dynamic Driver, Single Mid Dynamic Driver, Single High Planar
  • 110dB @1kHz @0.1V
  • 3D-printed waveguide
  • 7 Ohm @1kHz (+-1.3 Ohm 10Hz-20kHz)
  • 10Hz-19000Hz (+-5dB into IEC 60318-4 coupler)
  • Custom or universal fit

H3 Pro has been equipped with a 10mm PEEK+PU composite diaphragm dynamic driver for low frequencies, 6mm graphene diaphragm dynamic driver for midrange and a small planar driver for high frequencies. Pressure Optimizing Design (P.O.D.) for normalizing pressure in front of the woofer. Tunable vent allows for full control of bass response by the user (filters sold separately). Special 3D-printed waveguide to finely tune midrange and high frequencies. Finally, a 3-way crossover with Flat Impedance ensuring always stable sound signature independently from a sound source.

H3 Pro delivers a balanced signature with weighty bass notes and focus on sub-bass, leaving mid-bass clean and fast for as much precision as possible. Vocals are beautifully rendered in a very Custom-Art-like fashion. Upper midrange and lower highs have been brought forward to better reproduce snare drums and guitar strings and piano. High tones are fast, detailed, extended and sibilance-free, however at the same time we wanted them to be a bit more true to recording showing any mastering or quality flaws without unnecessarily forcing its own style and masking onto the music.

We dedicate H3 Pro to professional musicians, vocalists, and music enthusiasts looking for precise stage sound. Keeping perfect balance of musicality, brightness, smoothness, speed, and detail. The tuning kit (available separately) allows to independently tune low frequency response by passive filters, much like in FIBAE 5, but to a greater extent and with bigger impact on the bass response, from completely flat to bass-heavy. The flexibility of H3 Pro’s signature allows for drums, guitar and vocal monitoring, as well as casual music listening with added advantage of sound personalization. Hybrid 3 Pro will easily find admirers for its uniqueness, balance, agility, and rawness.


Hybrid 3 Pro


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 Low Dynamic Driver, Single Mid Dynamic Driver, Single High Planar
– 3-way crossover
– Flat Impedance
– Pressure Optimizing Design
– 110dB @1kHz @0.1V
– 7 Ohm @1kHz (+-1.3 Ohm 10Hz-20kHz)
– 10Hz-19000Hz (+-10dB into IEC 60318-4 coupler)
– Low THD%
– Tunable bass response
– Null Audio Ethos 3.5mm stock cable

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

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

Additional tuning kit can be purchased 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 info@thecustomart.com. 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 info@thecustomart.com 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.