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Stellia

Driver
Dynamic
Enclosure
Closed-back
Weight
435 g
List
$2,999
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The closed-back sibling of the Utopia, with the same pure beryllium M-dome inside leather-covered cups. Focal tuned the cavity with EVA foam behind the driver and acoustic diffusers against standing waves.

Where to buy

List $2,999

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Title block

Maker
Focal
Model
Stellia
Made in
France
Released
2019
Transducer
Dynamic
Enclosure
Closed-back
Driver
40 mm
Weight
435 g
Impedance
35 ohms
Sensitivity
106 dB SPL / 1 mW @ 1 kHz
Frequency response
5 Hz – 23 kHz (±3 dB)
List price
$2,999 USD
LevelPowerVoltageCurrent
100 dB0.25 mW0.09 V2.68 mA
110 dB2.51 mW0.30 V8.47 mA
120 dB25.1 mW0.94 V26.8 mA

Most headroom at 110 dB

Rated 106 dB/mW into 35 ohms. Estimated from published amplifier output.

Assembly drawing

1234567

Parts

  1. 1HeadbandFull-grain leather headband
  2. 2YokeSolid aluminium yoke
  3. 3GrilleStainless steel, spiral pattern of graduated holes (per Moon Audio)
  4. 4Ear cupClosed cups covered in full-grain leather; shell material unpublished
  5. 5MagnetNot published
  6. 6DiaphragmPure beryllium M-shaped dome
  7. 7EarpadsShape-memory pads: memory foam under full-grain leather

Schematic dynamic assembly, annotated with the Focal Stellia’s published materials. Not to scale.

Engineering notes

  • Closed-back cup with vents, EVA foam behind the driver to absorb high frequencies, and acoustic diffusers against standing waves
  • Copper voice coil without a support (frameless) paired with the beryllium dome
  • Earpad height split: 50% non-perforated leather for diffusion, 50% acoustic fabric over memory foam for absorption
  • Headband and yoke mechanics developed for Utopia

Design language

Tailored and warm. Full-grain leather wraps the cups and the headband, cut and finished like fine leather goods.

Build the listening station

Desktop sanctuary

Sources