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Final Sonorous III Closed Back Headphones with Replaceable Cable

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  • Clear and transparent sound signature with wide sound stage

  • Rigid ABS housing finished with rough coating

  • Integrated front plate and titanium diaphragm driver unit

  • BAM mechanism optimises air movement inside housing

  • Detachable cable with locking mechanism

Final Sonorous III Closed Back Headphones with Replaceable Cable

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Final Sonorous III

Japanese audio experts Final have added the Sonorous III to their acclaimed headphone range with the same design techniques, technology and tonal characteristics as the company's flagship headphones. With different materials, lighter weight and lower price tag, the Sonorous III still exhibits stellar sound as expected by Final.

Sonorous III employs the same driver technology as the flagship model and has been tuned for a clear, transparent sound signature with wide sound stage and hightened bass response. Sonorous' dynamic driver has been integrated with the front plate to help keep vibration in check. The plate is polycarbonate strengthened with 30% glass rather than machined aluminium used for the Sonorous X.

Sonorous headphones incorporate Final's Balancing Air Movement system that optimises the airflow around the whole driver resulting in a powerful and balanced listening experience. Sonorous III's closed earcup design and full-size earpads offer superior sound isolation against external noise. The soft padded headband allows the Sonorous to offer highest levels of wearing comfort for long listening sessions.

Transparent audio with wide imaging.


Final Sonorous III


Precision Sound
Sonorous III headphones employs a driver unit integrated with the front plate, which results in resonance being suppressed and clear sound quality. With the same titanium diaphragm used in the SONOROUS X, this model has been tuned to offer a clear, transparent sound signature with wide staging and enhanced low end extension.

Balancing Air Movement
BAM technology mechanism optimises the air movement inside the housing and controls unwanted vibrations for balanced, natural sound that reduces unwanted sibilant high-frequency sounds. Sonorous III has been tuned to an extremely accurate level based on new knowledge expertise gained from the development of Sonorous X.

Superior Craftsmanship
To achieve a high level of precision with the hard ABS housing, simulations were carried out until the appropriate level of fluidity with respect to the moulding material was achieved. The rough textured finish suppresses unnecessary vibrations.

Improved Earpads
To achieve a superior fit Final have used synthetic leather earpads, which has an equal amount of flexibility both horizontally and vertically as real leather and have chosen a sponge with just the right amount of flexibility letting the Sonorous III achieve clear sound with highest levels of wearing comfort and isolation.


Final Sonorous III



  • Headphone Type: Closed back, circumaural (over the ear)
  • Housing: ABS Thermoplastic
  • Driver: Dynamic 50mm
  • Sound Pressure Level: 105dB
  • Impedance: 16Ω
  • Cable: Detachable audio cable (1.5m)
  • Connections: 3.5mm jack
  • Weight: 410g



  • Tuned for a clear, transparent sound signature with wide sound stage and enhanced bass
  • Earpads with sound absorption section contribute to clear sound quality
  • BAM mechanism realises bass and deep three-dimensional space reproduction
  • Rigid ABS housing finished with a rough coating
  • Integrated front plate and titanium diaphragm driver unit
  • Detachable cable with locking function



  • Final Sonorous III Headphones
  • Detachable audio cable (1.5m)


Product TypeHeadphones
Feature KeywordClosed, Comfortable, Hi-Fi, Noise Isolation, Over Ear, Over Head, Portable, Professional
Recommended UseDigital audio player, Hi-Fi, Portable audio system
Manufacturer Warranty1 Year
Included AccessoriesDetachable audio cable (1.5m)
Part NumberFI-SO3BD3
Headphone Fit TypeOver Ear
Headphones TypeHeadphones - binaural
Cable EntrySingle Sided
Cable Length1.5m
Connector AngleStraight
Connector TypeHeadphones (3.5 mm stereo jack)
Detachable CableYes
Driver Size50mm
Driver TypeDynamic
Connectivity TechnologyWired
Earcup DesignClosed Back
Frequency ResponseNo
Headphones Form FactorOver Ear
Headphones TechnologyDynamic
Number of DriversNo
Sound Isolation (dB)No
Sound Output ModeStereo
Smartphone CompatibilityNo
Smartphone ControlsNo
Total Harmonic Distortion (THD)No
Wireless TechnologyNo

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Customer Reviews

Nice sound - which is nice..........
by Froggitt on 30/12/2018
Rock and pop sound great wearing these comfortable headphones. There is a nice bottom end on the bass which, with the right amp (Linn, Panasonic, Arcam rHead), proves not to be too flabby or fat. The midrange always sems to be present no matter what the higher and bottom ends are putting out. Sounds great on classical and jazz recordings. The top end is nice and sharp with no pain enduring sharp, nasty highs at high volume. Soundspace is all encompassing but not overwhelming at all. Great headphones.

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