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PSI Audio

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From Wikipedia, the free encyclopedia
PSI Audio
IndustryStudio monitors and active acoustic treatment systems
Founded1977, Switzerland
FounderAlain Roux
Headquarters
Yverdon-les-Bains
,
Switzerland
Area served
Worldwide
Websitewww.psiaudio.swiss

PSI Audio is a Swiss manufacturer of professional studio monitors, loudspeakers, and active acoustic treatment systems.[1][2] The company is best known for its emphasis on analogue signal processing and proprietary loudspeaker technologies.[3][4] Its studio monitors are characterized by accurate and transparent sound reproduction with neutral tonal balance.[5]

History

[edit]
PSI A21 and A17 studio monitors

Audio engineer Alain Roux began designing and building loudspeakers while studying electrical engineering at the École Polytechnique Fédérale de Lausanne in 1975. In 1977 he established Roux Electroacoustique, initially producing loudspeakers for hi-fi and public address applications. The company later expanded into professional monitoring systems.[6]

In 1988 the company became Relec SA and relocated to Yverdon-les-Bains. During this period it manufactured loudspeakers, and in 1992, the it entered into a partnership with Studer, developing and manufacturing the Studer A1, A3 and A5 active studio monitors as OEM products.[7]

In 2004, following the end of the Studer partnership, Relec launched PSI Audio as its own professional monitoring brand, commercializing technologies that had previously been developed for Studer products. PSI Audio continued introducing proprietary analogue technologies, including Adaptive Output Impedance (AOI), Compensated Phase Response (CPR) and proprietary Class G/H amplifiers, which became standard across much of its product range.[8][9]

In 2016 the company introduced the AVAA C20, described as the first commercially available analogue active bass trap based on acoustic absorption rather than electronic room correction. In 2023 PSI Audio released the AVAA C214, adding digital control and network connectivity.[10] In 2025 the company introduced the A226-MAIN three-way main monitoring system.[11][12]

Technology

[edit]
PSI AUDIO monitors

PSI Audio develops monitoring systems using analogue signal processing. According to the company, analogue circuitry avoids signal latency and eliminates additional analogue-to-digital and digital-to-analogue conversion stage. Its Compensated Phase Response (CPR) technology delays higher frequencies to align them more closely with lower frequencies, improving transient reproduction while maintaining low latency.[13] Proprietary technologies include:

  • Adaptive Output Impedance (AOI): a motion-feedback system that continuously adjusts amplifier output impedance to improve driver damping and reduce resonances.
  • Compensated Phase Response (CPR): an analogue all-pass filter network designed to improve phase coherence and transient response while maintaining low latency.
  • Class G/H amplification: proprietary multi-rail power amplifiers developed for higher efficiency and reduced thermal stress.
  • Flow Guide: an internal bass reflex port geometry intended to reduce turbulence and resonances within ported loudspeaker cabinets.
  • AVAA (Active Velocity Acoustic Absorber): an active acoustic device that absorbs low-frequency room energy without using anti-phase cancellation or conventional passive bass trapping.[14][15][16]

Bass-reflex loudspeakers incorporate a proprietary Flow Guide, an internal structure designed to regulate airflow within the port and reduce aerodynamic noise and internal resonances.[17]

AVAA

[edit]
AVAA C20

The AVAA (Active Velocity Acoustic Absorber) are a unique type of active acoustic absorbers[18] that employ analogue electronic design (AVAA C20)[19] and digital signal processing (AVAA C214).[20][21] Unlike conventional passive bass traps, AVAA units use active acoustic technology to reduce low-frequency resonances over a frequency range of approximately 15-160 Hz.[22][23]

AVAA respond to pressure variations caused by room modes, designed to reduce low-frequency room modes and standing waves. It modifies the acoustic impedance at its location, allowing it to reduce standing-wave resonance without introducing an audio signal into the room. It requires no electronic calibration, instead being positioned at locations of high acoustic pressure, typically room corners.[24] It operates by sensing pressure variations associated with standing waves and altering the acoustic impedance at its location. The device functions as an active low-frequency absorber rather than using phase cancellation or conventional porous absorption materials.[25][26]

AVAA C214

The AVAA C20 was introduced in 2016. It uses an analogue electronic design that operates over a frequency range of 15–150 Hz. It is often used in recording studios, home studios, broadcast facilities, and listening rooms.[27]

The AVAA C214 was introduced in 2023 and uses digital signal processing. Ithas a cylindrical aluminium enclosure and is controlled through a mobile application that allows adjustment of operating sensitivity. It has an operating range extending to 160 Hz.[28][29]

Products

[edit]

PSI Audio manufactures active studio monitors, loudspeakers, and acoustic treatment systems.

Studio mointors
A14-M Studiocompact two-way active nearfield loudspeaker.[30]
A14-M Studiocompact two-way active nearfield loudspeaker.[31]
A14-M Broadcastbroadcast-oriented version of the A14-M intended for radio and television applications.
A17-Mtwo-way active nearfield monitor.
A21-Mlarger two-way active midfield monitor intended for greater listening distances.[32]
A23-Mthree-way active studio monitor. It incorporates AOI, CPR, and custom-designed drivers.
A25-Ma larger three-way active midfield monitor intended for mastering and mixing.[33]
A215-Mcompact mastering monitor.
A214-Mdedicated centre-channel loudspeaker designed for surround and immersive audio systems.
A226-MAINthree-way main monitoring system.[34]
A326 D-REXdynamic range extender.[35]
Sub A125-Mcompact active subwoofer.
Sub A225-Mhigher-output full-range subwoofer.[36]
Bass traps
AVAA C20the device operates over approximately 15–150 Hz and was designed to reduce standing waves and room resonances.[37]
AVAA C214second-generation active bass trap that extends the operating range to approximately 15–160 Hz.[38][39]
[edit]

See also

[edit]

References

[edit]
  1. ↑ Winer, Ethan (2018). The Audio Expert: Everything You Need to Know About Audio (2nd ed.). Routledge. p. 773. Retrieved 3 August 2026 – via Google Books.
  2. ↑ Hepworth-Sawyer, Russ; Hodgson, Jay (2018). Audio Mastering: The Artists: Discussions from Pre-Production to Mastering. Routledge. p. 92. Retrieved 3 August 2026 – via Google Books.
  3. ↑ Journal of the Audio Engineering Society. Audio Engineering Society. Retrieved 3 August 2026 – via Google Books.
  4. ↑ Winer, Ethan (2018). The Audio Expert: Everything You Need to Know About Audio (2nd ed.). Routledge. p. 773. Retrieved 3 August 2026 – via Google Books.
  5. ↑ Robjohns, Hugh (September 2016). "PSI Audio A14-M Studio". Sound On Sound. Retrieved 4 August 2026.
  6. ↑ "History". PSI Audio. Retrieved 3 August 2026.
  7. ↑ Réveillac, Jean-Michel (2022). Recording and Voice Processing, Volume 2: Working in the Studio. ISTE Press/Wiley. p. 56. Retrieved 3 August 2026 – via Google Books.
  8. ↑ Réveillac, Jean-Michel (2022). Enregistrement et traitement de la voix. 1: Historique et généralités. ISTE Éditions. p. 67. Retrieved 3 August 2026 – via Google Books.
  9. ↑ Réveillac, Jean-Michel (2022). Recording and Voice Processing, Volume 2: Working in the Studio. ISTE Press/Wiley. p. 56. Retrieved 3 August 2026 – via Google Books.
  10. ↑ audioXpress Staff (28 January 2019). "New Three-Way A23-M Studio Monitor Introduced by PSI Audio at NAMM Show 2019". audioXpress. Retrieved 3 August 2026.
  11. ↑ Woods, Mark (19 September 2014). "Review: PSI Audio A21-M Studio Monitors". AudioTechnology. Retrieved 3 August 2026.
  12. ↑ "PSI Audio A17-M". Fidelity Magazine. 4 November 2021. Retrieved 3 August 2026.
  13. ↑ Rodgers, Julian (3 August 2024). "PSI Audio A17-M – The All Analogue Monitors You Should Know About". Production Expert. Retrieved 4 August 2026.
  14. ↑ Ballou, Glen; Jones, Doug, eds. (2025). Handbook for Sound Engineers (6th ed.). CRC Press. p. 301. Retrieved 3 August 2026 – via Google Books.
  15. ↑ "PSI A21-M Monitor Review". Audio Science Review. Retrieved 3 August 2026.
  16. ↑ Ward, Phil (November 2013). "PSI Audio A25M". Sound On Sound. Retrieved 3 August 2026.
  17. ↑ Martins, João (4 February 2021). "PSI Audio Updates Flagship Three-Way A25-M Studio Monitors for 2021". audioXpress. Retrieved 4 August 2026.
  18. ↑ WO 2016083971A1, Roux, Alain; Martin, Christian & Pittet, Antoine et al., "Low frequency active acoustic absorber by acoustic velocity control through porous resistive layers", published 2 June 2016, assigned to RELEC SA
  19. ↑ Hong, Andy (July–August 2016). "PSI Audio AVAA C20 Active Bass Absorber". Tape Op. No. 114. Retrieved 1 August 2026.
  20. ↑ Ward, Phil (January 2024). "PSI Audio AVAA C214". Sound On Sound. Retrieved 1 August 2026.
  21. ↑ Klose, Philipp Paul (November 2024). "Fresh From the Bench: PSI Audio AVAA C214 Digital Active Bass Absorber". audioXpress. Retrieved 1 August 2026.
  22. ↑ "Bass trap PSI AVAA". mbakustik GmbH. Retrieved 1 August 2026.
  23. ↑ Kökbugur, Sinan (6 May 2024). "PSI Audio demonstreert Active Velocity Acoustic Absorber C214 op High End München". HiFi.nl. Retrieved 1 August 2026.
  24. ↑ Robjohns, Hugh (August 2016). "PSI Audio AVAA C20". Sound On Sound. Retrieved 1 August 2026.
  25. ↑ Martin, Tom (2 January 2024). "PSI Audio AVAA C214 Active Bass Traps Review". The Absolute Sound. Retrieved 1 August 2026.
  26. ↑ Acoustics Insider (2025). "Is the PSI AUDIO AVAA Worth $3,300? I Tested It in 10 Studios". Acoustics Insider. Retrieved 1 August 2026.
  27. ↑ Katz, Bob (1 June 2016). "PSI Audio AVAA C20 Electronic Bass Trap". Stereophile. Retrieved 1 August 2026.
  28. ↑ Veenstra, Jaap (15 September 2023). "Review AVAA C214 – Active Bass Control". Alpha Audio. Retrieved 1 August 2026.
  29. ↑ "PSI Audio AVAA C214 eliminates room modes with maximum efficiency". Audio Media International. 2 July 2024. Retrieved 1 August 2026.
  30. ↑ Robjohns, Hugh (September 2016). "PSI Audio A14-M Studio". Sound On Sound. Retrieved 3 August 2026.
  31. ↑ Robjohns, Hugh (September 2016). "PSI Audio A14-M Studio". Sound On Sound. Retrieved 3 August 2026.
  32. ↑ Robjohns, Hugh (July 2011). "PSI Audio A17M & A21M". Sound On Sound. Retrieved 3 August 2026.
  33. ↑ Ward, Phil (November 2013). "PSI Audio A25M". Sound On Sound. Retrieved 3 August 2026.
  34. ↑ Wood, Luke (18 July 2025). "PSI Audio Introduce A326 D-REX". Sound On Sound. Retrieved 3 August 2026.
  35. ↑ Wood, Luke (29 November 2025). "PSI Audio Launch First Extended Main Monitor System". Sound On Sound. Retrieved 3 August 2026.
  36. ↑ Wood, Luke (17 December 2025). "PSI Audio Introduce Custom Pro Line". Sound On Sound. Retrieved 3 August 2026.
  37. ↑ Robjohns, Hugh (August 2016). "PSI Audio AVAA C20". Sound On Sound. Retrieved 3 August 2026.
  38. ↑ Ward, Phil (January 2024). "PSI Audio AVAA C214". Sound On Sound. Retrieved 3 August 2026.
  39. ↑ Huber, David Miles; Runstein, Robert E. (2017). Modern Recording Techniques (9th ed.). Routledge. p. 174. Retrieved 3 August 2026 – via Google Books.
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