Stellavox

Stellavox is a Swiss professional-audio company and brand associated with exceptionally compact, mechanically precise reel-to-reel magnetic-tape recorders. Founded in 1955 by Georges Quellet, the company developed equipment for demanding recording environments including radio reporting, television production, film-location sound, and studio recording. Its products were positioned as technically refined alternatives to better-known portable recorders such as those made by Nagra. Swiss hand production, complex mechanical construction, and stringent engineering standards contributed to high prices and limited production volumes, but also gave Stellavox equipment a lasting reputation among recording professionals and collectors. The company’s early products included compact recorders and dictation-oriented machines, followed by increasingly professional portable designs. The SP7, introduced in 1969, used an interchangeable headblock and became one of the company’s best-known field recorders; almost 2,000 units were reportedly built. Stellavox subsequently expanded its range with the quadraphonic 7 SQ, the SP8 family and its related variants, and the 88 TD and 9 TD studio machines. These products extended the brand beyond portable reporting equipment into high-end studio recording. The TD9 in particular became associated with the company’s technical prestige and was later regarded by enthusiasts as one of the outstanding analogue tape machines ever produced. In the late 1980s Stellavox began developing the Stelladat, a professional portable digital-audio tape recorder. The project arrived during a period of rapid change in recording technology. In 1989, before the product had reached break-even, the owners concluded that the market was moving quickly toward computer-based recording and that the established analogue product range had limited commercial potential. Financial backing was withdrawn and the company’s activities stopped. Sonosax, another Swiss audio company, acquired rights to continue developing Stelladat, although that project was later discontinued. Former Stellavox technicians continued maintaining existing equipment, helping preserve knowledge of the company’s designs. Stellavox was reconstituted in 2017 as Stellavox SA in Mendrisio, Switzerland. Swiss electronics engineer Stephan Schertler, who had been in contact with Georges Quellet and former technician Jean-Michel Simonet, helped re-establish the company. Schertler became president and Quellet honorary president. The revived enterprise retained the original emphasis on analogue recording technology and precision construction rather than attempting to compete broadly in mass-market digital audio. Its first reported product was the L10, released in 2020 as an improved input-output module for the TD9. The modern Stellavox identity therefore combines heritage maintenance, specialist analogue engineering, and the restoration or enhancement of historically important professional recording equipment.

Stellavox was founded in Switzerland in 1955 by Georges Quellet. From its earliest years, the company concentrated on compact recording equipment and later developed machines for professional broadcast and production work. Its engineering philosophy emphasized mechanical precision, portability, and robust operation. This made Stellavox recorders attractive to radio and television stations, as well as motion-picture location sound mixers seeking an alternative to Nagra equipment. The company’s product chronology began with early models such as the Model 54 and Model 56, followed by the SM 0, SM 4, Fi-Cord 101 transistor dictaphone, and the 5 SM professional recorder for radio reporters. In 1969 Stellavox introduced the SP7, a portable reel-to-reel machine with an interchangeable headblock. Approximately 2,000 SP7 units were built, making it one of the more substantial production runs in the brand’s history while remaining a specialized professional product. The 7 SQ followed in 1972 as a quadraphonic adaptation of the SP7 concept. During the 1970s and 1980s Stellavox broadened its analogue range. The SP8 developed into several related configurations, including the SU8, SR8, SM8, SI8, and SD8 variants. In studio equipment, the 88 TD served as a universal studio recorder from 1979, while the 9 TD developed from that design and became a particularly influential high-end machine. The company also produced the 9 SP, a later development of the SP8 platform. Because Stellavox equipment involved complex technical solutions and precision Swiss hand production, prices were high and output was limited. Only a few hundred units were produced for some of the company’s most elaborate machines, reinforcing their specialist and collectible status. In the late 1980s Stellavox attempted to address the transition from analogue tape to digital recording by developing the portable professional Stelladat digital tape recorder. The product did not reach break-even before the owners decided in 1989 that the market was changing too quickly toward computer recording. They ended financial support and stopped the company’s activities. Sonosax acquired rights to continue development of Stelladat, but abandoned the project some years later. Maintenance of older Stellavox products nevertheless continued through two former technicians, preserving service expertise and practical knowledge of the machines. A new phase began in 2017, when Stellavox SA was reconstituted in Mendrisio, Switzerland. Stephan Schertler, a Swiss electronic engineer who had been in contact with Georges Quellet and former technician Jean-Michel Simonet, helped revive the company. Schertler became president and Quellet honorary president. Rather than abandoning the original identity, the re-established company returned to analogue technology and to products related to the historical Stellavox range. Its first reported release was the L10 in 2020, an improved input-output module for the TD9. The modern brand consequently operates as a niche specialist focused on the continued use, enhancement, and preservation of high-end analogue recording technology.

1. 2020L10 released

   The revived company released the L10, an improved input-output module for the TD9.

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2. 2017Stellavox SA re-established

   Stellavox SA was reconstituted in Mendrisio under the leadership of Stephan Schertler.

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3. 1989Original company activities stopped

   Funding was withdrawn during development of Stelladat, and Stellavox’s original operations ended.

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4. 19849 TD developed

   The 9 TD studio machine was developed from the 88 TD and became a defining Stellavox design.

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5. 197988 TD studio recorder introduced

   Stellavox expanded its studio range with the 88 TD universal studio recorder.

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6. 19727 SQ introduced

   The company introduced the 7 SQ, a quadraphonic version related to the SP7 platform.

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7. 1969SP7 introduced

   Stellavox introduced the SP7 portable professional reel-to-reel recorder with an interchangeable headblock.

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8. 1955Stellavox founded

   Georges Quellet founded Stellavox in Switzerland.

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A specialist Swiss professional-audio brand centered on precision analogue tape recording, compact engineering, repairability, and historically significant equipment for field and studio use.

• Model 54Portable tape recorder1954

  An early Stellavox recorder associated with the company’s initial development of compact magnetic-tape equipment.

• SP7Portable professional reel-to-reel recorder1969

  Introduced in 1969, the SP7 was a professional field recorder with an interchangeable headblock. It was used in demanding broadcast and location-recording contexts and became one of Stellavox’s best-known products. Nearly 2,000 units were reportedly produced.

• 7 SQQuadraphonic reel-to-reel recorder1972

  The 7 SQ was introduced as a quadraphonic version related to the SP7 recorder family, extending Stellavox’s portable analogue platform for multi-channel applications.

• SP8 familyPortable professional reel-to-reel recorder1975

  The SP8 generation represented a later development of Stellavox’s portable professional recorder platform. Related configurations included the SU8, SR8, SM8, SI8, and SD8 variants, reflecting different intended recording and studio applications.

• 88 TDStudio tape recorder1979

  The 88 TD was Stellavox’s universal studio recorder, introduced as the company expanded from portable field equipment into high-end studio machines. It provided the design basis for the later 9 TD.

• 9 TDStudio tape recorder1984

  Developed from the 88 TD, the 9 TD was a precision studio recorder that became central to Stellavox’s reputation. The machine is particularly associated with the company’s high-end analogue engineering and later revival efforts.

• StelladatPortable professional DAT recorder

  Stelladat was Stellavox’s late-1980s attempt to enter professional digital portable recording through a DAT-based machine. Development continued under rights acquired by Sonosax after Stellavox stopped operations, but the project was later discontinued.

• L10Analogue recorder input-output module2020

  Released in 2020 by the re-established Stellavox SA, the L10 is an improved input-output module designed for the TD9 studio recorder. It marked the revived company’s first reported product and illustrates its focus on extending historic analogue equipment.

• 2020Launch the L10 TD9 moduleProduct launch

  The revived Stellavox SA focused on extending the useful life and capabilities of historically important analogue recorders.

  What changed. The company released the L10, an improved input-output module for the TD9.

  Aftermath. The release marked the first reported product from the re-established Stellavox SA.

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• 2017Re-establish Stellavox as an analogue specialistStrategy

  Stephan Schertler and associates sought to preserve the company’s engineering philosophy and historical product knowledge after the original business had ended.

  What changed. Stellavox SA was reconstituted in Mendrisio with a renewed focus on analogue recording technology and products related to the historical range.

  Aftermath. The revived company released the L10 module for the TD9 in 2020.

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• 1989End original Stellavox operationsStrategy

  The company was developing the Stelladat portable professional digital tape recorder while the recording industry was moving rapidly toward computer-based production.

  What changed. The owners withdrew financial support and stopped all company activities before Stelladat reached break-even.

  Aftermath. Sonosax acquired rights to continue Stelladat development, but later discontinued the project. Former Stellavox technicians continued maintaining older products.

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• 2020Stellavox released the L10 module for the TD9

  The revived company introduced the L10, an improved input-output module intended for the legendary TD9 studio recorder.

  Product launchProduct generation
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• 2017Stellavox SA reconstituted in Switzerland

  Stephan Schertler and associates re-established Stellavox SA in Mendrisio, reviving the brand’s focus on specialist analogue recording technology.

  Leadership change
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• 1989Stellavox activities discontinued after Stelladat development

  The owners withdrew financial support after concluding that recording was moving rapidly toward computer-based systems and that the company’s traditional products lacked sufficient commercial potential.

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• 1989Sonosax acquired rights to continue Stelladat development

  Sonosax acquired rights connected with the portable professional Stelladat digital tape recorder, but later stopped the project.

  M&AProduct generation
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1. Stellavox