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Revox

Revox is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Revox rather than just read about it. In short: ReVox (on-logo styling REVOX) is a brand name, registered by Studer on 27 March 1951 for Swiss audio equipment. History The first Studer-designed tape recorders were branded Dynavox.

Revox — main illustration
Revox — illustration

Key takeaways

  • Revox belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Revox to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Revox from memory before moving on to harder problems.

Reference excerpt

ReVox (on-logo styling REVOX) is a brand name, registered by Studer on 27 March 1951 for Swiss audio equipment.

History The first Studer-designed tape recorders were branded Dynavox. After the first production series of Dynavox recorders, a new marketing company was formed in 1950 called ELA AG. Revox was adopted as the brand name for amateur recorders, while the professional machines retained the Studer name. The first Revox-branded tape recorder was the T26, in 1952, successor to the Dynavox 100. The T26 was also made available as a radio-recorder combination unit. 2500 T26 recorders were made, priced at 1395.00 Swiss francs. The A36, the first 36 series recorder. became available in 1954. Unusual features for the time were pushbutton solenoid transport operations and a direct-drive capstan with no belts or idler wheels. The B36 of 1956 was the first 3-head model, the D36 of 1960 was the first stereo model.

The company moved to Löffingen and Bonndorf, West Germany, in 1966, due to labour issues in Switzerland. But the building of a second factory was started in Regensdorf, Switzerland in 1967 - to open in 1968.

In 1967 the 36-series tape recorders ended with the G36, and were superseded by the transistorised A77 with a servo-controlled direct drive capstan. Over 80,000 36-series recorders had been manufactured. The A77, of which more than 460,000 were built, was complemented by an integrated amplifier (A78) and FM tuner (A76). The start of the 1980s saw the introduction of the "B7xx" series of high fidelity components, which was in turn replaced by the B2xx series in the mid 1980s. The B2xx series was versatile (the B250 amplifier offering 10 signal inputs, each with automatic sensitivity calibration) and feature-rich, all components containing microprocessors. Contrastingly, the "H" line, with "H" standing for Human, went to the opposite extreme, with minimalist control interfaces: several "H" components having only three buttons.

In 1990 Willi Studer sold the Studer Revox Group to the Swiss company Motor-Columbus AG, including all subsidiary companies. In 1991, Motor-Columbus split the Studer Revox Group into Studer (Pro), Revox (HiFi) and a Manufacturing-division. Motor-Columbus sold several subsidiaries and plants. The extensive reorganization culminated in the sale of the Studer Group to Harman International Inc., in March 1994. The Revox Group was excluded and sold to private investors. On 17 March 1994 Harman International Industries completed its acquisition and acquired from Motor-Columbus AG 100% of Studer Revox AG. Harman paid 100 Swiss Francs (approximately US $70.00) for all of the issued and outstanding stock in Studer Revox. Harman assumed post-acquisition indebtedness of Studer Revox of approximately 23 million Swiss Francs (approximately US $16 million).

The founder of Revox, Willi Studer, died on 1 March 1996. The company logo is the word "REVOX" in capitals, with a "V" larger than the other letters; when printed in fixed-size type, the mixed-case spelling "ReVox" is sometimes used, but in all older and most newer references the name is shown as "Revox". Many consider ReVox open-reel tape recorders to be high-end audio equipment. The most famous of these are the G36 (valve type), A77 (solid state with relay controls) and B77 (solid state with logic control and direct-drive). The A700 was the top-of-the-line 1970s machine with 3-speed quartz PLL capstan, or, like the B77 which appeared in 1979, variable tape speed from 2.5 to 22.5 inches per second. Pictured to the right is the PR99 Mk2, a variant of the B77 for professional users, differing from the B77 in having balanced line in/out, and a real-time counter and auto-locator. The PR99 series was superseded by the C270 series, available also in multi-track formats (C274, C278). Robert Fripp used Revox machines to produce his Frippertronics recordings in the late 1970s onward, until he replaced the recorders with digital delays in the 1990s.

Cassette recorders, CD players, televisions Revox also produced well-regarded cassette tape recorders, notably the B710 and later the B215, which used the same transport and substantially the same electronics as the more expensive Studer A710 and Studer A721, respectively. It is worth noting that the Revox H11 and C115 cassette recorders are not true Revox or Studer products, but rebadged Philips Model FC60. As such, they do not meet the exacting performance standards of the B710, B215 and H1 which are Studer designed and built. In the same fashion, the Revox B225 and B226 compact disc players were very heavily based on the Studer A725 and A727 professional CD players. Likewise, the Revox FM tuners were almost identical to the Studer professional models. A limited run of the B226 CD player was issued to celebrate Studer's 40th anniversary. Dubbed 'The Signature', it featured a black faceplate (in contrast to the then silver (anodized aluminium) B226) and used the high performance Silver Crown version of the Philips TDA1541 DAC, which later featured in non-Signature B226-S versions. Revox was one of the first manufacturers to market a plasma television set, the model E542 in 1999. Before that, they commissioned Loewe to manufacture a limited number of models of S-VHS and VHS video cassette recorders and CRT television sets branded with the Revox name. A DVD player bearing the Revox name (model S27) was built by the French company Micromega.

Current technology

… excerpt ends here. Continue reading the full article.

Illustrations

Revox: ReVox corporate logo
ReVox corporate logo
Revox: Complete Hi-Fi system from 1977 with audio amplifier A750, synthesizer tuner B760 (middle) and reel to reel audio tape recorder B77 (top).
Complete Hi-Fi system from 1977 with audio amplifier A750, synthesizer tuner B760 (middle) and reel to reel audio tape recorder B77 (top).
Revox: Revox A77 (1967–1977)
Revox A77 (1967–1977)
Revox: Revox PR99 Mk II, a 1/4 inch tape recorder. Produced from about 1985.
Revox PR99 Mk II, a 1/4 inch tape recorder. Produced from about 1985.
Revox: Revox B790 Linear tracking record player (1977–1982)
Revox B790 Linear tracking record player (1977–1982)

Worked examples

Example 1 — a first encounter with Revox

Start with the simplest possible case. Write down what Revox claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Revox before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Revox ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Revox

In research
Revox appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Revox in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Revox is common in secondary-school and first-year university syllabi. It links to neighbouring topics Consumer electronics, Electronics companies of Switzerland, Music equipment manufacturers, so understanding it makes those chapters shorter.
In everyday life
Look for Revox outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Revox in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Revox means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Revox out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Revox in simple terms?

ReVox (on-logo styling REVOX) is a brand name, registered by Studer on 27 March 1951 for Swiss audio equipment. History The first Studer-designed tape recorders were branded Dynavox.

Why does Revox matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Revox?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Revox.

Tags

  • Consumer electronics
  • Electronics companies of Switzerland
  • Music equipment manufacturers
  • Regensdorf
  • Swiss brands

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