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Addax Sound Company 
Founded in 1995 in Northbrook, Illinois, USA. Sold mostly low end consumer audio products in the form of headphones, headsets and suchlike, also sold headphone components, audio connectors and wire assemblies, related electronic components and small speaker drivers but seems to have found most success as an OEM provider of headsets for multimedia purposes (the noise cancelling headsets IBM provided with OS/2 Warp 4 and Viavoice were bought from Addax for instance), although professional grade headsets were provided as well. Much of their product line appears to have been sourced from the Far East although the company had a assembly operation in the USA that could handle small runs. Was taken over by Koss on May the first, 2003 and it appears that the company was in some sort of trouble at the time since Koss only paid just under 20k shares of their own stock for the entire operation.
Adrian Acoustics
A hi-fi furniture company registered in New York but operating from West Haven and later Bridgeport in Connecticut, USA. Took over the business run by Adrian Cabinet Arts Corp. but focused on the manufacture of furniture rather than cabinets, aquired the Alón speaker line from Acarian Systems but appears to never have made the speakers. Founded in 2004 by Humberto Adrian and dissolved in 2011, business taken over by Adrian Lifestyles Furnishings.
Adrian Cabinet Arts Corp.
Company based in Queens, New York, USA and founded by Humberto Adrian in 1973. Althoug primarily a woodworking shop they got quite well known in the audio world for providing cabinetry for a number of high end loudspeaker design for NY based loudspeaker companies such as Advent, Dahlquist and Acarian Systems, in fact if you find you have speakers with the phrase Adrian Cabinets stamped on the inside this is the company that made them, cheaper cabinets were usually supplied by companies such as Stylemasters. The company moved to West Haven in Connecticut and was dissolved in 2004 with the production being taken over by Adrian Acoustics.
ADX See --> Analog Digital Technology
AEG See --> AEG
Agfa
Founded in 1867 as the Berlin branch of the Friedr. Bayer et comp. company which was a pioneering manufacturer of synthetic dyes better know today as just Bayer. The branch started to use the Agfa brand name for their photographic products in 1897 and was merged into I. G. Farben in 1926 along with the rest of Bayer and re-established as in independent operation in 1952, although fully owned by Bayer. Started manufacturing audio tape later that decade, merged with Belgian company Gevaert in 1964 to found Agfa - Gevaert, thereby creating one of the worlds biggest manufacturer of photographic products, and moved their headquarters from Germany to Mortsel in Belgium. A-G was one of the leaders in the development of audio tape especially in the late 60's and early 70's when they produced what was arguably the best professional open reel tape on the market and managed to seriously erode the market share of BASF, Ampex and 3M without a lot of publicity, but the company was also noticeable in particular for the stance they took on tape erosion.
In the early 80's it became apparent that large amounts of professional grade tapes manufactured in the preceding decades were becoming unplayable due to a number of factors mostly chemical instability in the ferrite layer (Agfa et al) or the tape itself had a tendency to hydrate (Ampex etc.), BASF had been aware of this problem for some time prior to this after doing research on tape lifetimes and had taken appropriate action but most other companies were caught unawares and some, noticeably Ampex, choose to ignore the issue altogether and even continued manufacturing the affected formulations. Agfa on the other hand started an R&D program that not only set out to ensure that new tapes had extended lifetimes but more importantly they developed chemical compounds that allowed you to play back tapes that otherwise were unplayable due to flaking, this meant that a number of classic albums were transferred to high quality masters in the 1980's that would otherwise only exist as duplication copies or even record transcripts. The company decided in the late 1980's to change direction from media supply to media technologies and sold the magnetic recording division to BASF in 1990. The more interesting tape formulations and/or updated variations thereof are still available from RMGI. -- Official homepage.
Agon AS
Norwegian company based in Lysaker, in the municipality of Bćrum, that is basically an Oslo suburb these days. Founded by brothers Eigil & Geir Spiten in 1986 as an electronics importer and distributor. Was by the mid 90’s starting to expand their distribution network slightly into Sweden and Iceland and in 1996 started to sell primarily Asian sourced budget televisions and video recorders under their own Elfunk brand, in 2006 they expanded the range of televisions greatly as their Asian suppliers got into the LCD game in a big way and the company had its biggest year with a turnover of 172 million NEK.
The year after however the company starts to lose some of their imported brands, their website stops being updated and by 2010 they are no more, but we have actually not been able to find out what happened.
Ahrens Audio
Based in Freigericht, in Hessen, Germany. Run by and named after husband and wife team of Christine & Lothar Ahrens and operated as a dealer in vintage audio and parts, was well known in the latter half of the 90’s especially for having large stocks of hard to find NOS thermionic valves and was one of the first such dealers to take advantage of the internet and E-Bay when it came to sales of vintage hi-fi but apparently had been trading in one form or another since 1980 or thereabouts.
Introduced a line of valve based amplifiers in late 2001 that included a stereo integrated plus 3 monoblocks, the biggest of which was the Ba-amp model I that had no less than 30 valves, all of their models took advantage of the owners stocks of NOS valves with them being built out of primarily vintage AEG models which set them apart from the usual. By 2004 the company had some financial problems apparently due to the split-up of Christine & Lothar, with Lothar running the business on his own after that, there followed complaints about non-shipments of pre-paid orders, the company lost their E-Bay account presumably for the same reasons and their website disappeared for a time, in 2005 the website re-appeared and the company again started selling on E-Bay under new user names, but they were taken down one after another and there were persistent complaints on audio discussion groups during the following year with allegations of non-shipments and even outright fraud and the company disappears altogether in 2007. The manufacture of amplifiers appears to have stopped in late 2003 or early 2004 and as far as we know the re-started company never shipped any new amps despite claiming to be able to do so.
Aireon Manufacturing Corporation
Founded in 1937 in Kansas City, USA by Randolph C. Walker as the Aircraft Accessory Corporation and did during the war years manufacture radar systems and radio related products for the U.S.A. armed forces. The company had by 1946 changed its name to Aireon and gained ownership of a number of electronic component manufacturers including Cinaudagraph Speakers and the Lewis Electronics valve manufacturer, later that same year the company diversified by entering the then booming market for record jukeboxes, their first products in that market was the high end Aireon Super-Deluxe but it was popularly known as the Airliner due to it being the biggest such product on the market. Aireon had banked on the consumer market taking over when contracts with the army ran out at the end of the war, in anticipation of this they had introduced a number of radio related products intended both for the ham radio market and 2 way radios and suchlike intended for the consumer market but neither product line sold in any volume and the company went bankrupt in September 1946. A company called Reconstruction Finance Corporation bought the company and restarted production of jukeboxes and ham radio products but by 1949 production of jukeboxes was halted. The electronic components part of the Aireon operation appears to have been taken over by the Consolidated Group but it is not clear if they did after the bankruptcy of the original company or if that was something that happened later, the manufacture of ham radio products survived into the mid 1950s as a company called PrePro.
Albert Ebner & Co. (AECO)
A firm started in 1919 in Bad Cannstatt, Germany by an engineer of the same name. Although the company initially made a variety of electric and mechanical products they are notable for the manufacture of the first practical electric motor designed especially for turntables later that same year. Taken over by Electromophon in 1921, but after that company had failed in early 1931 Hr. Ebner started AECO that continued the manufacture of high end gramophones and indeed pioneered the use of electric transducers. Hr. Ebner married Hermine Steidinger in 1936, but she was the daughter of Perpetuum founder Joseph Steidinger and one of the main owners of that company, shortly thereafter AECO was merged into the Perpetuum company which became Perpetuum-Ebner and Hr. Ebner became it's CEO. More info on this page (in German).
Alchemist Products
Formed in 1989 by Glen Gale and based in Muswell Hill, London, England. Initially manufactured high end amplifiers designed by Mr. Gale but later branched into the digital market with CD Players, transports and DACs. Went out of business in 2001.
Aleša Vaic Vacuum Technology (AVVT) 
This was a Czech company originally based in Praha and owned by Aleša Vaic that started manufacturing thermionic valves in 1989 that were sold under the name of Vaic-Valve and also bought NOS valves in East Europe and sold them to retailers in the west. Mr Vaic had bought the remains of tooling of the old Philips Prague factory, it had been nationalised in 1948 and bought under the control of Teslar who had used it as a prototyping factory and when the design group was closed down in 1989 the equipment was sold to Mr. Vaic and he also rented the space from the company and later hired 4 of the former employees of the design group.
The prototyping nature of the equipment that the plant had was both a blessing and curse, it meant that the company could not really compete with other makers in producing common valves but on the other hand they could easily manufacture specialised tubes and small production runs, and the use of handmade glass meant that the company could supply replacements for Telefunken valves but these were made using a much higher vacuum than other valves, it also meant that the valves could be a bit more fragile and prone to shipping damage than the mass produced ones. The first products from the company were indeed specialised valves including models that had not been manufactured since the 1920's such as copies of the Marconi I intended to service the radio hobby market and other obscure market sectors and were marked V. V..
In 1992 Mr. Vaic met the late Riccardo Kron in Germany where the former was selling his own products and NOS East European valves at a radio swap meet to local enthusiasts, Mr. Kron was an Italian businessman with connections in the USA and Switzerland and came up with the idea of manufacturing an improved version of the 300B power triode to sell to the audiophile market, initially Mr. Vaic was interested but simply lacked the finance for such an undertaking since the 300B is difficult to build and an improved hand built version would be even more complex. In 1993 Mr. Kron made a deal with Mr. Vaic and with partially his own money but mainly with funding from an unknown Switzerland based group agreed to finance the design and building of the 300B against a security in the company’s tooling.
The valve was designed by Mr. Vaic and his team, and by 1994 was ready for serial production, the V.V. version of the 300B was called Vaic VV30B and was definitely better than anything else 300B related on the market and could yield more power but it was also much more complex and thus more expensive, with a normal 300B already expensive to begin with. Mr. Krons founded a company called KR Enterprise S.R.O. with financing from Switzerland to sell the valves but the marketing efforts of KR in the USA and southern Europe came to very little in the first year, so to control cost in the face of quickly rising wages and rent cost in the mid 90’s Prague Mr. Vaic decided to move the factory to Rožnov pod RadhoŠtěm where cheaper housing and wages made the small specialist radio valve supplier a more viable proposition, most of the tooling went with the company but a few of the machine’s ended up with the former purchase manager of the company called Anton Schönfeld in what appears to be in lieu of a layoff payment, but alongside Mr. Schönfeld most of the other staff understandingly enough declined to move to RadhoŠtěm, which is on the border with Slovakia or as far as you can get away from Praha and still be in the Czech republic..
Alesis See --> Alesis Corp.
Alex. Eymann Apparatebau
A company based in Ostermundigen, Switzerland run by one Alex Eymann (or Alexander ?) that apparently made high quality products for the broadcast industry. We have seen a phono preamplifier from the 70's that this company made but have found very little further info.
All Channel Products
USA based manufacturer of indoor television antennas and suchlike, mostly sold using the Rembrandt trademark. Ceased trading in 1989 and their product line and trademarks taken over by Recoton later that year.
Allgemeine Elektrizitaets-Gesellschaft (AEG)
Founded in Berlin, Germany in 1883 by Emil Rathenau as the Deutsche Edison Gesellschaft initially to manufacture light bulbs under license from the Edison Company and in 1895 started the manufacture of other Edison products, noticeably phonographic equipment and in the same year they started recording local artists, the DEG name would translate as The German Edison Company BTW. The company changed its name Allgemeine Elektrizitaets-Gesellschaft (General Electrical Company) in 1887 and started to manufacture products designed in-house in 1889 with a series of products based on electric heating elements. AEG saw phenomenal growth in the first decade of the 20th century and became a pioneering manufacturer in a number of fields, noticeably it was the worlds first manufacturing company to employ an industrial designer in the form of legendary architect Peter Behrens, but in 1907 he was hired initially to design the AEG main factory but ended up designing a number of consumer products in conjunction with the company's engineers.
In 1903 the company founded Telefunken in association with Siemens but both companies had a number of communication related patents and licensed a number of others as well, but these were so extensive that it was thought that it would be difficult for either company to develop radio related technologies without extensive cross licensing, and in the end it would be easier to form a new company that pooled all patents from both companies. Telefunken was an big success and as far as technology goes probably made more contribution to advances is sound, video and communications than any other during the 20th century, however the original founding contract of Telefunken stipulated that neither Siemens nor AEG could introduce communications equipment of any sort (that included radio and audio products) and all development inside the companies had thus to be handed over to Telefunken for further dev. or manufacture. This did through the years cause some friction in both companies, but particularly in Siemens which had an continuing interest in entering the radio market especially in the boom years of the 1930's, so in 1941 AEG bought Siemens shares in Telefunken.
Telefunken was run as a separate company fur a number of years afterwards, although it was eventually changed into a division of AEG and finally incorporated in the 1980's. This causes some historians problems, there is a tendency to attribute inventions and products to AEG that were originally either Telefunken products or even Siemens technologies, but in reality it is not possible to refer to Telefunken products as AEG until the early 50's at the earliest. AEG hit financial problems in the late 70's and was bought off by Daimler Benz in 1982 and they closed off most of the AV production and research divisions. More recently Daimler has been selling off some of the older AEG divisions and with them the rights to the name, the white goods division has been sold to Electrolux, the Belgian division has been taken over by its management team and is now known as AEG Belgium etc..
Alón See --> Acarian Systems
Alpha Digital Technologies See --> Tara Labs
Altec Lansing See --> MicroAudio (Equalisers 1990's) or Altec Lansing (Pro-audio 2001 to 2006 and consumer audio 2000 to current)
Altis Audio Ltd.
USA based digital audio specialist run by Howard Mandel and Bill Harris, operating from Newtown, Connecticut, USA. Primarily manufactured high end CD players and transports along with digital to analogue converters that utilise tube filtering but introduced a video switching device in 2000 and changed their name to Altis Audio & Video with further expansion into the AV market in mind. Sadly Mr. Mandel the main owner of the company passed away in Sept. 2001 and while the company initially stated that they would continue operating as before they sold the manufacturing rights to the video processor to ESI Electronics in late 2001 and offered the rights to the name and audio products in early 2002, but since their website was taken over by a cybersquatter in May 2003 it is probably safe to assume that no one took them up on that offer. It has been heard that a former employee of the company offers repairs and upgrades to at the least some of their products but we have been unable to procure his name or contact details.
Alto
A brand launched by Taiwanese pro-audio manufacturer Seikaku in 2002 and used by them to label on one hand car audio products using the Alto Mobile variation and on the other hand semi-pro and professional audio products such as small mixers, amplifiers and portable PA systems using the Alto Professional sticker.
It was always made clear on the Alto Mobile promotional materials that the brand and its products where owned and made by Seikaku in Taiwan and China and initially the pro range displayed Seikaku as the contact detail with design having been performed in Italy, the Netherlands, the UK, USA, and Taiwan. By 2005 the car audio products from the company had been discontinued and the professional division branded itself as just “Alto”, however all references to Seikaku and Taiwan had been removed from the website and promotional materials and the company was presented as an Italian company with production facilities in China and Gian Piero Staffa put forward as founder and president. All development and DSP coding was also said to have happened in Italy, that was even though some Alto products had been sold under the Show brand before the founding of the Alto brand and the only DSP products we could find originating in Italy were amplifier modules actually bought from Powersoft. By 2007 Mr. Staffa had left to work for Behringer and while Alto products kept on being sold there was seriously diminished marketing effort present from then onwards and in the end Seikaku sold the Alto brand to Numark in January 2011.
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