AKG manufactures or has manufactured the following equipment (click to expand models list):Cables
AKG web site (December 12, 2003): Company Mission AKG products translate sounds as encountered in the world of nature, speech and music into the signals used by the world of audio and communication electronics, and vice versa.Perfectly at home in both worlds, AKG engineers use their unique expertise, knowledge, and innovative spirit to creat products that combine advanced engineering with manufacturing excellence at the highest level of audio performance and quality.
The Spirit of the Company: Understanding requires hearing and listening and having an open mind beyond all cultural, religious and regional barriers.
AKG recognizes the individual needs of its customers, providing them with innovative solutions combined with state of the art production technology.
Imorama (February 2003): All models listed in AKG page except for K340 are "pure-dynamic" phones. AKG had made only three models of electret phones, and all of them were "2-way system (electrostatic-dynamic)". The models were K340 (started 1978), K4 (started 1982) and K145 (started 1984).
There are two variations of K340's headband. Original type has four sunken lines on upper side. Another has only two lines but lettered as "AKG". See the pictures in the Pictures section. Sincerely, Imorama
AKG web site (December 9, 2003):
1945 Dr. Rudolf Goerike and Ing. Ernst Pless start their first joint project: supplying Vienna movie theaters with film projectors and loudspeakers. The envisaged company name is"Phonophot". The company buys film equipment from a closed factory in Hungary. Dr. Goerike makes the necessary modifications such as reducing projector noise and optimizing the optical soundtrack. The PC 2535 G horn-loaded loudspeaker with cardboard diaphragm for movie theaters is manufactured in a living room. Frequency range: 40 to 12,000 Hz, diaphragm diameter: 14 inches, weight: 45 lbs. The magnets are from Goerz and have an induction of 14 kG.
1946 The DYN Series is designed. These are the first dynamic microphones from AKG for vocals and instruments. The "Dyn" Series includes models Dyn 60, Dyn 60G, Dyn 60K, Dyn 60K-Studio, etc., each one styled individually. All parts are hand made. Annual output is 500 to 600 units.
1947 Dr. Rudolf Goerike and Ing. Ernst Pless establish AKG Akustische u. Kino-Geraete Gesellschaft m.b.H. The trading license issued on June 3, 1946 describes the company as an establishment for "the manufacture of audio and film equipment" located at Nobilegasse in the 15th district of Vienna. AKG offers the first condenser tube microphone, the C 1. Only six units are made, and one user is Wien Film Studios. The diaphragm is made from Styroflex foil gold sputtered by Goerz. In the same year, AKG sells one C 1 to South America. The capsule is a predecessor of the CK 12 that later becomes an AKG legend.
1949 The first AKG headphones on the market are called the K 120 Dyn. (not related to the later model K 120). The headphones use a "Trolitul" diaphragm from pressed granules because foils are not available at the time. The factory has only one winding machine and one gluing machine. Other AKG products of the time include carbon capsules for telephones and gooseneck microphones derived from the Dyn 60.
AKG products are distributed in Austria by Siemens (WSW), export sales already include significant business with eastern European countries.
1950 AKG starts designing the world's first high quality dynamic microphone, the D 12 with its patented "mass-loaded tube". Models derived from it in later years include the D 20, D 25 (1958), D 30 (1958), D 36, D 45 (1959). The last three models use two transducers to provide selectable polar patterns. Experiments for building condenser microphones with a collodion diaphragm. AKG makes special automobile horns because the small motorbikes of the day are so loud that motorists could not hear standard automobile horns. In addition, AKG makes exposure meters.
1951 Dummy head for measurement use. Two prototypes with condenser capsules are built for Hungary. Simultaneously, a condenser transducer is designed which is later used in the capsule of the C 28. Also, a dual-diaphragm microphone is developed and called the "C 2". About 500 units are made. The "Rapido" flash is designed. At this time AKG developed film soundtrack pickups in cooperation with Siemens Austria. Another new product is the heart tone microphone based on the Dyn 60, a dynamic vibration pickup called "Dyn 2x60/180". Another curious electromedical product from AKG is impossible to date exactly for lack of information. The only clue is telephone numbers made up of letters and numbers: Austrian telephone numbers were changed to numbers only in the mid-1950s.
1952With the ambitious goal of establishing a proprietary studio connector standard, AKG created the "AKG Connector". The breakthrough, however, never came and the last connectors were made in the mid-1960s. They can still be found today in some old installations, e.g. in churches. They are a much sought-after collector's item even today. One of the first AKG legends is nearing its breakthrough: the D 12, a large-diaphragm microphone that not only provides the first true cardioid polar pattern but introduces engineering innovations such as the mass-loaded tube and deep-drawn diaphragms. Film sound engineers too praise the directivity and remarkably low susceptibility to wind noise.
1953 The D 12 conquers the market and large-scale production of it begins. The same year also sees the birth of another legendary AKG product: the C 12, the first remote controlled multipattern capacitor microphone. The C 12 was originally made in runs of 50 units per month and became an international bestseller. It was purchased by almost all large radio and recording studios. First customers included BBC London whose engineers were deeply impressed with the microphone's styling and quality.
1954 Underwater loudspeakers and microphones (Dyn 120 UWS) are developed, the latter derived from the Dyn 60K. The specifications are impressive: Watertight down to 330 ft. at a diving rate of 25 ft./minute; frequency range 30 to 20,000 Hz; sensitivity 0.2 mV/microbar; seawater-proof, chrome plated brass case; weight 15 lbs.; size: 9.8 x 5.5 dia. in. The total output of 20 units was sold to scientists and port authorities. Hans Hass uses a Dyn 120 UWS in shooting his first underwater sound movie, "Abenteuer im Roten Meer" (Adventures in the Red Sea) which won first prize at the "Biennale" bi-annual film festival at Venice, Italy.
1955 The first postwar Salzburg Festival uses AKG microphones. A unidirectional microphone is specifically designed for Herbert von Karajan. Unlike in his later years, Karajan rejected all audio equipment. When he conducted a performance, he allowed no microphones to be visible to the audience. So AKG had to design a special shotgun microphone that could be set up far from the musicians, in the wings or in the orchestra pit. Foundation of the German subsidiary, AKG Munich. D 36: the world`s first dynamic microphone with remotely selectable polar patterns. C 28: A small-diaphragm condenser microphone.
1956 D 11: unidirectional dynamic microphone for amateur tape recordists. Introduction of professional cardioid microphones with adjustable rear sound entries for reduced proximity effect (D 24, D 19). Introduction of the Dyn 200 Series of dynamic microphones including gooseneck models and M 410, M 411 OEM microphones for Telefunken. The east block business grows significantly.
1957 Worldwide distribution network, varied product range, many patents. AKG buys a building on Schanzstrasse in Vienna's 15th district, which remains AKG's property until 1992. The "sheet metal capsule", a dynamic capsule in a tight sheet-metal case, is developed and used over the following years in many AKG microphones including the D 9, D 11, and D 14 as well as OEM microphones for Saba, Körting, Telefunken, Stuzzi, and Eumig.
1958 D 15: first dynamic reporters' microphone with a tight unidirectional pattern. D 25: shock mounted, unidrectional dynamic microphone for use on a fishpole in radio, TV, and film work. D 30: first dynamic studio microphone with four selectable polar patterns.
1959 World`s first supraaural, open-back, lightweight headphones (K 50) with superior sound quality, produced in large quantities over the following years. D 45 - as D 30, except with shock mount and remotely selectable polar patterns.
1960 AKG designs and manufactures for Telefunken the ELA M 250 and ELA M 251, two extremely rare thus much sought-after collector's items.
Rerun of the C 12 and several other versions for Telefunken and Siemens using the then advanced GE 6072 double triode.
Design of the first professional small-diaphragm condenser microphone with miniature tube (Nuvistor), the AKG C 60.
1960/61 AKG establishes its own Domestic Sales department for Austria. The C 26 and C 30 capacitor microphones are developed further into the C 60 with Nuvistor miniature tube (the name is derived from "nueva vista" -- a new vision). First modular capacitor microphone system with CK 28 and CK 29. First experiments with spring reverb systems.
1962 An analog computer is built for simulating acoustical networks using electrical equivalent circuits of mechanical systems. A V-shaped dual microphone for interviewing (ENG) use is built and later continued by another company that even applies for a patent assigned by one Mr. Hagopian. The C 12 A Nuvistor condenser microphone is developed as a predecessor of today's C 414.
1963 The DX 11 reverb microphone is an innovative idea which, however, is not accepted by the market. This is one of the few flops in AKG's history of success.
1964 K 58: first lightweight headset derived from the K 50 headphones. The headsets were used by commentators at the Winter Olympics in Innsbruck, Austria, where most audio equipment came from AKG. But the hour of triumph turned into a nightmare as the opening speech (picked up by an AKG microphone) remained totally inaudible. The AKG engineers panicked but the defect was found quickly. It had begun to thaw and snow water had penetrated into the connection between two of the extremely long cables. Moments later, the excellent AKG sound quality was restored. A capacitor microphone with an RF type signal converter called the C 601 is developed. Due to electrical stability problems, the microphone never reached the production stage and the development is canceled in 1968.
1965 This is a turning point in the history of AKG and a new course is plotted for the future. The rapid spreading of TV kills many movie theaters. AKG responds by discontinuing optical equipment and concentrating exclusively on designing and manufacturing audio transducers. AKG introduces the K 60 "humanized" hi-fi headphones whose frequency response matches human hearing characteristics. Dr. Goerike designs a loudspeaker with a flat Styrofoam diaphragm which is later made by Yamaha under license.
1966 World's first wide-band ultrasonic transducer (CK 40).The design of the world's first two-way cardioid microphone D 202 provides a response that almost equals that of capacitor microphones. In addition, its proximity effect is almost zero compared to that of conventional directional microphones. AKG for the first time uses its proprietary sintered cap.
1968 A smaller version of the D 202 is launched, the D 222 dynamic microphone using a patented two-way transducer for extended frequency response and minimal proximity effect. It soon becomes the most popular reporting and speech microphone and remains a bestseller for decades. After the D 12, the first true performance microphone in what is revolutionary styling at the time is developed: the D 1000 (originally in gold). The most important feature at the time is that "it will not hide the face of the artist". Parabolic reflectors for microphones are made in cooperation with a sheet-metal working company, mainly for recording bird calls. An AKG subsidiary is established in Zurich, Switzerland. The "CMS" modular capacitor microphone system with the C 451 with FET preamp and CK 1, CK 2, etc. is developed and later becomes famous all over the world. After initial problems have been solved, it strengthens AKG's monopoly with BBC. The capsules originally had embossed metal diaphragms that were susceptible to humidity and therefore later replaced with plastic diaphragms.
1969 Foundation of the British subsidiary, AKG London. New headphones with "SCS - Subjective Controlled Sound" are designed and called K 180. The speakers can be repositioned within the earcups to provide different "acoustics". OEM business is expanded.
1970 Experimental telephone transducers are made. The original capacitor capsules are soon replaced with dynamic designs for better stability. Total sales of AKG Vienna to third parties reach ATS 199 million this year. The C 412, a solid-state version of the C 12 A with three polar patterns and a preattenuation pad selectable on the microphone is designed. After 8 years of intensive study of mechanical reverberators (helical springs and other mechanical vibrating bodies), the BX 20, the world's first, truly portable studio reverberator is ready for production. The spring reverb system design was practically finished and it took almost another year to design an appropriate suspension for it that would allow for safe shipping.
1972 AKG moves into the building at Brunhildengasse 1 formerly owned by the Bally shoe manufacturers. Marketing of the first digital delay, the TDU 7202 bought from Lyrec, begins. A special stamp by the British Post Office commemorating the 50th anniversary of the BBC shows historical microphones along with AKG models from the AKG catalog. Grado phono cartridges are distributed under the designations AKG PU 2, PU 3, and PU 4, the latter suitable for CD 4 quadraphony. AKG starts design work for a new cartridge technology, the patented AKG Moving Iron System. The C 24 is relaunched as the C 24 Comb large-diaphragm stereo capacitor microphone with separately, remotely selectable polar patterns for each channel.
1973 The AKG Lab gets its first computer. The first production runs of electret microphones are made. The first AKG dummy head microphone, made by AKG Munich, is used for head related stereo (binaural) recording.
1974 The DKK 32 design dramatically improves headphone frequency response. The K 140 "integrated open" headphones are developed and made in enormous quantities. The 100th Distribution is established and the 1000th patent granted.
1975 The K 240 headphones with 6 passive diaphragms per channel for improved bass response and imaging is developed. The D 140 is a small, top quality dynamic studio microphone with virtually no competition at the time. The BX 10, a smaller version of the BX 20, is designed, primarily for use in O/B vans. The SM 2006 portable mixer is designed. In cooperation with Koerting of Germany, the first wireless AKG headphones based on the K 140 is created, the AKG K 140 Libero. After initial experiments with ultrasound transmission, the designers decide to use infrared light because it is less susceptible to interference. The system does not sell because most customers find it too complex and prefer the familiar hardwire headphones.
1976 AKG begins to make its own phono cartridges P 6R, P 6E, P 7E, P 8E, later on the P 8ES, with the revolutionary TS knife-edge bearing for better imaging. AKG has 105 Representatives worldwide, total sales are ATS 350 million. Mr. Cooper of AKG London tries to design a special mixer for speech recording but fails. The first international product concept meeting is held in Vienna attended by AKG Representatives from all over the world with the aim of creating new product concepts and product lines. One of the results is a fundamental restructuring of the company and the introduction of matrix organization.
1977 Sales are increased by another 10%. 30% of total sales come from Germany. The OEM proportion is 40%, AKG has 800 employees and makes 20,000 microphones a week. A new compact reverberation unit (BX 5) is launched. C 414 EB: first C 414 version with improved circuitry and integrated XLR connector. Cofounder Ing. Ernst Pless leaves AKG. The C 303 line level microphone with built-in compressor and headphone monitor amplifier for the newly created ORF regional TV stations is designed and made in small runs. The C 414 is retouched again, specifically the housing, and fitted with an XLR connector. The designation is changed to C 414 EB.
1978 The first true vocal microphone line is developed. Originally planned as "Alpha", "Beta", and "Gamma", they are later renamed D 310, D 320, and D 330. The first endorsement contracts are concluded with Jon Hiseman, Roger Whittaker, and other artists. World`s first two -way headphones from AKG combine dynamic and electrostatic speakers for the first time (K 340).
1979 AKG steps into the lion's den by founding a subsidiary in Japan. World firsts: TDU 7000 modular digital time delay unit; vocal microphones combining extreme ruggedness with studio grade sound quality (D 300 Series). C 422 eb: large diaphragm stereo condenser microphone with advanced solid-state electronics. And this year sees the first issue of "AKG Report", a totally hand made publication with a circulation of 1000, which gives all AKG employees and associates worldwide an overview of the events of the year.
1981 The new BX 25 ED digital/analog reverberation unit combines analog reverb and digitally generated delay and early reflections.
1982 The compact headphones line comprising the K 1, K 2, K 3, and K 4 provides all the features of "big" headphones. In spite of their high-end quality, they do not sell. Hi-fi enthusiasts simply want "big cans" for their money. The folding K 1 at least make a splash worldwide.
1983 New CMS system comprising a C 460 electronic preamp and CK 61, CK 62, and CK 63 capsules also includes remote capsules CK 1 X, CK 2 X that can be connected to the preamp with cables up to 200 ft. long. The AKG Tube: Black market prices for C 12 microphones skyrocket. Responding to the market situation, AKG makes the first re-run of a large-diaphragm tube microphone using the same 6072 tube as the original C 12. Falco (of "Amadeus" fame) with the most spectacular new AKG product of the early 80s.
1984 AKG goes public. AKG Holding AG is established and holds 75% of AKG GesmbH. Golden Microphone (AKG C 535) for Frank Sinatra. Introduction of the ULS Series microphones designed specifically to meet the stringent requirements of digital audio in the recording studio.
1985 Foundation of the 100% US subsidiary in Connecticut.
1986 Acquisition of Boston based Ursa Major, transformed into the Digital Products Division of AKG Acoustics. The first product by the new Division is the ADR 68K. Introduction of the C 1000, the world's first condenser stage microphone with a convertible polar pattern and alternative phantom or 9 V battery powering. The C 414 B-ULS launched in that year is the first C 414 version using ULS circuitry.
1987 Introduction of the "K 280 Parabolic" headphones with "acoustic lenses"; a completely new listening experience stuns hi-fi experts. Presentation of the DSP 610M Delta Processor for the "Delta Stereophony" sound systems.
1988 Introduction of the MicroMic Series miniature clip-on microphones. They allow the number of microphones cluttering the stage to be significantly reduced. C 747 Comb: the first high quality pen-size microphone whose specifications meet professional requirements. "AKG Acoustics (India) Ltd." established. AKG Vienna mourns for cofounder Ing. Ernst Pless who died unexpectedly.
1989 The internal publication, "AKG International Report" is published again. The first issue appears at the beginning of the year. There is no lack of controversial articles. AKG intensifies its expansion policy. Acquisition of Orban (May 1989) and dbx Professional Products (October 1989); the factory in India is opened and starts production; "AKG Acoustics (India) Ltd." is admitted to Indian stock exchanges. Spectacular presentation of the K 1000: this head speaker system for advanced binaural reproduction conquers the hearts of hi-fi purists and studio pros. The presentation of the "CAP 340 M" Creative Audio Processor for room simulation and binaural reproduction creates a worldwide splash. Another product by the Digital Division, the DSE 7000 Digital Sound Editor, is a surprisingly simple solution to the problem of quickly editing short radio news items and jingles.
1990 IXT transducers for telephones are developed and manufactured. Development of a compact version of the CAP 340 M for the "Audimir" space research mission. Merger of SCJ and AKG Japan. AKG acquires 62% of the UK based Edge Technology Group with its subsidiaries BSS Audio Ltd., Turbosound Ltd., Precision Devices Ltd.
1991 A 20% stake in the German company CeoTronics is acquired. A 30% interest in AMEK Technology Group PLC (UK), the holding company that owns AMEK Systems & Controls Ltd., and TAC Total Audio Concepts Ltd. A new Product Line of Integrated Handsets (IHA) for telephones is introduced. Foundation of "AKG Communications France". AKG takes to the stars: The "Audimir" space project uses AKG products for room simulation in outer space. This demonstration of advanced binaural technology creates sufficient demand to warrant the design of a consumer version of this system. Introduction of Wireless Microphone Systems WMS 900 and WMS 100. Introduction of a new generation of headphones called the "K Series".
1992 The Audiosphere BAP 1000 Binaural Audio Processor for Individual Virtual Acoustics is launched. Introduction of the ergonomically shaped, triangular-section Tri-Power Series dynamic musicians' microphones and the AKG Blue Line Series modular microphone system. AKG introduces the C 547 boundary microphone and C 621, C 647 "slim-line" gooseneck microphones for stage and sound system use. IXT telecom transducers are replaced with the new IXR transducers. Introduction of the Q 400 handsfree microphone for car telephones. Strategic alliance with Lectrosonics for the worldwide distribution except for the US and Canada of Lectrosonics products complementing the AKG sound system product line. AKG increases its holdings in AKG India and Edge Technology Group/UK to 51% and 84,56% respectively. The expansion of Production causes a space problem. AKG Vienna operates three locations within Vienna and they are becoming more and more crammed. AKG decides to move to a single location and start construction on the outskirts of Vienna.
1993 Introduction of the "Tri Power C-Series". C 414 B-TL II: dedicated version of the C 414 B-ULS for vocal use. First wing of the new factory building is completed. All production-related departments move to the new location. Introduction of more "K Series" headphones into the consumer electronics market. Harman International Industries Inc. becomes the new majority owner of AKG GesmbH. AKG Holding AG leaves the Vienna stock exchange as AKG Holding AG is wound up. Holdings in CeoTronics and AKG France are sold.
1994 AKG founder Dr. Rudolf Goerike dies. As AKG sales rise, Harman purchases the remaining shares. From now on, AKG is a 100% Harman International Company. AKG completes its move to the new location at the 23rd district of Vienna. AKG Vienna takes over Marketing and Distribution of Studer Austria whose head office relocates to the new AKG building. The wireless microphone line is extended with fast moving products used, e.g. by Rod Stewart or Peter Gabriel on their tours.
1995 Introduction of the world's smallest dual-diaphragm system in the world, the CK 77/C 577 - big in sound, smaller than a thumbnail in size, specifically designed for theater, TV and film uses. Introduction of the Performer Series, affordable microphones for Karaoke, home-recording, and emerging musicians. The "K 290 Surround" surround sound headphones are introduced. New "EARgonomic" infrared headphones K 444 IR, K 333 IR are launched. Forte installs AKG earphones in its virtual reality helmets. Introduction of IHA 90 integrated handset for computer communication. Mini headsets for telephone and PC communication use open up new market segments. The C 12 VR is honored with the "Tec Award" by the US Mix Foundation. World famous British rock group "Simply Red" becomes an AKG endorser.
1996 Introduction of the WMS 300 UHF wireless microphone system. Introduction of the WMS 51 VHF wireless system. The new MicroMic Series II, a new generation of clip-on microphones for instrument and vocal uses, are introduced. Introduction of HSC 100 ("Mini-Elf") and HSC 150 ("City-Elf") miniature headsets for intercom, PC and telecom applications. AKG applies for a patent for the Varimotion System, a new diaphragm type divided into various zones of different thickness for better overall response. The new K Series headphones comprising the K 301 and the Varimotion models K 401 and K 501 are launched. Introduction of "K 205 UHF" RF headphones. Emotion Series performance microphones with Varimotion System are launched and become hot sellers right away.
1997 Introduction of the SolidTube which makes the legendary AKG tube technology available at an attractive price! New UHF Headphones K 305 and k-405. New Infrared Headphones K 211 and 311 IR. PC Acoustics Series - a wide range of microphones, headphones, headsets for PC communication. AKG IVM 1 In-ear Monitor System using IVA Technology. AKG Wireless Mics on the "Artic Northeast" Project of the Austrian Broadcasting Company - best performance at lowest temperatures!
1998 The year of the Hearo 777: IVA technology for optimum surround sound experience. AKG WMS - multi-channel wireless microphone system. HSC 200 SR Headset. Modular Discreet Acoustics Series for Conferencing. C 1000 S - new improved version in AKG's new "Silver Look". K 55, K 66 - big headphones with a small price tag. UHF headphones with autotuning: K 355 UHF and K 455 UHF. Maximum mobility with the WLS 6060 MAX: powered speaker with integrated battery for wireless P.A. use sets a new standard. Introduction of the CS 1 conference system. The greatest operatic event of the Century takes place in Beijing/China; "Turandot" performance took place in the Forbidden City. AKG was the sole microphone provider: WMS 900 and about 100 top models of the AKG microphone range.
1999 Introduction of the C 4000 B the world's first dual large-diaphragm system. WMS 80, WMS 61, WMS 81 wireless microphone systems bring new sounds for a wireless world. New Hearo Series: Hearo 777 Surround, and the digital models Hearo 888 Titan and Hearo 999 Audiosphere for the optimum surround sound listening experience. K 105 UHF with mini transmitter. K 44: another big headphones with small price tag. C 3000 B: update of the proven C 3000. C 444 L: headset type microphone. CK 77 WR: water resistant and perspiration proof version brings another breakthrough. Premiere at the most technically advanced open air opera performance of all time: "Un ballo in maschera" by Giuseppe Verdi at the annual lakeside opera festival in Bregenz. AKG microphones at the Jazz Festival Vienna (Jazz Fest Wien). Renovated halls of Wiener Konzerthaus use AKG equipment exclusively. First performance of Peter Wolf's symphony "Progression" featuring SolidTube, C 414's, C 480's for the orchestra. Remix of Caruso's voice with Hearo 777s.
2000 C 3000 B receives M.I.P.A. 2000 (Musikmesse International Press Award). 25 international audio magazines voted for the large-diaphragm microphone. Launch of the C 2000 B - patented small capsule technology. Launch of PR 81 Diversity Bodypack Receiver. WMS 40 UHF system combining professional quality and exceptional cost efficiency. Re-launch of AKG Emotion Series with three new models added. CS 1 Conference System also used in broadcasting stations. Famous Bill Schnee becomes AKG Endorsee. Launch of C 4500 B-BC Broadcasting Condenser Microphone. Launch of C 477 WR - headset version of the waterproof CK 77 WR, tested at the Bregenzer Seefestspiele - the lakeshore festival.
2001 AKG builds new R&D Wing - floor space increases by 3,500 m2. "The Cube" is one of Europe's most advanced acoustic test chamber.
C 3000 B becomes reference for Roland COSM microphone modeling.
Endorsement Savage Garden.
Introduction of new products:
WMS 40 PT
MicroMic Series III, comprising four new models
Goosenecks GN 15 ES, 30 ES, 50 ES, GN 155 set, GN 15 HT wireless module
K 105 SRS UHF with Surround Sound Effects
HEARO 777 Quadra/Quadra de Luxe: world's first headphones using Logic7 technology
K 240 Studio/K 141 Studio using XXL transducers
C 451 B - new version of former C 451's
C 900 - condenser Emotion Series microphone