THE OPTIMIZATION TASK FOR THE AN COBRA was important because the design represents a new generation of AN products, it was a part of a today’s better known Tonmeister Strategy. The power supply uses silicon diodes in a voltage doubler configuration and is choke filtered, using another in-house designed and produced component specific to the Cobra. This material has a warm, natural character which complements the valves and topology. The mains transformer is also an in-house design, optimized for the Cobra's circuitry, and is fitted with our heat-treated, non-oriented silicon steel laminations. C Cores provide higher primary inductance and power handling, together with lower distortion compared to a stack of laminations of the same size. The output transformers are in-house designed and manufactured and fitted with our IHiB C Cores. The E元4s are operated as straight pentodes, approximating the condition recommended by Philips (Class A/B, 3k5 anode-anode load), which brings out the character of the E元4 superbly. Coupling between the two stages incorporates both LF and HF compensation networks to ensure a clean, crisp transient response at both ends of the audio spectrum.īoth the 6AU are valves that we have many years of experience with, and, importantly, plenty of NOS stock, so servicing is not going to become an issue. It's a common topology in valve amplifiers as it's elegant, works well electrically and sounds excellent if implemented properly. THE AUDIO NOTE COBRA is a simple and straightforward design, using a triode connected 6AU6 as the input valve, and a 5670 double triode as cathode-coupled phase splitter. And it is in this Lithuanian company that the reviewed COBRA amplifier is manufactured. It manufactures various devices in the OEM system for many well-known audio brands, and since 2004, so for a very long time, it has been producing many of Audio Note components, including all CD players and transports, the entire Zero series, as well as power supplies for TT1 / TT2 / TT3 turntables. Its owner is Tadas Motiejunas, who has been a distributor of Audio Note products in the Baltic countries since 1998. The latter, called Serva Se, is a particularly interesting case. To maintain the latter, some time ago Qvortrup decided to establish cooperation with two factories outside the UK - in Austria, and in Lithuania. One thing has not changed - these devices have been and still are expensive or very expensive.Īudio Note UK, on the other hand, offers a wider range of devices, both in terms of their type and price. With time, also a turntable and loudspeakers were included in its offer, but it seems that these were only temporal and not a permanent changes. The Kondo, on the other hand, remained faithful to the original ideas of Hiroyasu Kondo, i.e.
⌋ĮTER QVOETRUP’S INVOLVEMENT IN THE BRAND resulted in the introduction to the Audio Note UK’s lineup of devices of his idea, such as: turntables, CD players, digital-to-analog converters and loudspeakers. A year later, the British branch was taken over by PETER QVORTUP, which over time also took over the rights to the AUDIO NOTE UK brand and turned from a distributor into a manufacturer.
In 1997, the company split into two parts, Kondo Labs, focused on the Asian market, and Audio Note UK, responsible for Europe and the rest of the world. The first products hit the world markets in 1989. ⌈ AUDIO NOTE is a company founded in 1976 (company site says October 1979) in Japan by HIROYASU KONDO.
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