Why is the sound created by the wisdom of the British so intelligent and noble? The beautiful sound and the vividness of the gorgeous colors draw you in ecstasy. The majestic sound is reminiscent of the roar of a lion with a large lung capacity, and is very impressive. It is cleverly designed so that you can enjoy it without having to turn up the volume too loud. Although it is a coaxial horn type, it does not give the impression of a horn speaker. The amount of energy in the mid-high range is large, and the horn does not get too loud. There is no "horn smell" that is so-called.It never produces a harsh sound, and you can enjoy listening to music for a long time without getting tired of listening. On the other hand, the high resolution, crisp sound, and good transients clearly give the horn-type superiority in terms of the accuracy of the keystrokes of the large keyboard instrument, the piano, and the reproduction of percussion instruments. The sound of string instruments also has almost no dark, astringent, or tarnished tone, as was once said. It has changed from the expression that emphasized macroscopic shadows rather than detailed depiction of details, which enveloped the whole with a unique atmosphere like the old TANNOY, and instead tries to get closer to the inner world of music through detailed depiction of microscopic textures. I am deeply impressed by the enormous accumulation of know-how cultivated in product development by TANNOY, which has a history and tradition of 100 years since its founding, and it can be said that the highest level of perfection has been reached through successive generations. It has a British-style sober and heavy sound, but compared to the old generation model, which had a sleepy sound, the urethane edge has been changed to a hard edge, and the low range has been tightened and the volume has decreased, but the sound has evolved to a high resolution.In short, it is a very wonderful speaker with extremely high musicality.This model is a floor-standing coaxial 2-way speaker Turnerry/GR equipped with an alnico magnet "ALCOMAX-III" that emits three times the magnetic energy of conventional alnico. It is a limited edition model of 150 sets worldwide.The cabinet is made of American walnut veneer and solid wood, and is hand-finished with oil, giving it a high texture and a beautiful finish like antique furniture.Originally founded in the UK, TANNOY moved its company and factory to Scotland over its long history, and then to Poland, but is now back to its factory near Glasgow, Scotland.The design department is located in Manchester, England. The product lineup includes the PRESTIGE series of furniture-style home speakers, and many other casual products for consumer use. On the other hand, the company also has a full lineup of monitor speakers for recording studios and broadcasting stations, and products for clubs, and the main business is mainly for commercial use for facilities. TANNOY is very popular, and has been popular for many years in Japan, Taiwan, Canada, etc., but the experienced, long-time supporters almost all want furniture-style TANNOY like the PRESTIGE series. I was amazed at the beauty of the actual product and the high level of satisfaction I get from owning it, and I am very satisfied with my purchase.GR (Gold Reference) means "the highest peak of sound".Compared to JBL and ALTEC, high volume playback is a bit difficult, and the high frequencies start to break down and sound distorted, but it's not a speaker that you'd listen to at high volumes that would hurt your ears.The latest TANNOY sound is meticulously crafted.It respects tradition while evolving to match modern music sources, and is meticulously crafted.The direction of steering has been carefully considered repeatedly, and it is so ideal that it is impossible to imagine anything better.So there is nothing to complain about.It is better than the old product.I would like to add that the evolution from the previous generation product is quite remarkable.The best amplifier to combine with it is still a vacuum tube, but it is also widely known that it goes well with Accuphase, Luxman, Esoteric Class A power amplifiers and McIntosh amplifiers, and you can feel the benefits of solid state with a dynamic power and clarity of contours, a deep sound image, and a highly realistic sound.The speaker cables are QED SIGNATURE REVELATION or Van den Hul, which is used for internal wiring, and seems to be copper wire KIMBER 4TC was a good match for the warm sound. QED's top-of-the-line model is too peculiar in terms of tone, so many people will not like it. TANNOY's 10-inch is not lacking in comparison with the 15-inch rather, it is easy to handle and even preferable.It is a speaker that makes a traditional box sound, and does not require a specific amplifier.It sounds good enough with a beam tube PP amplifier, it is a type that actively makes use of the box resonance, but it is essential to wear spikes or feet to suppress low-frequency rumble and booming. In addition, there is a big difference in deep bass compared to 15-inch speakers. If I had to choose one speaker in comparison with ALTEC speakers, I would choose ALTEC. However, the TANNOY GR series has an advantage in that it can play many genres of music without being too picky about the program source. TANNOY is calm and sophisticated. It has excellent detail and a fine and rich taste. ALTEC is bright and shining, and the sound flies through. It is also much better than TANNOY in terms of the impression of music and the fascination of sound at first listen, but it has a sleepy sound, soft focus, and blur. The depiction is rough and picky about the source. In comparison, ALTEC is too service-oriented, overdone, and overly made up, but I still love ALTEC. Comparison of the coaxial unit of the TANNOY Gold Reference series ALCOMAX-Ⅲ (left) and ferrite magnet (right). In terms of mastering it, the most important thing is the audio board at your feet. There are four silver stainless steel studs at the base of the speaker, so it can be used without spikes or feet. I installed a Norwegian-made soundcare SuperSpike SS8 on a Turnberry/GR LE. The SS8 with a screw diameter of 8mm is suitable.This product is 5.5cm long, and the screw part is 2cm, increasing the overall height of the speaker by 3.5cm. The spike + receiver are enclosed and integrated in a hard, heavy, and massive ABS resin housing, a groundbreaking product that has been on the market for quite some time. The new generation TANNOY speakers also have an earth terminal, but whether it is effective in improving the S/N ratio depends greatly on the customer's environment. Normally, it is not necessary because the amplifier is grounded by the 3P power plug of the power cable, but it may be effective depending on the room environment. The earth connection is connected to the amplifier's earth terminal. The TANNOY Turnberry/GR LE saran net has poor sound permeability, so it is usually removed before use.Older models required a key to attach and remove it, but losing the key was a problem.Nowadays, you can remove the net by holding the knob at the bottom, pushing it upwards and then pulling it towards you. Listening system: TANNOY Turnberry/GR LE audio research SP-8mk2 REV.7 D-70mk1
試聴用スピーカー ALTEC MILESTONE 604 プリアンプ Audio Research SP-8mk2 REV.7
DAC S.M.S.L D-400EX
chief engineer audio research Richard Larson
リッチ・ラーセン氏は1979年から2004年に退職するまで
ARCに勤務していました。創業者のビル・ジョンソンと協力し、
リッチのエンジニアリングの専門知識はビルの初期設計を
具体化するのに役立ち、エンジニアリング・アシスタントの
ウォード・フィービガーと共に設計を生産まで導きました。
リッチは、SP10、SP11、D250、Classic 60、
第一世代と第二世代のReference Seriesアンプとプリアンプなど、
多くのクラシックなARC製品の開発において極めて重要な役割を果たしました。
ラーセン氏の専門はトランス設計で、電源トランスと出力トランスの
専門家でした。これによりaudio researchは、
高出力真空管アンプ設計の最先端を押し広げることができたのです。
これにより数々の受賞歴のある製品群を開発することができました。
リッチは引退後も長年にわたり、現在のARCエンジニアリングチームが
疑問点や新設計の支援を必要とする際に、常に対応していました。
リッチの計り知れない影響力は今もなお感じられます。亡くなるまで、
audio research Reference 320Mモノブロックアンプの
出力トランスのコンサルタントを務めていました。リッチと知り合い、
共に仕事をすることは喜びでした。彼は常に礼儀正しく、思いやりがあり、
決して怒らない、まさに完璧な紳士でした。( audio research )
Audio Research D-70 Vacuum Tube Power Amplifier United States 1983 JP￥1,050,000
It has a sound field space overflowing with transparency, as well as the ability to describe exquisite touch,
The sound has a resolute expression, high speed and sharpness,
The stability and stability of the sound are also exceptionally good.
The sound is hot and passionate, as if blood is about to spurt out at any moment,
The ARC sound is like riding on a cloud, with the hot, passionate sound of blood spurting out at any moment skillfully blended and superimposed with a luminous, religious solemnity.
The ARC sound gives you the feeling of being on a cloud.
The music itself is conveyed in a truly accurate manner.
The music's realism and reality are extraordinary,
Many people will immediately notice that it is on a completely different level to other companies.
The D-70 combines the incomparably beautiful sweet tones of a tube amp with the
The D-70 has the incomparably beautiful sweet sound of a tube amp, with the extraordinary driving power of a solid state amp,
The D-70 is a hard-edged amp that produces a very well-formed, crisp sound without the slightest ambiguity.
A hard-edged amp that produces a very well-formed, crisp sound without the slightest ambiguity. The reduction in noise makes it easier to get thorns in the sound.
The temperature sensation is also a little lower than that of classic tube amplifiers, but the sound is still very good,
However, this is a wonderful amplifier that lets you enjoy the beautiful, heavenly mid and high frequencies.
Sarah Brightman's voice is mesmerising, with a nobility and beauty like an angel's chirp,
The dynamic sound of the fundamental and the warm and sensual tones are
The dynamic fundamental dynamic sound and the warm and sensual tone are truly unique. The output stage configuration is the same as the D-79C,
The output stage configuration is the same as the D-79C, with a push-pull 6550 and the same 6550 screen regulator.
The same 6550 is also used for the screen regulator. Audio Research's patented
Cross-coupling is taken a step further and the DC balance is automatically tracked to prevent drift and
automatically tracking to avoid distortion.
The semi-conductor support circuitry ensures that changes in the characteristics of the sphere during use, which is a drawback of conventional tube systems, are completely stabilised.
The power amplifier is completely stabilised by semi-conductor support circuits,
The power supply section is also fully stabilised.The main features of the D-70 are
The output transformer is based on the latest technology.
Extremely wide bandwith and dynamic range,
and high resolution.
Hybrid tube amplifiers are designed to reduce the number of faulty tubes.
This model is the result of the uncompromising pursuit of sound quality.
This model is the one that was pushed forward without any compromise, and uses 13 vacuum tubes.
The full-tube vacuum tube amp has a circuit configuration similar to that of a solid-state amp.
The circuit configuration is like that of an amplifier. For sound,
The company spared no expense in mobilising all kinds of technology for the sake of sound.
A legendary model most strongly supported by American audiophiles.
The legendary model that has become one of the most strongly favoured by American audiophiles.
This is the starting point of Audio Research Corporation's service.
The D-70 is the most popular power amplifier of the 1980s.
William Zane ‘Bill’ Johnson was
founded Audio Research in 1970, and at one time was the founder of
products based on vacuum tubes, which at one time were considered by many to be an obsolete technology.
He developed products based on vacuum tubes, which were at one time considered by many to be an obsolete technology. Guided by a passion for music and quality listening,
Johnson refused to be swayed by the fashions and design trends of the times,
The ARC products are the work of Bill Johnson and his genius engineers and re-creators.
and his one-hand man, the genius engineer Rich Larsen.
The passion, creativity and dedication of Bill Johnson and his brilliant engineer Rich Larsen live on in ARC products.
The ideal world they envisioned is vividly expressed,
in the people and products that ARC continues to live on today,
Bill's legacy is still very much alive today.
The products of their heyday are enduring and timeless,
in that they can last a lifetime,
Audio Research products perfectly reflect this.
Tube stereo power amplifier 60 watts continuous from 20 Hz to 20 kHz at 16 ohms.
(both channels operating) Less than 1% total harmonic distortion (typically less than 0.005% at 1 watt)
15Hz to 30Khz (-3dB points)
The changes from the D-70 to the D-70mk2 are that the four 6DJ8/6922 tubes, which get hot, have been upgraded to the very tough and long-lasting 6FQ7/6CG7. A relay has been installed and a delay circuit has been added so that it takes time for the screen lamp to light up.This reduces the inrush current that puts strain on the vacuum tubes and parts. For example, if you turn on the D-90B with a tube tester attached, you will see that the inrush current is large and the needle swings so much that it exceeds the measurement limit of 100mA, but the inrush current of the D-70 has been significantly reduced. The inrush current of the D-70mk2 has been reduced even further. It is difficult to say how the sound quality has changed, but at least the D-70mk2 does not sound worse. I own both the D-70 and the D-70mk2.
Modern Russian tubes are recommended for the output tubes of the D-70 power amplifier.
As the aging process finishes and the tubes open up, they can be adjusted at a lower 50mA.
The sound is not so different from the D-115mk2. The trick is to match the pre with an ARC SP-8.
The trick is to adjust the volume position well so that it can sound at 13 o'clock.
This will give a very different impression of the playback sound.
Audio Research D-70 power amplifier bias adjustment method
Listening speakers ALTEC MILESTONE 604 Preamplifier Audio Research SP-8mk2 REV.7
How to use the TV-7A/U vacuum tube tester The TV-7 series is a vacuum tube tester for the US military used in the 1950s and 1960s.As it is military equipment, the main parts such as switches are highly durable and parts are standardized. There are TV-7/U, TV-7A/U, TV-7B/U, and TV-7D/U depending on the time of manufacture. The main purpose of the TV-7 series is to easily determine whether a vacuum tube passes or fails, and accurate measurements are not required. Special test data is required to perform the test.The 80-page booklet contains a list of testable vacuum tubes, instructions for each switch and dial position for filament, selector, bias, shunt, range, and press, and numerical values that serve as the criteria for pass/fail judgment.The booklet contains data such as selector positions and rejection values for 300B and 2A3, but does not include KT-88, 6550, 6L6G, etc.For bulbs that are not listed in the booklet, there are websites on the Internet where you can refer to the settings.The procedure is to prepare a 100V → 110V or 100V → 117V step-up transformer to boost the voltage to the TV-7's appropriate operating voltage of about 110 to 115V.After boosting the voltage, insert the Sanwa PM3 tester into the outlet with the dial set to AC/V and obtain the actual value.First, be sure to turn the line adjust dial at the bottom left of the unit all the way to the left before turning on the power switch.Next, to correct the error caused by the difference in values due to the power supply voltage, operate the line adjust dial and press the line adjust button on the right push switch No. 1 to fine-tune the meter to 60 and the center of the LINE SET each time.This is because the voltage of the household power supply fluctuates depending on the time of day.First, set the selector correctly, insert the vacuum tube, turn on the power, for example, press button 3 for the vacuum tube and button 7 for the rectifier tube to read the GM value directly. What the TV-7 looks at is the GM (mutual conductance), which is the parameter of the vacuum tube's amplification.GM is, in simple terms, the degree to which the plate current changes with respect to the change in grid voltage. The higher the GM value, the better the tube, close to a new tube that has never been used. When a vacuum tube is used a little after it is new (NOS), it ages and the GM reaches its maximum value. After that, the more it is used, the lower the GM value becomes, and when it falls below the rejection value, in other words, the minimum level in the TEST DATA book, it is discarded. By recording the values of vintage tubes when they were new, you can tell that the tube has been used quite a lot. The rejection value is a military standard, and is set with a certain amount of leeway, so in reality, even if it falls below the rejection value (discard value), it may still be usable in vacuum tube equipment. It cannot be used in military communication equipment, but can still be used in vacuum tube radios and amplifiers. There are cases where a tube with a high GM will reach the end of its life before a tube with a low GM. In other words, the tester is only a guide, and it can tell you how healthy the tube is, but it cannot tell you the exact lifespan.It only tells you the approximate degree of wear. For power tubes and MT tubes, if the GM value is within ±10%, they will be paired. Strictly speaking, if you use another vacuum tube tester to measure the plate current at two or more settings, and if both match, the pairing selection is complete. If the selector is in the wrong position, it may cause a short circuit and damage the tube or the tester, so if you are clumsy, you should check the selector and booklet multiple times and operate it carefully.In the worst case scenario, you may damage an expensive tube. Also, the test must be done in the shortest time possible. Try to finish it as quickly as possible in an instant. It may cause damage to the tube.It is better not to test newer tubes with high GM values such as 6DJ8 and 12AX7. It is important to match the shunt used when testing the bias and rectifier tubes exactly.If a low perveance tube is tested with a low shunt, i.e., with a low termination resistance, too much current will flow and the filament will be damaged immediately.5U4G is also dangerous.The TV-7 series is equipped with a tool for straightening bent pins that can be used with MT tubes and smaller mini rectifier tubes such as 12X4, so be sure to insert it and straighten the legs of the pins before inserting them into the socket.It is best to buy a calibrated TV-7A/U with a serial number of 1200 or later.The best is the TV-7D/U type.You can find out the approximate values for each brand of vacuum tube by searching for similar tubes in the Hi-Fi Do past product database.Vacuum tubes are TELEFUNKEN, SIEMENS, GE, RCA, SYLVANIA, Mullard, GEC, etc. Tubes from the former Western countries are produced privately, and since there is a competitive principle between companies, they try to produce products of consistent quality with little variation. In other words, tubes from the former Western countries have relatively little variation in performance in the GM value when they are NOS. Tubes manufactured in the former Eastern Bloc countries such as the Soviet Union and Eastern Europe have some variation because they are made by order of the state. The market price for a calibrated TV-7AU at auctions and other private sales is just over 100,000 yen. It is not worth spending more than 150,000 yen on a TV-7.This is because the British-made fully automatic vacuum tube tester Orange Valve Tester MK2 can be purchased new for about 180,000 yen even if you use a safe import agent. Since Kurosawa Musical Instruments is the distributor of Orange products, I hope that they will resume handling them as they did with the previous Orange VT-1000. If you have both the TV-7 series and the SD SOUND TC-2, you can measure the plate current with the TC-2. The TC-2 also has a vacuum tube aging function, which drastically reduces the initial failure rate of vintage tubes, which can be as much as 10-30% depending on the type of tube, and extends the lifespan of the vacuum tube by 50%. Unfortunately, the website is no longer available, so SD SOUND may have gone out of business recently. References: Tube Kingdom, Vol. 114
New York Audio Laboratories NCP-II Vacuum Tube Preamp 1982 USA $2,000
Designed by Harvey Rosenberg of New York Audio Laboratories, who was fascinated by the JULIUS FUTTERMAN OTL amplifier.
Designed with the latest technology of the time under the overall direction of Harvey Rosenberg.
High resolution, low residual noise and crystal clear sound quality.
Focus is sharp and the sound is fine and delicate.
The beauty of the milky, fine-grained, slightly hard sonority at the end of its disappearance lingers in the ear.
Reproduction of fine nuances with a highly detailed touch, like a miniature painting,
The entire bandwidth, from high to low frequencies, is full of energy,
The balance is superb. The rendition is detailed to the smallest detail,
The reproduction of the recording site is also excellent. There is no trace of the roughness characteristic of US amplifiers.
Smooth, fluid and harmonically beautiful, the most
It is considered to be the most hi-fi and modern sounding tube preamplifier made in the USA in 1982.
It does not have a touch of enhanced brushwork like the ARC, and there is no
There is no sense of emphasis. Natural contouring. The background is transparent,
The rich, colourful and lustrous female vocals are bouncy and have a strong centripetal force.
Pianos have brilliance, and the lower attack and pitch differences are
The lower attack and pitch are clearly defined. The difference in these lower registers is significant.
A noteworthy beauty is the pleasing expression of the pianissimo (weak notes).
For example, the counter point has a supple, soft sound.
The NYAL did not, however, have such a sound, and had a decided lack of power.
The NYAL did not, and had sufficient attack and dynamics.
NAYL is not colourless and transparent, but has colour.
It is accompanied by a certain glamour and a sense of production,
It has a kind of flamboyance and a sense of production, and you can expect the ‘good old American sound’ of the 1980s and not be betrayed.
You won't be betrayed. Even if you listen to the music at high volume
You can enjoy listening to music for a long time without getting tired of it.
N.Y.A.L Harvey Rosenberg
Tubes: 6DJ8 x 8, 12AT7 x 1, independent left and right volume.
All tubes were from TELEFUNKEN and Mullard.
Listening equipment ARC D-70 power amplifier ALTEC MILE STONE 604 speakers
