Category: Audio

My story

Those of us audiophiles grown up in the 80ties (last century) may remember: It was the time, were the Stereophile as also the Absolute Sounds magazine were like the bible for us, the time, were Nastasja Kinski showed her amazing curves on the front cover of the French erotic magazine “LUI” and we dreamt about Nastasja and a proper HiFi – system – but could only afford a Sony Walkman to listen to some 80ties stuff like The Cure, Joy Division and Prince or Michael Jackson (I was not a Madonna fan at this time….;-)))

One day my Sony Walkman headphones broke – a catastrophe, but a good occasion to visit one of the high end dealers in our town, instead of pressing my nose against the store window, I had now a proper reason to step into the shop .

So I pulled myself together and entered the shop…..oh my….. Micro Seiki turntables, Fidelity Research FR64S and 66S tonearms, Mark Levinson amps and preamps, a Cello Audio Platte and a Kiseki Purpleheart cartridge, mounted on a SME V tonearm. This little jewel got my attention – a dream, made of brass and a strange purple coloured wood with a tiny needle under its long body – it was so beautiful, that I could not forget about it in all the years followed that day. I promised myself – one day such a Kiseki will be mine – not knowing if it sounds good nor what such a jewel will cost. The following decade was stuffed with Rega decks and tonearms, cheap moving magnet carts, Mission amplifiers and tiny British bookshelf speakers – but deep inside my heart was still a purple shine from that Kiseki cartridge.

As the financial situation once changed and I eventually could afford such a cartridge, the company had disappeared – CD – players were now the holy cow, and Herbert von Karajan claimed – against the sound of the CD a vinyl record seems to be like gas light – how wrong he was!

Ok – no Kiseki for me – sometimes I saw some vintage ones on ebay or other audio selling platforms – Kiseki Agate Ruby, Kiseki Blue Goldspot and Kiseki Lapislazuli – but never was there a Purpleheart on offer.

Here and now

In 2010 I spotted some new old stock Kiseki Blue – and recognized that Kiseki was again back on track – the man behind that brand, Herman van den Dungen, coming from the Netherlands, decided to participate at the upcoming vinyl revival and used old parts from the 80ties to built a brand new Kiseki Blue. Since I was totally aware of that new situation – the complete series of these NOS (New Old Stock) Kiseki Blue were already sold out….

OK, again – no KIseki for me….

Van den Dungen realized that there was a growing market for his Kiseki cartridges and did a very bold step – he recreated the brand, now with new parts, a new design – and he called these cartrdges NS – which stands for new style.

Exploring the miracle

One day I found a little package at my doorstep – and my pulse began to rise. Inside the package I found the traditional round wooden box with the myterious Japanese writing on its top. Van den Dungen created the Purpleheart NS (New Style) in a different way he did with the Blue NS cartridges – the new style Kiseki Purpleheart had its traditional long body and looked like the vintage original which I was fascinated about since the middle of the 80ties. Oh, what a gorgeous looking pice of audio gear it was….nothing of its beauty had vanished in all those years – it was like I had a time machine, and was again in 1984 together with my old Walkman, the LUI magazine with Nasti on its front and all the great audio gear of that time – the only sign which tells me something was different, was the colour of my hair!

The new style Kiseki Purpleheart is a moving coil cartridge with an internal resistance of 42 Ohms, which means, that I could use it with a Denon DL 103 compatible step up transformer. The electrical output is a healthy 0,48mV – so a mach with a 1:10 Step Up transformer will give us clearly more gain, than with the classic DL 103 used with the same step up transformer. The cartridge has at todays standards an unusual long body made of the beautiful purpleheart wood. With some headshells or tonearms there might be a problem with space, as I intendet to use a Frank Schröder Reference tonearm, there was no problem with the size of the cart.

Mounting and adjustment

But there was a serious problem with the weight of that audio jewellery – the cartridge might look big and heavy but it is not – its weight is just 7g – to bring that into some perspective – a Lyra Kleos weights 8.8g and looks much lighter and smaller. There was no chance to get the optimal tracking force of 2.3g for that cart with the standard counterweight of the Schröder Reference – so I had to call Frank, praying, that he was in town and would have time to make me a smaller and lighter counterweight for my Reference arm. To my surprise Frank was at home, and offered me to come over the next day to pick up my lighter counterweight. Thank you Frank!!!!

Adjustment of the cartridge is not an easy task because you cannot see the tip of the stylus without making some Yoga exercise in front of your turntable. At the end I could have used the straight angles from the body, because the stylus of my Purpleheart was mounted with 100% precision – so no correction in geometry nor azimuth was necessary.

To get the most out of this cartridge I would advice you to use 2.3g VTF, which is a tad under the official figure – and a straight VTA, so that the top plane of the cart is parallel to the record surface. You could use a full active phono stage with up to 1 Kohm internal termination, but I think the best sound will be achieved with 400 Ohm. Or you can use  a step up transformer in the range of 1:10 or 1:15 – i opted for the latter – and connected the Purpleheart with the Hashimoto HMX trannies in my Air Tight ATH2A using its high impedance switch. The transformer will give us 23db of gain, and the cartridge “sees” around 210 Ohm.

The sound

The first thing I recognised was the silent ride of that cartridge – you wont get much noise from the grooves, which means, that we have a larger dynamic window for all the small details. The Purpleheart needs less than 20 hours of playing time to come to live – that is something I cannot stress enough – because today some cartridge manufacturers tell us – you need 150 – 300(!!) hours to judge the sound of a moving coil – which is ridiculous. What we can expect after round about 20 hours is a bit more openess in the treble region and a more fluid sound in the midband – but it is not a dramatic change.

Kiseki means miracle – and the name could not be better chosen – because the sound is like a miracle. Out of a very black background we get a fast and articulate sound, with bold colours and a silky smooth top end with an amazing amount of detail and resolution. The bass section is sinewy and reaches into the deepest octave – this bass performance is fast, and has a lot of tone – not that typical one note deep bass with slow action. The stage the Kiseki is able to render has a slight up front gestalt – a singer is not on level with the speaker plane – instead he is placed a good portion in front of the speakers, which gives us a very intimate vocal performance. From the mono center toward the sides, we get a very good rendering of recorded space with a lot of detail and an amazing resolution. The space between the instruments is also very good – not on par with a Lyra Kleos SL – but there is not much missing. The kind of projection is a mixture of pin point accuracy and a sort of wholeness, which makes it very easy to get the whole picture of a recording, while also being able to listen to a large amount of detail.

In comparison with the Lyra Kleos

As the price of the Kiseki here in Germany is around €3000,- it is fair to compare it with one of the best cartridges in this price range, the Lyra Kleos SL. Both perform in a wide margin above its price class, you have to spend nearly €2000,- more to get really something more. And this “something” is not another class or a whole different picture – differences are shown in the amount of resolution and attack pureness, as well as the blackest black in bass of the really big boys. As you spent such a serious amount of money for a moving coil cartridge, it gets difficult to gain more sound quality for the developer of those high end gems. So do not expect a complete different sound quality if you spent €6000,- or more – as I said – you will gain performance in some single aspects of the reproduced sound. A Lyra Etna for example puts a better resolution on the table and has a tighter and deeper bass register with a good more portion of dynamic shades, than a Kleos SL can give us. What I try to explain is – from a certain price range on, you have not a linear function between your investment and a better sound quality. There are some “jumps” in that function between price and sound quality which take place from under €1000 – to the limit of €1000, and there is another bigger gap existent if you double your investment to around €2000,-. After the 2000,- mark it gets much more complicated – so the next little jumb will take place at €4000,- but it is much smaller, than everything till that point.

The Kleos offered in my comparison a better pronounced leading edge. The Kleos has the ability to start and stop immediatly. The speed of this cartridge is astonishing – the Purpleheart in comparison is a little bit slower with not so much accent on the rhythm of the music. The story behind the Kiseki is more about the tone – and in this category it is more beautiful than the Kleos. The latter might be more neutral more transparent, but the Kiseki gives you a more emotional picture of the music. There is a certain emphasis on the lower midband, which renders the body of instruments and vocals with greater impact and a greater sense of authenticity. Both share a nearly equal ability to render recorded space, the Kleos is doing that in a more pin point kind of way, the Purpleheart shows us the soundstage in a broader more bolt style, which makes it sounding a little bit bigger and greater. In the treble area the Kleos is more refined and more open with a greater sense of resolution and detail, the Kiseki is a little bit on the warm side of neutral at this point, which can be an advantage if the engineer or the mastering facility cut the treble slightly too hot, which is often noticeably with the sibilance S or T or SCH. On the other hand the Kiseki is not rolled off – it renders the highest treble with a slight drop of energy – and while doing this, there is a very sophisticated quality at the treble – it sounds wett and three dimensional.

The Kleos is a bit dryer in that area and misses some of the plasticity of the Kiseki. The Midband of the Purpleheart is one of the best I ever heard – it is so colourful and real, with a huge dimension – a dream! The Kleos is fleshed out with an ever so slight cut in the upper midtone spectrum – which gives it the ability to render a very clean and structural sound, even if the record gets more dense and highly dynamic. Both are amazing cartridges – I would vote for the Kleos if you are a kind of listener, who is consuming music in a more intellectual way – the Kiseki touches more the heart and soul of the listener. And the Kleos is more about rhythm, while the Kiseki is more about tone – so both will be a perfect complement to each other.

There is a certain tendency to have more than one tonearm mounted on a record player…..

Relax and enjoy your music

E. Strauss

Introduction

If we think of music reproduction, 90% of the whole information in a piece of music, even more with spoken words, takes place in the audio midband. As we were young dance club visitors the most important thing in sound reproduction was bass – more bass equals better reproduction and greater fun – we had to feel the energy right in our chest. With getting a little bit older, things changed and today I cannot stand 10min of reproduced sound, if something in the midband sounds wrong or coloured.

Where everything began

The best example of the human capability to hear the slightest variations in the midband of the audio spectrum is the voice. If we have our girlfriend on the phone, we can hear in less than 3 seconds in which emotional state she is, and we can also identify a known voice after seconds, even if we haven´t spoken to that person for years . In this example we are using a telephone not a high end audio system – just a simple telephone. The ability to remember the character of different voices we once heard and to recognize even the smallest nuances in them is frightening. If we think about the evolution of us human beings, the ability to listen at such a high level, has something to do with our existence on planet earth, and the sound of our mothers voice was  familiar to us a long time before we were born.

The Goal

Thinking about serious sound reproduction means to deal with the midband. And dealing with the midband is much more complicated than with bass or the treble. Do not misunderstand me – bass and treble are also complex in their own way – but the diversity of the midband, the amazing amount of different shades and the ability to detect them, makes us to real “midband gourmets”. To get more information about the hearing of the human ear, we have to look at the findings of Fletcher-Munson, who manifested in 1933 the famous curves, in which we will see how loudness levels and the ability of our ear to her different frequencies is described. If we take this curves as a fact, we have to get the highest quality in that frequency range in our sound reproduction system we can afford – and – to tell you the truth – it is not cheap nor is it easy to achieve that.

The Midband

One ticket to heaven in the difficult midband area is a very good tube amplification system. That does not imply that transistor technology is not able to reach an outstanding quality in this regard, but to get there via a transistor driven amplifier or preamplifier will be even more expensive than with a tube amplifier.

But a tube amplifier needs tubes – and there the whole story begins to turn. Today we face a growing number of tube suppliers mostly located in russia and china, which give us the most common types of our so urgently needed glass – but how good is the sound of these brad new constructions? If I put brad new JJ or Electro Harmonix tubes in all 12AX7 positions in my preamplifier, the sound  gets more of that specific colour I will find in a cheap transistor preamplifier – sometimes even worse that that. Gone is the complexity of the midband, gone is its smoothness and the grain free gestalt, what I get is a sparkling treble and a nice sounding full bodied bass, but the midband is flat and lifeless, with a clear cut in that frequency range. In other words, if someone will steal all the great old tubes from my stach – I would by tomorrow a very nice and expensive transistor preamplifier – and get rid of all the tube procurement, all the tube rolling, the fine matching to the amplifier – and at the end I would probably save some money too. I cannot tell you, why it is not possible in 2018 with all the computer technology, the materials we have today and the indsutrial possibilities to make tubes with the same sound quality it was the standard in the 30ties, 40ties, 50ties and 60ties of the last century. Maybe computers and all the modern technology we have today are able to create the newest I phone – but are useless to built a tube like the Telefunken ECC83 – who knows.

Meeting a Legend

The Telefunken ECC83 is one of the most important tubes in its class – maybe the most important one. It was made in the Telefunken plant in Berlin – and has some distinctive marks which we have to talk about later. The Telefunken ECC83 is maybe the one and only tube in the ECC83/12AX7 range, which behaves is such a neutral way with its sound characteristic, that we are able to hear the quality of a given circuit. That makes this tube for some of us boring – you plug a Telefunken ECC83 into a line stage and the big miracle you will have with a Mullard, Amperex, or RCA Black Plates is seemingly missing. But that is just half of the whole story. A Telefunken ECC83 smooth plates has not the typical shining light to any frequency range or a special dynamic behaviour in the spectrum – nor has it any obvious coloration, but it has one of the most complex midband abilities of all ECC83/12AX7 tubes. You will get a highly neutral ultra complex tube sound, a sound, which needs your attention – it is not a sound were you can read a book, while listening to some music. A Telefunken ECC83 sucks you into the music – and it challanges you.

Together with its neutral full range sound, you will also get an outstanding quality in reproducing recorded space – the smooth Plates Telefunken will render the slightest amount of reflections once captured by the microphones. If you put the RCA Living Stereo with Haifetz´s Interpretation of Sibelius Violin Concerto D minor Op.47 on the platter of your turntable, than you will recoginze after the first movement – it´s all about tone. Hot and cold shivers coming over you while listening to this violin tone – reproduced with a Telefunken ECC83 smooth plates it is so frightening real, that you nearly can touch the instrument. The ability to show the whole spectrum nearly uncoloured and especially the complex midband, makes this concert a very intense experience! The smooth plates Telefunken ECC83 is one of the biggest legends in the ECC83 class of tubes and it´s status there is completely justified!

A trip to the past

The Telefunken ECC83 was used in countless legendary amplifiers of the audio or recording industry, it helped a lot of companies to gain their specific sound, which we adore even today. To name just a view….what happens, if you throw out all 6 Telefunken ECC83 of a Marantz 7C preamplifier – what if you do that with a Mcintosh C22 or with a Telefunken V72 microphone preamp??? Marantz and Mcintosh are more or less the inventors of what we call today High End – and both companies used wherever it made sense at their 12AX7 positions Telefunken ECC83 tubes. The whole US hifi scene in those years used them, Fisher, Scott, Harman Kardon and so on….sometimes they got from Telefunken tubes with their brandname printed on the glass – so it might be possible, that you have seen Telefunken tubes with Fisher and Rogers as also Mcintosh logos on their glass. As Germany was forbidden directly after the second world war to build any arms, the recovered German tube industry concentrated on civil usage of vacuum tubes and one of those fields was the reproduction of sound. Maybe that´s the miracles behind the sound of a Telefunken ECC83. Telefunken had not to deal with constructive details imperative,  if their tubes were used in supersonic jet fighters or bombers which can fly at the border of the stratosphere. Strangely enough, the Telefunken is inspite of their civil purpose, a very rugged construction.

What about noise?

The smooth Plates are one of the very rare tubes which have nearly no problems with noise, nor have tey any tendency to get microphonic. Both attributes make them predestined for the use in very sensitive applications, as we will find them in phono and pre amplification stages of our sound reproduction systems. Imagine a phono stage constructed with two gain stages which will amplify the signal up to 40db – every bit of microphonic behaviour of a tube will cause an earthshaking noise coming out of your speakers. Once you reached a certain quality level of vinyl reproduction – it is the signal to noise ratio, which divides the boys from the man. As blacker the background will be, as much details and recorded space you will get – any tube hiss will weaken the ability to show the dimension in space of the recording. In a phono stage a tube can´t be quiet enough – and with the Telefunken ECC83 smooth Plates we can achieve a level of quietness no one would think is possible using a vacuum tube.

How to spot the original

There are 5 different versions of the Telefunken ECC83 in existence – the oldest ones are called ribbed plates. The anode plates of this tubes have on their flat sides a certain pattern, which could be described as a ladder – or ribs – which gave them their name.

The smooth plates share 4 different variations – all of them differ in the numbers and positions of the holes at the side of the plates – and of course the smooth plates misses the ladder structure on their anode plates – which made them – the smooth plates!

Type 1 of the smooth plates have two rectangular holes symmetrical arranged on top and bottom auf their plates structure.

Type 2 has 4 rectangular holes at the side of their plate structure.

Type 3 has 3 rectangular holes on the side of the plate structure.

Type 4 has again 2 rectangular holes in the plate structure – but this time the holes are more centered – not as far away from each other as it is the case with type 1.

All original Telefunken small signal tubes have the diamond logo at the  bottom of the glass  between the contact pins – that is more important as we might think – because at the end of the tube era Telefunken stopped making their own tubes and sold re labeled tubes from the east german supplier RFT. Those RFT – “Telefunken” banded Tubes do not have the diamond logo between their pis. The great thing is – no one can fake this sign in the bottom of the tube – because it is a structure casted in the glass.

All Telefunken ECC83 have a code on the opposite side of their logo, which begins always with a capital B – which stands for the plant in Berlin/Germany. Telefunken had also a plant in Ulm/Germany, were they made all the power tubes and their special high grade signal tubes(Telefunken “S class”) – in such a case there will be a capital U at the beginning of the code.

The Logo itself changed over the years – very old ribbed plates Telefunken had a small diamond shaped Telefunken logo printed on the glass – later dated smooth plates have the more common large and thinner printed logo.

On the left and right side at the bottom of the logo you will find the writing “Made In”…………”Germany”. At the bottom of the tube you will find the type – in this case ECC83. If the tube was made for export purposes, there will be both type names – the international /US type 12AX7 and the European type name ECC83  separated through a slash.

Some Telefunken ECC83 have numbers, normally three digits, on their getter mirror on top of the tube – this was a special numbering of internal batch matching processes.

If the customer needed special selected tubes, as we will find them in medical or industrial applications, there might be a coloured tip – mostly in red or blue on top of the tube.

Some special grade Telefunken ECC83 have a bank wrapper around their glass with selection informations and names of the company for which they were made – like Tectronics for example.

And there were also Telefunken ECC83 tubes, which were made for the German Post and telegraphic applications – those have in addition to their normal logo a coloured code around the glas. I have such a pair with a red code index for telegraphic applications – but there might be also yellow codes or other coloured codes as well.

All Telefunken ECC83 are long plate types – Telefunken never changed that construction detail, as most of the other tube suppliers did at the beginning of 1960. They all have a round getter ring fixed with one getter support rod, and they should have, if they are in good shape, a shiny silver coloured getter flash. The glass on the getter dome changed over the years – the oldest smooth plates and ribbed plates have 4 segments on their dome – newer examples have a smooth glass dome.

In comparison

A lot of electro technical engineers deny that there will be a sound variation between different tube brands sharing the same category like in our case the ECC83 family. They claim,  that if two tubes share the same measurable data determined with a tube tester, and have the same internal resistance, than both tubes should sound equal.

As I am an audio engineer myself – I am far away from believing in Voodoo, but I must say that the sound differences between different tube brands in one given class are dramatic. A Mullard ECC83 long plates, square getter, wrinkeled glass (MC1) sounds completely different, than a Telefunken ECC83 smooth plates – soon we will discuss that more in depth.

In this case I wanted to know how a modern tube would perform in terms of sound quality against an old Telefunken ECC83. So I did some investigation at the internet to inform myself of the possibly best modern 12AX7 and got as many nominees as there are tubes on the market – but one specific tube stood out of the mass – that was the New Sensor made 12AX7 Gold Lion.

I bought a triplet of those, perfectly matched from a well known tube supplier in Germany and wanted to compare them with a equally good matched triplet of the legendary Telefunken ECC83 smooth plates type 1 with equal production codes.

As we all know, tube rolling is not a game were we can directly compare the sound of two different tubes – because we have to switch the amp of, we have to wait till the tubes cool down before we can pull them out and plug in a new set.

In the professional sound engineering  world, we claim, that our memory dealing with sound will be fooled after 30 seconds – so I decided such a comparison has to be done in a better way. I decided to record the music rendered by the two different tube settings, using a professional 24bit, 192Khz digital hard disc recording system.

After I finished recording of 4 different types of music using the exactly same records, the same cartridge, same turntable, same cabling – everything being as equal as possible, I used a normalize algorhythm  to bring both files at the exact same gain level to get rid of eventually existent gain differences – and listened for a couple of days to the recorded files via headphones and via my Quad ESL 57 and a pair of vintage Chartwell 1 LS3/5a. Later in the test procedere I made blind tests with both tube settings.

And what was the outcome???

In comparison to the Telefunken the most obvious impression you will get with the Gold Lion 12AX7 is a more pronounced bass – it seems to gs a little bit deeper and had a greater sense of dynamic, which gave the bass range a greater impact.

On the other side of the audio band you get the impression the Gold Lion has more sparkling treble with a pronounced roll off in the highest range of the frequencies. This character of the Gold Lion 12AX7 has its origin in a compressed midband – which makes the bass frequencies stand out – as also the treble spectrum. It is the typical – “hello – I am a great HiFi sound” tube character, which so many people fall for it.

With the treble character it is not so easy to describe the difference. An old audio engineer rule says, high frequencies mask lower frequencies – if you cut of the highest spectrum, you get a more pronounced presence in your sound. And that was exactly the case with the Gold Lion 12AX7 – the frequency range was comparable to some MP3 files, were you will not find much signal anymore above 15Khz  – but in spite of sounding dark – you will get the impression of more presence. The Telefunken had the complete spectrum – and this is the reason why a vocal does not jump on you – it is placed were it belongs. The Gold Lion made the presence of the treble more pronounced more sexy but it lacks a lot at the absolute top end of the audio spectrum. If you listen to a singer songwriter track it might be nice, but if your next music sample is some Jazz with pronounced cymbal work, you will recognize that something is missing. Also the compressed midband and the pronounced presenc could make the Gold Lion sounding harsh – because all the smoothness of a balanced tone is gone – what is left is an unbalanced sound which should impress you in the first instance. In the area of rendering recorded space the Telefunken could jump over the Gold Lion – it was no comparison – the New Sensor construction sounded flat and two dimensional. The Gold Lion was simpler – more easy to listen to, it draws less attention to the details, less space, less midband accuracy and a kind of loudness curve was detected. The dynamic abilities of both tubes were more than obvious – the Gold lion compressed the midband from 350hz – 1,5khz while the Telefunken sounded completely open in this range.You will get with a recorded violin the whole gestalt of the instrument – every nuance of it was there with the Telefunken ECC83 while the Gold Lion made it more simple, more easy listening.

Prices and supply

A Gold Lion 12AX7 costs us with a good matching process around 50,-, the Telefunken ECC83 will set you back around 80 – 100,- – so it is much more expensive. But – you payed a lot more money for your phono stage, your cartridge and your tonearm, as also the turntable itself – if you want to keep the signal chain as neutral and as open for what you feed in it, than there is no other way as to bite the bullet and get some good quality NOS tubes!

And do it now – because every year the things get more and more expensive – we are probably the last generation, who will be able to consume the fruits of a technology obviously forgotten in our modern times. We face much larger demand of NOS tubes than the market can deliver – a proved sign are raising prices. The same Telefunken ECC83 costs 8 years ago 50,- exactly what you have to pay today for a Gold Lion 12AX7 – and I thought that was really expensive in those years.

If you spent such an amount of money for a single tube, you should be certain to get good quality – so I am not a big fan of countless ebay auctions with no tube tester is involved or tube testing equipment is used, were you can not work with the data published at the auction.

Buy from trusted sources – pay a little bit more and forget the story of the dead grandfather with a stach full of brad new Telefunken without any sign of a label on the glass or dark getter mirrors. At the end such an expensive Telefunken ECC83 could be also the better decision in the long term, because such tubes will be durable around 10 000 hours – during that period of time it might be, that your third generation of Gold Lion tubes will be necessary.

 

Great listening

E. Strauss