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[技术帖(其他)] 转帖:访问audio consulting:2009年4月

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It's been going on ever since men first began sponsoring the oldest profession in the world. And even spiritual seekers partake. "My master is so patient, he corals a wild yak, feeds it just one grain of sugar, then combs its tail until it gets sweet and completely tame." "That's nothing, man. My master is so strong, he takes your hairy wild beast and blows into its nostrils until the horns uncurl and go straight as arrows."

Audiophiles likewise engage in supremacy tests. Anyone visiting Serge Schmidlin on Lake Geneve who feels strongly about his own status of tweak master shouldn't even bother going until he has completed the following list. Make your own cables. Check. Make your own connector housings. Check. Your own resistors. Capacitors. Battery cells. Tone arm. Turntable. Stepup transformers. Input transformers. Interstage transformers. Output transformers. Passive transformer volume controls. Loudspeakers. Loudspeaker drive units. Tube and transistor amplifiers. Preamplifiers. Knobs. Housings. Stands...


Did I forget anything? Most likely. But the point has been made. In our industry, very few small-timers have demonstrated anywhere near the comprehensive, no make that compulsive penetration of the outer reaches of tweakdom as the man running Audio Consulting out of a townhouse in the vineyard-surrounded Swiss community of Commugny/Coppet.




Born with an inquisitive mind, trained in the sciences as a chemical researcher with a Ph.D., no phenomenon related to audio is too small to attract Schmidlin's attention. Getting off the grid into full battery power starting with the turntable all the way down to the amplifier driving his own speaker has just been the beginning. Thermal effects from a chip warming up which controls the steering of the turntable motor? Check, it gets it own aircon cell itself powered from batteries of course. Freed from the vagaries of AC power gremlins, Serge feels he has opened a virtual pandora's box. If one is serious about performance invariability, in other words sonic excellence that won't drift or fluctuate, everywhere one looks is the enemy. Forget UFOs and alien abductions. This is a self-inflicted paranoia of a very different sort.


Serge Schmidlin and the better half of the 6moons management team

Does that involve changes in air density? You bet. Exposure to EMI and RFI? Yup. We'll now stop the silly "my master is greater than yours" game. It should be obvious that Audio Consulting is serious about the little things. Schmidlin takes the time, effort and money to create unconventional solutions. You may disagree with the specific outcomes but you could not possibly accuse the man of lacking inquisitiveness or nursing a crush for leaving good enough alone.



With the countdown for HighEnd 2009 in München ticking louder as the days go by, Schmidlin was preparing his act with Jean Hiraga (speakers) and Hanss Acoustics (turntables from China). What mad new toy would he introduce to the visiting masses who always seek for the latest and greatest?



How about a CHF 168.000, pure DC tube phono stage with separate battery banks for the anode and heater supplies, dual-differential circuitry and a high-level input for a USB DAC? Check.



This three-tiered device runs an MC step-up transformer custom-wound to a specific cartridge rather than adjust the loading with a resistor across the secondary as usual. From there the signal enters an ECC 88 fully differential 1st gain stage that is interstage transformer coupled to an ECC99 passive RIAA driver and 2nd gain stage. Another IT couples that to the final Western Electric 437A gain and single-ended output stage which feeds a 24-tap output transformer to act as an - um, active transformer volume control.



To not further invite shameless profiteers from cloning Schmidlin circuits and presenting them as their own -- there's one such infamous operator in Switzerland itself -- I wasn't allowed to publish close-ups of the innards. This deliberately blurred shot shall suffice. It does however hint at the eight custom-wound all silver transformers, the massive custom power supply decoupling capacitors for the three stages, the capacitor banks for the tube biasing, the thin copper lining of the Bird's Eye Maple-veneered Spruce chassis with Cocobolo accents and the star grounding between the valves.



Here is the three-tier Mains Independent Phono Stage flanked by a pre-production turntable off its customary stand which otherwise would conceal the various battery supplies.
To arrive at the precise supply voltages required, Schmidlin can't use automotive SLA batteries or equivalents for this device. So he builds banks of 150 Lithium batteries each that occupy the two lower boxes clad in MDF, then lacquered in seven layers. The numerical voltage displays can be turned off of course.



The top Birch enclosure deliberately avoids lacquers and thus, static and goes for hand-rubbed oils. The Cocobolo knobs and stand uprights are hand-polished to such a high degree as appearing satin lacquered even though they eschew any treatment whatsoever. As a trained chemist, Schmidlin is very particular about such matters.



For sonic reasons, avoidance of field effects and more, Schmidlin favors particular woods but in a concession to customer requests, the fronts here are adorned by anodized metal facing as is a small plate dressing up Tube Island.



Wood too are the Arbelos Elektroakustik WoodLenses by Christoph Mijnssen of Rorschacherberg underneath the kit.



Here is the vented Cocobolo top without the four corner mount screws.



The back shows RCA and XLR outputs and ground posts on either side to reach a turntable placed left or right. The cables here are Serge's own, naturally of treated silver encased in cotton and terminated in wood sleeves.

Here's the battery bank for the transistor amplifier driving the Audio Consulting 106dB Rubanoide speakers.



Here are the guts of a MIPA amplifier



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Here is the three-tier Mains Independent Phono Stage flanked by a pre-production turntable off its customary stand which otherwise would conceal the various battery supplies.

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To arrive at the precise supply voltages required, Schmidlin can't use automotive SLA batteries or equivalents for this device. So he builds banks of 150 Lithium batteries each that occupy the two lower boxes clad in MDF, then lacquered in seven layers. The numerical voltage displays can be turned off of course.


The top Birch enclosure deliberately avoids lacquers and thus, static and goes for hand-rubbed oils. The Cocobolo knobs and stand uprights are hand-polished to such a high degree as appearing satin lacquered even though they eschew any treatment whatsoever. As a trained chemist, Schmidlin is very particular about such matters.


For sonic reasons, avoidance of field effects and more, Schmidlin favors particular woods but in a concession to customer requests, the fronts here are adorned by anodized metal facing as is a small plate dressing up Tube Island.


Wood too are the Arbelos Elektroakustik WoodLenses by Christoph Mijnssen of Rorschacherberg underneath the kit.


Here is the vented Cocobolo top without the four corner mount screws.


The back shows RCA and XLR outputs and ground posts on either side to reach a turntable placed left or right. The cables here are Serge's own, naturally of treated silver encased in cotton and terminated in wood sleeves.


Here's the battery bank for the transistor amplifier driving the Audio Consulting 106dB Rubanoide speakers.


Here are the guts of a MIPA amplifier.











單看瑞士環境...已经知道Audio Consulting之設計及声音取向......

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Arm-chair tweaks should by now have sobered up all the way. Still feel condescendingly superior?



These are crossover components for the 100Hz hi-pass of the next-next squared generation of stacked Linaeum drivers.

A close up of the speaker's input transformer



Audio Consulting cabling recalling PHY, Ocellia and NFO.


CHF 123.400 Audio Consulting battery-powered turntable with Audio Consulting arm and Zyx Universe Silver cartridge.



Turntable battery supplies, including one for the aforementioned internal aircon cell controlling the temperature of the motor controller chip.



An SLA battery is sufficient for the base job but the specific voltages for the table proper once again require Serge-style custom DC cells.


This Audio Consulting arm is hand-crafted from ancient swamp wood.



Did you expect normal tone arm wiring? Sorry to disappoint.



Wood, silver and custom transformers for coupling, gain and attenuation, tubes and batteries - those are the core tenets around which revolves Serge Schmidlin's audio religion. Covet not thy neighbor's parts. Roll your own! - [Kawasaki, Let The Good Times Roll, 1st Ninja Edition.]


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Switching speeds is nearly instantaneous on the direct drive turntable. Without any Acrylic or other plastics, this deck creates no static discharges. As a result, playback is completely quiet (except for the occasional pop from groove dirt of course).


A close up of a Schmidlin resistor



A dead-serious battery bank capable of astonishing current delivery.



The Rubanoide project previously covered here now runs a new custom paper for its bending-wave diaphragms to be utterly impervious to moisture in any climate.



Despite high efficiency, driving a Rubanoide is no job for wimpy SETs. The feedback from the ultra-potent magnets dumps all damping burdens squarely on the amp. 300B aficionados may have to reconsider.



Back to the phono stage, the main reason for today's report. The six tubes are biased by batteries (massive capacitor banks without bypass capacitors) and big oil-filled caps handle the high voltage decoupling. Filtering runs Audio Consulting silver resistors and all supply voltages (107V for the anodes, 6.67V for the heaters) are pure DC. Max gain at 1kHz is 78dB and headroom of the circuit exceeds that of conventional phono stages by a factor of 100, i.e. saturation won't occur until the input sees 5-6 volts.



The high-level input of course bypasses the ECC88/99 stages and taps directly into the WE 437A output stage for about 26dB of max gain. Because of the active dual-mono TVC output, no separate preamp is required. A Mains Independent Phono Stage from Audio Consulting couples directly to your main speaker amplifier.



Prospective customers comfortable of playing these league have to commit a 1/3rd down payment and personal delivery and setup by Serge Schmidlin will occur approximately 4 months thereafter. All battery charging is fully automated and despite its tweaked-to-the-hilt nature, this Audio Consulting component should be set 'n' forget.


Because Serge's Rubanoide Subwoofers were awaiting new drive units to be out of commission during our visit, our brief sonic sampling was down by 6dB @ 100Hz. This, as you might imagine, was no proper condition to come to any legitimate
conclusions. But then this wasn't intended as even an informal review. Rather, it is an it's alive introduction to a new audio device that will bow a month from now at Europe's most important annual trade show. As someone who religiously read all of the La Revue du Son and its l'Audiophile precursor articles by Jean Hiraga, it's only fitting that Schmidlin and Hiraga, young and old master, should now openly collaborate in a joint exhibit. My master plays pool after breakfast...




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房间的构造就是一个大号角呀
zxc0622,2006050821222.jpg
2009-5-3 00:58
岁月尘封住不尽的往昔,影像却可为我们打开一扇记忆的天窗

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200年对audio consulting的访问,这些东西现在已经看不到了

[table=67%,#ffffff][tr][td=1,1,198%]Audio Consulting First Visit
Audio Consulting is a small Swiss firm who produces cost no object Hi-End parts and products . Their philosophy is to use only the natural materials and avoid synthetic as much as possible to achieve naturalness in sound.      This is the Starting Point
Two things here;
Power supply of the reference system.
The unit in left is the power supply of the reference amplifier. (This is the equivalent of power supplies in their amplifiers)
Signal is converted to a single 300 VDC bus and forwarded to listening laboratory by pure silver cables. Only this DC voltage enters the listening room where it is converted into various other DC voltages by the means of a custom made Switched mode power supply using silver wire power transformers


    AC Conditioning
Three phase electricity supplies the amplifier. (This is the equivalent of power Audio Consulting AC conditioner and transferred to 220 Volts after the filtering. We will see in detail later on.

First Shock
This crazy looking thing is just an amplifier. No, no, it is not 2 * 1000 watts, it is only 4 * 5 watts.  The Single Ended Triode amplifier uses two pairs of Western Electric 300B output tubes.  Chassis look like wood, yes it is wood but filled in by sand !!. Inside of the cabinet is covered by copper for EMI/RFI shielding.

  This gorgeous looking amplifier does  include a SMPS (Switched mode power supply) and used WE 300B in the output stage (we will see later) .Driver/input stage are WE 437A . The reference amplifier is driven by revolutionary  Silver-Rock passive pre-amplifier.  Sand filling holes are seen at left    Another look of the reference power amp . Output stages are directly coupled to the speakers by the means of Silver Rock SE OPT抯: 2K6 Ohms / 4 Ohms for the bass drivers 2K6 Ohms / 0.1 Ohms for the ribbon tweeters    
Tons of stuff to talk here but the space is limited. This reference system is not built for commercial reasons. This is the laboratory equipment of Audio Consulting to test parts, tweaks, transformers, cables, etc. This system also may be considered as challenge of human being to the limits of today抯 technology and materials.

The loudspeaker cabinets are made of 5 layers of lead and 4 layers of plywood glued together. All other walls are hollow and sand filled.
Each of the cabined is 375 kilogram; 375 kg of one speaker and 1,5 tons for a pair of speakers. Woofers are specially made for A.Consulting by Supravox which consist of pure silver voice coils and electromagnets. Entire box is treated with C37 lack which cost them 2.000

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回复 7# turboguy 的帖子

可以感觉到audio consulting在蜕变。
以前对他们的电源处理非常感兴趣,自己也胡乱搞了一番,当然是不得要领。

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这老外的东西好像都大一号

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金属对声音的干扰不小啊,看来选择木料是不错的,audio consulting甚至BT到连牛的固定都用线来绑!

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