Wunder Audio CM7S Tube Microphone  From Wunder

The upgraded CM7 Tube mic in this fantastic Suprema version features optimized passive electronics and a dynamic response across the spectrum.  

Wunder Audio

$6,650.00

Retail:  $7,395.00

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Manufacturer's Description from Wunder

The new Wunder Audio CM7 Suprema microphone is one step above the already legendary CM7 model. The standout qualities of the new CM7 Suprema passive electronics are their extraordinarily direct low-end responsiveness and wide high-end plateau. Combine this with an audiophile PSU and you'll hear both the best qualities of a modern microphone and the legendary sound of a vintage microphone. The CM7 S is exceptional as a vocal mic as well a it being an excellent choice for drums, acoustic guitars and piano. The CM7 S is a serious pro-studio workhorse because it has a very nice top and bottom, and brings out a natural sound from any source.
 
GRILLE
 
The Wunder Audio CM7 S Grille is true to vintage with three gauges of grill mesh at the head grille: an outer large mesh, an inner medium mesh, and a fine mesh that is sandwiched in between.
 
The Wunder Audio Suprema Grille has acoustic interplay with the capsule, having the electronic properties of a faraday cage. This proper vintage mesh gauge is not the readily available metric gauge and is vastly important for the legendary sound of a U47.
 
M7 CAPSULE
 
The diaphragm in the M7 capsule is stretched and glued to the rim, akin to how a snare drum head is stretched over a rim, and never screwed to the backplate. The backplate is brass and precision milled by hand in Switzerland to the original rim height 15/10000th inch specification within one-micron tolerance. (1 Micron = 0.0000393701 inch). Many other modern capsules are CNC milled and cannot meet these tight specifications. The original M7’s had up to .0002” tolerance, this modern upgrade explains why some brand new U47’s back in the 1950’s sounded better than others.
 
The CM7 S has three mounting isolation rims, true to the vintage Berlin M7 and superior to the Gefell M7 which has only two; having three rims provides an improved isolation of the ground.the capsules are then sent to Germany, where they have perfected the craft of skinning them in gold.
 
TUBE
 
Wunder has put a modern upgrade to the original vintage NOS Telefunken EF14 tube to achieve the same specs as the VF14. The NOS tubes were made in Berlin or Ulm Germany during the same production run as the original VF14’s. The original U47 had a VF14 metal tube that was made in Germany in the 1950’s by the original Telefunken GmbH company, which no longer exists. NOS VF14 tubes in a sealed box are now totally extinct.
 
Wunder Audio only selects tubes from the best production years, the year and the location of where the tubes were made can be identified by the date code on the tube. The VF14 and these select EF14 used all the same tooling for the internal and external components. The only difference in these EF14’s from the VF14 is where the filament wire was attached. The VF14 that was used in the Neumann U47 microphone was under heated, and so if you use an EF14 and run a separate filament at 5.0 V, the EF14 will be sonically indistinguishable to the VF14. With passive electronics, the filament has a slightly modified load to achieve this resulting in identical results to the VF14.
 
CAPACITOR
 
Wunder has optimized the passive components to achieve a true audiophile performance. While audiophile equipment is usually referred to at the end of the chain in recording, it is most important that the first link in the recording chain, the microphone, be the best attainable. To be able to listen to the best possible recording, you must be able to record the source with minimal amounts of noise and distortion and be able to accurately capture every nuance of the sound. Wonder has enhanced the true to vintage microphones by utilizing the Suprema Silver Gold Oil capacitor which is the highest quality capacitor available today. More importantly, sonically the CM7 S capacitor stands out due to its wonderful natural singing and exceptional micro dynamic. Capacitance: 1uF; Dielectric: Polypropylene Metallization 99.99% silver, 1% gold; Purity of silver: min. 99.97% typ. 99.99%; Purity of gold: min. 99.97% typ. 99.99%".
 
TRANSFORMER
 
The transformer inside the CM7 Suprema is a historic recreation of the early transformers used in the exceedingly rare early “Large Badge” U47s. It contains the exact vintage Mu-Metal as these early Berlin U47 transformers and are wound to the original Braunbuch specifications using NOS (new old stock) laminations. The most important difference in the first several hundred “Large Badge” U47’s was that the transformer bobbin was a full 1/8” larger than the later version of the U47 transformer. The CM7 Suprema transformer incorporates these highly desired larger bobbin specs.
 
The CM7 S replaces the problematic PVC wire insulation, upgrading it to Teflon to ensure 100% reliability. Over the decades, the original U47 transformers will begin to decay. The clear PVC coating that was used as an insulation between the layers of the Mu-Metal laminations rubs off by the transformer mounting screws and fuses the lamination layers together causing changes in the lows and high frequencies. Additionally PVC was used as insulation on the hookup wire emanating from the bobbin and this PVC eventually flakes off the wire causing irrevocable damage to the bobbin windings.
 
Aging and decay of the transformer and 30 other components in a 66-year-old vintage U47 microphone is the reason for the undesirable sound in many of the older mics.
 
POWER SUPPLY
 
The new generation tube Microphone PSU is proprietary to Wunder Audio and is an upgrade from the vintage tube mic PSU’s used for the 1960's era Neumann design.the upgrade gets a clean and stable DC voltage to the mic and shields the influx of Wi-Fi and RF interference with 100 percent reliability. Wonder has engineered the PSU to the equivalent of the technology incorporated in top tier audiophile systems, using a duel-pole neutral-fusing design. The PSU can be plugged into any voltage in the world without having to jumper a voltage setting switch.
 
Inside, they've incorporated extremely accurate 30 turn trim pots so voltages can be fine-tuned. Most other power supply designs either do not have a voltage trim or use a single turn pot, which is susceptible to drifting.
 
BOX AND CARRYING CASE
 
Your Wunder Audio CM7 S is nestled in velvet and softly secured in place in a foam-lined quarter sawn oak box that is clasped and hinged. This box then is safely incased in a precision velvet-lined thick foam tweed case that also holds your PSU, your shock mount, and your cables. The tweed carrying case is a work of art in itself; it uses the same Fender tweed found in a vintage fender guitar case which amplifies the vintage period of the vintage-style CM7 S microphone, and it is trimmed with top grain leather and fine stitching. The CM7 S case has a strong leather handle and combination lock to keep your mic secure. This case can be sold separately.
 
UPGRADE YOUR MIC
 
All previous versions of the Wunder Audio microphones can be upgraded to the Surprema.
Wunder Audio

About Manufacturer

We Live, sleep, dream and breath audio and the engineering that refines detail to an obsessive edge. The PEQ1 series was born when we began to ask, "If price and market were no object, what is the absolute best mic-pre/equalizer we're capable of producing?" What we came up with is probable overkill for 98 percent of the engineers in the world, but if you are part of the small demanding group of people that are as passionate and curious about pursuing the ridiculous best as we are, have we got the gear for you. The Wunder Audio PEQ1 and it's History "From the very beginning we looked at the transformers. All of our transformers are still hand made and wound one at a time. We realized that "off the shelf" transformers will never do." The project started when we were joining together and refurbishing two Neve 80 Series consoles. In 1999 we aquired 24 modules that were custom made for a console for John Paul Jones of Led Zeppelin. This was a one-of-a-kind console, and these modules were only ever made for this one desk. We noticed the Zeppelin modules sounded far better than anything we have ever heard. The amplifier circuits were very similar to the 1073s, so the sound had to be attributed to the transformers. We had the idea of making new modules that fit into our 80 Series frame based on those very same transformers. The key to the incredible sound of the PEQ1 are the huge Mu-Metal transformers. They are the exact ones that the old Zeppelin desk had used and are 80% nickel! We did a little detective work and contacted the maker of the original transformers who still had the old plans available and the original winding machine. They did have to re-tool to make the pressed metal transformer can used in the original module. These transformers are physically larger than the ones in a 1073 and just fit in the PEQ1 module housing with .5mm clearance! "The Incredible Sound" The PEQ1 is only similar to a 1073 in that it is a Class A discrete fully transformer floating circuit with an inductor based "British style" equalizer. Compared to a 1073, the PEQ1 has more equalizing power with better lows and more presence in the mids and highs for a sound that lifts the veil off your input signal. The reason for this is simple: the PEQ1 has eight Class-A gain stages where the 1073 has four. The extra gain yields more Class-A headroom resulting in a wider pure path audio. The PEQ1, however, is NOT a 1073 close. It has its own unique circuit, and over the last four years we have made about 20 modifications in the prototype. The only way to explain the sound is that is it like a 1073 with a deeper low end "that goes all the way to China" and more depth overall in the mids and highs without that phasey boxy sound. The 3db roll-off points are 8.7Hz on the low and 118KHz on the top end. The EQ is the best we have ever heard, reminiscent of a powerful Pultec, but with more frequencies. The drum sounds you can dial up are invincible, and nothing can make the vocals stand out in a mix like the PEQ1. There are twice as many amplifier stages in the PEQ1, which provides 60db line in gain compared with the 1073s 30db! This gives you more sonic headroom. The 60db of line in gain also allows for a wide range of instrument/line levels. You can plug a bass guitar, guitar or keyboards directly into the Line Input for a huge, better than any direct box sound. One can also use the Line input as a totally separate microphone input utilizing the large Line transformer. With 42 dB of gain, the Line input stage works great as a 2nd Mic Pre! "Solid in Solid out" All the Gain and EQ switches used on the PEQ1 series are custom made by Elma, which were designed for us at their factory in Switzerland. The custom made (long shaft) potentiometers are Vishay audio-grade, made with conductive plastic for a long life (one million cycles). You can't beat this switch/pot combination. The EQ and Phase switches for the PEQ1 are by Isostat, giving a vintage touch. The PEQ1R uses C&K toggle switches. We have been using huge Sprague "Orange Drop" capacitors for years and seems the obvious choice for the equalizer circuit. We have recapped so many consoles and tape machines in the past and found the Panasonic FC 105?C electrolytic capacitors to be our favorite so that's what we are incorporating. Vintage-style, rare polystyrene foil capacitors are used throughout. High-current Metal can, not plastic, BC107B and BC109C transistors imported from the UK are used throughout the amplifier stages. These metal transistors are better than their plastic counterparts when used in an Audio circuit. A single circuit board offers a vast sonic improvement over 5 separate boards found in a 1073 eliminating the use of multiple edge-board connectors and redundant wiring. The hook-up wire is also imported from the UK and is hand assembled to "Military Spec". The enclosures are CAD designed to 1/1000" tolerance and are bright-nickel plated with PEM nut hardware throughout for solid construction. Finally, we CNC mill the custom-designed anodized aluminum knob-set which gives the module character. The boost and cut knobs are solid brass with shiny nickel plating. The knob markers are white plastic dowels embedded in the knob so the white mark will never wear off. We also provide an optional "Vintage Look" faceplate in RAF grey. Additionally one person, our best master craftsman, builds every single PEQ1 series, from PCB to testing. A PEQ1 series Mic-pre/EQ is one of the best pieces of gear made anywhere in the world, in any given year. For those who want to listen and can't make it to our showroom in Austin, we really encourage that you A/B test our PEQ1 with any other Mic-pre/EQ. Finally, If you want the absolute best Wunder Audio has to offer, if you want to use the best sounding mic-pre/equalizer in the world, if you get as flat-out hyped up about chasing perfection and embracing the ultimate in excellence like we do, you have to consider the PEQ1.

Specifications

 

Length 9.45 in
Diameter 2.48 in
Transducer Type Condenser
Polar Pattern Cardioid, Omni-Directional
Number of Microphones Single Microphone
Impedance Electrical: 200 Ohms
Frequency Range 20 Hz - 18 kHz
Sensitivity Cardioid: -32 dBV/Pa (25 mV) / Omni: -37.1 dBV/Pa (14 mV)
Max. SPL 128 dB