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 a serious pro-studio workhorse because it has a very nice top and bottom, and brings out a natural sound from any source.
Our 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. This proper vintage mesh gauge is not the readily available metric gauge and is vastly important for the legendary sound of a U47.
The diaphragm in our 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.
Our backplate is brass and precision milled by hand in Switzerland to the original rim height 15/10000th inch specification within one-micron tolerance. (0.0000393701”). 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 3 mounting isolation rims, true to the vintage Berlin M7 and superior to the Gefell M7 which has only 2. Our capsules are then sent to Germany, where they have perfected the craft of skinning them in gold.
We've put a modern upgrade to the original vintage NOS Telefunken EF14 tube to achieve the same specs as the VF14. Our 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. 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, we slightly modify the filament load to achieve this resulting in identical results to the VF14.
We've optimized our passive components to achieve a true audiophile performance.
We've enhanced our true to vintage microphones by utilizing the Suprema Silver Gold Oil capacitor which is the highest quality capacitor available today. These capacitors are so quiet and really let you look very deep into the recording! This results in a modern-vintage sound where the spectrum opens up, adding emphasis to the sound staging and creates a greater sense of air and transparency, without the impression of a diminished mid and lower-end response. The outcome is a less grainy and a much more fluid sound. The focus is tighter and sharper.
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 is 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. 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.
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. Our 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. The PSU can be plugged into any voltage in the world without having to jumper a voltage setting switch. Inside, we've incorporated extremely accurate 30 turn trim pots so we are able to fine-tune all of the voltages.
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 encased in a precision velvet-lined thick foam tweed case that also holds your PSU, your shock mount, and your cables. The tweed carrying case uses the same Fender tweed found in a vintage Fender guitar case, 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.