The Wunder Audio CM7-GT (Glass Tube) uses a NOS Telefunken glass tube, which
replaced the VF14/EF14 in 1960-1979. The CM7-GT has 9 patterns
selectable from the PSU. The CM7-GT Circuit is basically the same as
the CM7 with extra circuitry added to achieve the remote pattern
changing. The CM7-GT use a PCB. The critical high impedance parts are
assembled point to point. It also uses the same custom wound "large
style" Neumann U47 transformer that we use in the CM7. The CM7-GT uses
the identical grille setup as the original U47 and the CM7.
The CM7-GT comes standard with the K47 capsule which is identical to
the original K47 used in the later versions of the original U47
(1959-1964). The M7 capsule can be special ordered in the CM7-GT for a
$200 up-charge. The connector at the bottom a 3/4 size Tuchel
connector used on the U67/M269.
Package includes: The CM7-GT microphone system comes complete with a
NOS Vintage Telefunken glass tube, a new K47 dual membrane capsule, a
historically accurate "large style" BV8 transformer power supply made
in the U.S.A., tube mic cable, wooden microphone box, and 1-year
warranty.
"All Wunder Audio Microphones are hand made in the U.S. because we want to keep the quality of the metal work on same level as the early microphones, this is not is not achievable with modern CNC machinery, wildly used in China. Capsules, grille heads, rails, fine sanding surface on bodies, welding of capsule holders and baskets are purely a hand made process".
All models are now shipping with:
Very high end USA made Historic Appearance PSU's
Historic Appearance Serial number Badges on Mic and PSU. CM7 and CM7GT ships with a Historic Appearance higher quality Shockmount.
Manufacturer's Note:
We measured quite a few original M7 capsules and found that depending on the serial number stamped on the capsule itself or production run of the M7, the backplate had a different backplate depth. This corresponded to different Frequency Response curves.
We just started shipping the V17 version of the Berlin M7 as an option in the CM7. The V17 has the warmer sound that is found in later U47's. The earlier capsule, the V15 has been shipped in all our CM7's up until recently. Although this version was extremely very well received occasionally someone would compare the CM7 to a later U47 (after ser no.
1000) and found the U47 warmer. Knowing what accounted for this we incorporated this capsule into our mics as an optional choice.
Not to make things more confusing, we are also tuning both the V15 & V17 into subgroups according to their nominal capacitance. The V17 ranges from 78-83pF. This is the exact value on M7 capsules found in original U47's (from approx. serial number 1000-5800 according to Neumann data compiled from Jan-Feb 1959).
The V15 range from 88-93pF. The higher Pico farad value yields brighter upper mids. Two of our test microphones are Neumann U47 serial no. 007 and
071 circa 1949. I actually had these microphones tested by Neumann in 2001 and noticed the higher boost at 5k than the later mics. This extra brightness, however, makes the track "sit" in the mix without having to use EQ. This V1.5 capsule started shipping in 2005 as the standard capsule in the CM7.
A musician would compare these options to the variations in found guitar strings or Trumpet mouthpieces.
The V15 & V17 frequency response sweeps are were consistent with the V17 having relatively 2dB less upper mid boost. These findings were identical for a later number U47 serial number 4324. (See Frequency Response chart below)
Original Manufacturers Description
Technical Documents
Specifications
Brochure
Product Manual
Recall Sheet
User Testimonials
"I stopped using a vintage U48 in favor of this mic. Character for days with all the body of vintage Neumann mics, but more headroom and a little faster transient attack for a modern mix." Jeremy Harding
Jeremy Harding is an engineer, producer, musician, DJ and manager whose 2 Hard recording studio (and label of the same name) has a prominent hold on the music scene in his native Kingston, Jamaica. Learn more about Jeremy and his favorite gear in our Producers Corner.
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