The Advanced Audio CM47ve Tube Microphone is a large dual-diaphragm, multi-pattern, tube condenser microphone inspired by the famous Neumann U-47.
The CM47ve is a great choice for vocals, horns, acoustic instruments, and excels in front of bass and guitar amps. The CM47ve provides response within +or - 1.5dB of a U47 microphone made after 1958.
Capsule
The Advanced Audio CM47ve features our AK47 capsule. The AK47 is an exact reproduction of the early Neumann K47. The AK47 is a 32mm capsule with single back-plate, random drill pattern and is skinned with 6 micron mylar and a brass surround like the 1959 k47. The CM47ve yields a more vintage, 'darker' response curve than our CM47 above 10kHz but has a very present sound with a slightly wider proximity effect than the CM47.
Circuit
The circuit is based on the very hifi 6072 tube optimized with a state of the art two-stage Class "A" CCDA design. This circuit provides a much lower output impedance with more headroom than the circuit used in the original U47. The lower output impedance provides a faster damping factor when driving the BV8 type transformer, delivering a better transient response than the original design. Selected 6072a tubes are some of the quietest tubes made, and are much less susceptible to microphonics than the metal-clad vf14 tubes used in the original U47 tube microphone. The dual-bobbin output transformer with its hum bucking configuration and our optimized circuit will deliver > +14dBu with less than 1% distortion. The output transformer is driven with a 2.2 ufd metal-film capacitor to take advantage of the transformer’s response down below 20Hz.
Advanced Audio CM47ve Tube Microphone Features
- 1.0” (32mm) Ak47 single back plate, 6-micron skinned mylar capsule
- Capsule polarization 60v on the back-plate
- 9 selectable pickup patterns remotely switched from the power supply
- Dual bobbin BV8 (6.5:1 ratio) output transformer
- Selected 6072a tube Class A dual stage (CCDA)
Advanced Audio CM47ve Tube Microphone Specifications
- Frequency Response: 20Hz to 20kHz +/–3dB
- Noise: <15dB (A-weighted)
- Impedance: < 200 ohm (load impedance <1.2K)
- Distortion: < 0.5% @128dB
- Maximum Output: > +14dBu with less than 1% distortion
Advanced Audio CM47ve Tube Microphone Includes
- Advanced Audio CM47ve Tube Microphone
- Power Supply
- Tube Cable
- Shockmount
- Radcase
- Manufacturer Warranty
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