The WA-47 is an all vacuum tube, large diaphragm, transformer balanced, multi-pattern (9), large condenser microphone, based on the classic ‘47 that has been used on countless hit records for the last 50+ years. The WA-47 is designed for pro studio, home studio, live, and broadcast applications and sounds great on vocals, acoustic/electric guitars, acoustic/electric bass, drums, piano, strings, brass/woodwind instruments, and an array of other sources. The classic ‘47 became extremely popular in the 1960’s and is now considered one of the greatest microphones ever made. The classic ‘47 is still widely used today in professional recording studios but have become extremely rare and expensive to acquire.
A look inside
The WA-47 utilizes a custom reproduction of the vintage k47 style capsule that was used in the classic ‘47 microphone – designed with the same hole pattern and frequency response. Our version of this capsule (model# WA-47-B-80v) is carefully manufactured by an Australian capsule manufacturer who’s precision and repeatability allows us to nail the vintage sonics of the most important sonic piece of this classic style of microphone.
A Slovak Republic JJ 5751 vacuum tube is a lower gain, low noise tube that forces much of the sonics of the capsule and transformer to be heard more significantly than some higher gain tubes might allow. We auditioned 4 different tube brands and fell in love with the JJ 5751. The frequency response of the JJ 5751 and the way it contributes to the circuit is tonally smooth and vintage in nature.
The WA-47 utilizes an American made TAB-Funkenwerk (AMI) USA transformer with large core imported German laminations. This transformer helps provide the creamy smooth top end, and the LARGER THAN LIFE bottom end one would expect from a ’47 style condenser microphone.
The WA-47 uses a polystyrene coupling capacitor for uncompressed top-end response from the capsule, wima film capacitors throughout, and an imported Solen French capacitor on its output driving the TAB-Funkenwerk (AMI) USA output transformer.
One component of a tube microphone often overlooked is the 7 pin cable that connects the microphone to its power supply. When auditioning the WA-47 and other tube microphones we learned quite a bit about 7 pin cables and how the shielding and wire gauge size can drastically change the sonics of a tube microphone. We have partnered with Gotham Audio in Switzerland to use their very carefully built top-end 7 pin GAC-7 cable. Using this cable increases top end presence and the overall size of the recorded image in the stereo field, by reducing phase shift and the parasitic effect often found in poorly built cables. Gotham Audio is very expensive and boutique in nature and should not be considered a small addition to the WA-47 package.
Download Product Manual
Custom true ’47 capsule reproduction (k47 style) – Model# WA-47-B-80v
Capsule makeup: Gold sputtered, dual large diaphragm, single backplate, 6 microns NOS mylar (PET film)
TAB-Funkenwerk (AMI) USA output transformer
JJ Slovak 5751 vacuum tube
Gotham 5 meter GAC-7, 7-pin tube microphone cable
Wima, Solen French, and Polystyrene capacitors
Polar Patterns: 9 patterns – Cardioid, Omni, figure-of-eight + 6 mixed patterns
Dynamic range: 130dBA
Maximum SPL: 140dB (<0.5% THD) Frequency Range: 20 Hz~20 kHz Output Impedance: 200 ohms Rated Load Impedance: =2kOhms S/N Ratio: 82dBA Equivalent Noise: 10dBA (IEC651) External IEC grounded PSU Total Weight - 9 lbs Mic Diameter: 60mm Mic Length: 254mm Includes: Microphone, Wood box, Power Supply Unit, Shockmount, Gotham 7 pin GAC-7 cable, IEC power cable