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Warm Audio WA47 Large-Diaphragm Studio Tube Condenser Microphone

Believe your ears! Warm Audio's affordable answer to one of the finest mics ever made, this '47 delivers tube warmth, creamy highs and larger-than-life lows. Rate and review this product
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Warm Audio WA47 Large-Diaphragm Mic

The Warm Audio 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.

As with all Warm Audio products, a focus on quality components ensures the best sounding product possible. The WA-47 is packed with top end components that are carefully sourced from many of the top pro audio component suppliers in the world.

True '47 Style Capsule

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. Every Warm Audio capsule is made in the same small assembly house in a clean-room environment, and packaged in its own protective jewel case until the moment it is loaded into the microphone. Each capsule is visually inspected and electrically tested for imperfections.

A large part of any microphone's tone comes from its capsule, and the true k47 style capsule used in the WA-47 is not easily manufactured or typically found in affordable condenser microphones.

The Capsule

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. The Warm Audio version of this capsule (model# WA-47-B-80v) is carefully manufactured by an Australian capsule manufacturer whose precision and repeatability allows Warm Audio to nail the vintage sonics of the most important sonic piece of this classic style of microphone.

The Tube

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. The frequency response of the JJ 5751 and the way it contributes to the circuit is tonally smooth and vintage in nature.

The Transformer

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 Cable

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 Warm Audio 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. Warm Audio has 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.

The Capacitors

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.

zZounds is an authorized dealer of Warm Audio products.
- 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
- Self-noise: 11dBA
- Dynamic range: 130dBA
- Maximum SPL: 140dB (<0.5% THD)
- Frequency Range: 20 Hz~20 kHz
- Output Impedance: 200 ohms
- Rated Load Impedance: 2k Ohms
- S/N Ratio: 82dBA
- Equivalent Noise: 10dBA (IEC651)
- External IEC grounded PSU
- Includes: Microphone, Wood box, PSU, Shockmount, Gotham 7 pin GAC-7 cable, IEC power cable
- Total Weight: 9 lbs
- Mic Diameter: 90mm
- Mic Length: 254mm
Weight, Dimensions, and Manufacturer Part Numbers
Shipping Weight: 12 lbs
Shipping Dimensions: 20 x 14 x 6 in
Manufacturer Part Number (MPN): WA47
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