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Signal Art Electronics U47 Vacuum Tube Microphone - Used  From Other

Dual Pattern Tube Microphone (Cardioid and Omni) based off the Legendary U 47.


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Sound Pure's dedication to pre-owned products is unprecedented in the industry. We are a small team of dedicated experts that buys, trades, and consigns. We are trusted by customers all over the world. Our curated collection, is thoroughly tested and inspected by some of the best in the business. Our inventory is constantly changing, ever-evolving, with some items sold before reaching the website. Looking for something specific? Have questions about this product's condition or history? Want more photos, or to simply chat with an expert who's had his hands on this actual piece? Contact us now.
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Manufacturer's Description from Other

This listing is for the Standard Version U47 - however, the below description is for the PREMIUM Version, as there is no description available online for the Standard Edition:


Our premium edition 47 is an elegant, open, detailed, clean, clear, rich, authentic sounding 47 microphone that we believe stands up perfectly well against microphones costing 2, 3, even 5x what we are asking.  Using nothing but the absolute best parts available and putting meticulous TLC into the build, the premium edition 47 is build to last a lifetime and create beautifully captured takes.  

The tube compliment is a matched pair of Western Electric 408a (6028) pentode valves that we have selected, cleaned (pin descaling), tested, and burned in.  We have tested every 408a variant out there over the years and to us, the Western Electric has the perfect balance of weight, presence, top end, and midrange.  It is neither muddy, nor bright and anemic, as some variants we have sampled.  To that end, we have invested in one of the largest reserves of this tube variant, to ensure a consistent product.  Each 408a is fitted with a custom tube damper ring made for us by hi-fi expert Sandy Levy using pure aerospace (high temp rated) silicon. 

We use mostly teflon coated silver hookup wire internally, and hand make both the 7 pin and 3 pin XLR cables using Gotham's finest cable stocks available from Gotham Audio LLC, the US division of the legendary high end cable manufacturer.  We include a premium hospital grade IEC power cable.

Our power supply enclosure is manufactured to our specs, and made twice as dense as most other power supply enclosures.  This box is practically indestructible.  Inside is a beautifully hand-wired power supply starting with a shielded, over-spec'd hospital grade toroidal supply transformer, fed by an over-sized and shielded Corcom AC input EMI filter, and made with our own lab-grade '47 PSU PCB and premium Nichicon and other long-life components.

For this premium edition, we use a custom wound BV8 transformer made in the USA.  This transformer is a true BV8 in every sense of the word, utlizing the same original winding technique and turns ratio as well as the same size UI30 laminations as the original German part.  The results are simply open, rich, and musical.  This part is based on a meticulous study of our own personal favorite vintage BV8 specimen.  It was prototyped many times until we matched the exact sonic character, bandwidth, tone, and THD profile of our favorite vintage German part.

With the premium edition 47, we also include an extra selected (noise graded, cleaned, and tested) pair of 408a tubes, and a handmade 6ft. IEC power cable using shielded Gotham AC power cable and Wattgate audiophile grade connectors.  We also include a custom made wood box for the 47.

Other (Miscellanous Used/Vintage/Consign)

About Manufacturer

Here at Sound Pure we hand-select used and vintage pieces of gear for our inventory. Our used selection always reflects the high standards of quality and craftsmanship that we expect from all of our manufacturers.   We are a small team of dedicated experts, located in Durham, NC.  We buy, trade, and consign instruments that we truly believe in.  Because of this, we have developed a reputation of quality and trust with our customers, located all over the world.   Our best customers are the ones that truly understand our personal touch and commitment to everything we sell, and range from hobbyists and enthusiasts to some of the biggest names in the business.  Our passion bridges the products we love with the real relationships we develop with our customer - whether they are a lifelong musician, or they are just getting started on their musical journey but care about value, quality, and being treated right.  

We vigorously test everything we take in to ensure authenticity, functionality, and reliability.  We are supported by one of the most well-respected luthiers in the Southeast, guaranteeing products that come in are thoroughly vetted, and that products that go out our in premium, performance- ready shape.   We are so confident in our ability to provide the highest quality music equipment in the industry, we even invented our “Try Before You Buy” program where we can ship out a product before collecting actual payment. 

Sound Pure's inventory is constantly changing, ever-evolving, with some items sold before reaching the website.    Looking for something specific? Have questions about this product's condition or history?  Want more photos, or to simply chat with an expert who's had his hands on this actual piece of gear?  It is truly our pleasure to talk with our customers, please do contact us now.