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Teegarden Audio FatBoy Tube DI-NI

Vacuum tube direct box with nickel transformer
MFR# Fatboy Tube DI

Product Description

There are many fine sounding vacuum tube direct boxes on the market. However, in Teegarden's listening tests, none of them compare to the air and depth delivered by the Teegarden Audio Fatboy Tube DI. Simplicity and perfection meet.

As veteran recording and design engineers, Teegarden knew what they wanted to hear when they set out to bring the Fatboy Tube DI to the audio recording community. They, like many of you, have been missing the richness and definition of sound in modern recording equipment. A lot of this was due to a departure from proven classic designs, the use of substandard parts and a slip in quality of manufacturing. The Fatboy puts an end to these practices that were based largely on cutting costs and not improving sound quality.

Teegarden's team of electronic engineers and professional recording engineers are pleased to give you the definitive standard in instrument level direct injection recording – THE FATBOY TUBE DI


  • Vacuum tube (valve) based Direct Injection Box (DI)
  • Legacy design
  • Compact, light weight yet extremely sturdy
  • Hand built in the USA with only the highest quality electronic parts
  • Transformer Balanced LoZ XLR Outputs (Line Level and Mic Level)
  • Pin 1 ground lifts
  • WIll drive line level direct to converters and DAWs

Product Specifications

Condition New

Product Reviews

5 out of 5 stars.
Review Count (1)

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I requested a modified version of the Fatboy that includes the same output from the DI Out into the Thru jack on the front so that I can get tube saturation on my signal back to my stage amp. The device arrived and had power failure within 15 minutes of operation. Contacted Teegarden and received prompt response with their commitment to promptly replace the unit. Received a replacement unit within 2 days. We all ultimately have problems and sometimes DOA and I think Teegarden represents what we all look for in customer service - prompt, professional and determined to satisfy their customers. Great job Bret!

As for the unit itself - lives up to expectation and hype. Excellent tube warmth and tone!

By Craig E on April 13, 2021

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I would like to thank VK for the wonderful sales assistance, service and prices. This was my first purchase with you and it won't be my last. I only wish I'd discovered you years ago!
Matthew R.
I had two Grammy wins this year - Ray LaMontagne & Carolina Chocolate Drops. Both made with help from Vintage King!
Ryan F.
In almost 20 years in Pro audio buying, never did I receive a unit so well packed and exactly as described. Works flawlessly. The whole process has been so smooth. I will never hesitate to do business with you guys in the future and will recommend you to everyone I know.
Martin C.
This was my first experience buying something from Vintage King (although I surf the "used" categories on the website frequently!), and, despite being on the other side of the world, I had absolutely no trouble and everything went very smoothly.
Phil T.
The speed of delivery exceeded my expectations! I was VERY pleased that my shipment arrived in time for a scheduled vocal tracking session. The packing insured that my order arrived safely. And the sales staff responded quickly to questions regarding the product.
James P.
Thank you so much! Vintage King has been so fair and easy to work with. I can't thank you enough. It feels good to trust such a hefty purchase to folks who are so helpful and knowledgeable. Vintage King is a sound designers dream store.
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You guys have excellent customer service and I am excited about the next upgrade I complete on my fifth recording facility. I've been in the studio business for forty plus years. The salesman I worked with at Vintage King was the best of the best. You all rock!
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My experience with Vintage King was excellent. The order was here fast considering it was out of stock. The sales person had SKB send it to me directly and I couldn't have been more pleased.
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From the minute I placed my order I was kept well-informed through each step in your process. Even though I was buying a comparatively modest piece of gear, your attention to detail made me feel like I was purchasing a six-figure mixing desk.
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