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New & Current Vintage King Card Holders

$ 999 .00
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Please note: this item is available for purchase in the United States only.

Useful Arts BF-S Pro DI

Tube instrument preamp/DI with 20 million ohms input impedance, Class A tube preamp, 2-band EQ, low-gain/high-gain operation, thru jack, balanced/unbalanced outputs, and linear power supply

Product Description

The concept behind the Useful Arts BF-S Pro DI is simple. Useful Arts took the audio circuitry of the BF-1 and coupled it with the linear power supply from the SFP-60. The result? Astounding clarity, headroom and noise specs that only come with the nearly-noiseless high voltage that a linear power supply can deliver.

Which one is right for you? Both have identical feature sets and audio circuitry, except the BF-S adds a ground lift for its XLR output. The BF-1 features a switching power supply, which is light, compact and convenient (no changes needed to adapt to any line voltage in any country). It's also convenient for live use and will fit in most guitar cases. With its compact size, the BF-1 has a noise floor of about 60 dB. ​ With its heavy-duty linear power supply, the BF-S has a noise floor of better than 70 dB - almost unheard of for tube gear. With this power supply, the BF-S is flat from 15 Hz to 80 kHz (-2 dB)!

The BF-S weighs a good bit more than the BF-1, and is encased in a powder coated steel enclosure to withstand the rigors of daily use on a tracking room floor. ​ Most tube DIs start with the design philosophy of a guitar amp. Not the BF-S.

The BF-S is designed to complement the amp, while at the same time offering a different method of impedance conversion that delivers clarity and depth for recording.

DI recording is usually a bit of a bummer. Even with a really good DI, electric instruments sound lifeless at best, or tinny at worst. The BF-S sounds exuberant - adding just a touch of second harmonic to make the subjective listening experience compelling without sounding like the instrument has been altered in any way. Instruments just sound alive.

Product Specifications

Condition New
Chassis Desktop
Impedance 20,000,000 ohms
Input Connectors 1/4-inch TS, Analog XLR
Output Connectors 1/4-inch TS

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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.
Noa L.
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!
Robby T.
I would recommend Vintage King to any one looking for top-class gear, unbeatable customer service and the best prices on the map!
Jake D.
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.
Michael D.
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.
Thomas W.
I am a new customer of yours. You guys provided me the absolute best deals in ordering all the equipment to power my brand new recording studio. Your customer service is amazing and i will always deal with you from here on out.
Rob M.
Thanks for your great service and getting this out today. You guys really are the Kings!
Alan B.
Better than expected! Truly impeccable service. Your team was professional, knowledgeable, provided speedy delivery above and beyond standard. Vintage King Audio is definitely my go to for all of my audio and information needs.
James O.