SKU: 27609243989

Heritage Audio 73-DI-ONE One Active Single Channel DI Box

Sale price$150.30 Regular price$167.00
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Description

Heritage Audio 73-DI-ONE One Active Single Channel DI BoxInject virtually any passive instrument in your repertoire with vintage warmth and life with the Heritage Audio 73DI One, a DI box based on the classic 73 style preamp with a high impedance JFET on the input and a balanced, transformer isolated output stage. With the custom built transformer, you can enhance bass, keys, synths, and more with wonderful low mid saturation. The discrete Class A JFET input stage is the same found on all of Heritage's top

Inject virtually any passive instrument in your repertoire with vintage warmth and life with the Heritage Audio 73DI One, a DI box based on the classic 73-style preamp with a high-impedance JFET on the input and a balanced, transformer-isolated output stage. With the custom-built transformer, you can enhance bass, keys, synths, and more with wonderful low-mid saturation.

The discrete Class-A JFET input stage is the same found on all of Heritage's top-of-the-line audio products. The 73DI One offers excellent signal integrity and superior noise rejection thanks to its premium circuit components and gold-plated I/O connectors. The DI box provides a -15 dB input pad for overly hot signals and a ground-lift switch for eliminating grounding loops. The enclosure is constructed from durable 14-gauge steel for complete protection of the internal MIL-spec PCB. Along with metal switches, this DI box is built to last, even under intensely rigorous usage. Input and thru jacks are 1/4" and the output is over XLR 3-pin. The unit runs on standard +48V phantom power and sports a red LED indicator light to let you know it's circuit is receiving power.

A Design 15 Years in the Making

Heritage Audio have been lovers of the 73-style topology since the very beginning. After years of consideration, they've managed to adopt the legendary 3-transistor topology to provide a top-notch DI at a reasonable price. The first transistor in the 73 stage was substituted by a J109 JFET, yielding a 2.2-megohm input impedance instead of the 47 kilohms in the original circuit.

A clever design on the power supply section allows it to keep the metal can 2n3055 output transistor that directly drives the custom-developed silicon steel grain-oriented output transformer, which is a phantom power-friendly version of the venerable LO1166, custom built to enhance the natural performance of your instrument in the same, unique way that a vintage 73 preamp will enhance a mic signal.

Versatile and Pristine

Being a transformer-based unit, its output is isolated from the instrument and there is a further provision for lifting the ground, as well. An additional -15 dB pad switch helps with hotter instruments and even allows speaker outputs to be plugged into the 73DI One. A thru parallel connection rounds out the pack, and all I/O jacks are gold plated and isolated from chassis.

Bring Out the True Tone of Every Instrument
Usually, active DI boxes work best with passive circuitry instruments like guitars and basses, but thanks to the 73DI’s high-input headroom, it can also be used wonderfully on keyboards, synths, drum machines, and samplers when plugging directly into a PA or recording system is required. Passive basses such as precision and jazz bass suddenly acquire a new life, with a sparkling high end, a solid bottom end, and that low midrange saturation the 73 is famous for.

Instruments like the Fender Rhodes produce their full body and bell-like tone like never heard before. Saturation makes Wurlitzer electric pianos growl like they’re being amped without the hassle. The possibilities are endless.

Just the Right Touch of Vintage Warmth and Vibes

This meticulously engineered design is what gives the 73DI its outstanding performance, delivering a rich, dynamic direct sound that fully captures the harmonic complexity of any instrument and even pre-recorded tracks. An attractive yet protective 14-gauge steel enclosure with MIL-spec circuit board makes the 73DI virtually indestructible and totally roadworthy, with all connections recessed for dumb-free operation.

Features

  • Ideal for Passive Instruments
  • Based on Vintage 73-Style Preamp
  • 3-Transistor Topology with J109 JFET
  • Custom-Built Transformer
  • Transformer-Isolated Output
  • Selectable -15 dB Pad and Ground Lift
  • 1/4" Input & Thru Jacks, XLR 3-Pin Out
  • Gold-Plated I/O Jacks
  • Rugged 14-Gauge Steel Enclosure
  • Operates on Standard +48V Phantom Power

Specifications

Item Type
Standard DI
Number of Channels
Single-Channel
Active/Passive
Active
Circuitry
Solid-State (JFET)
Preamp
Pad
-15 dB
Ground Lift
Yes
Polarity Reverse
No
EQ & Tone Shaping
Low-Cut/High-Pass Filter
No
Connectivity
Audio I/O
1x 1/4" TRS Balanced Input
1x 1/4" TRS Balanced Thru
1x XLR 3-Pin Balanced Output
Performance
Input Impedance
2.2 Megohms
Power
Operating Voltage
48 V (Phantom Power)
Physical
Dimensions
8 x 6 x 4" / 20.3 x 15.2 x 10.2 cm
Weight
1 lb / 0.5 kg
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 27609243989

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★★★★★ 3
My Dog Loves It, But Be Careful
My dog absolutely loves the Benebone Wishbone Chew Toy—he gets so excited every time I bring it out. It’s clearly made for aggressive chewers and is very durable, but he often ends up hurting his teeth while chewing on it. I wish it were a bit gentler on his mouth. Great for keeping dogs entertained, just watch out if your pup has sensitive teeth.
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Reviewed in the United States on January 21, 2026
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shdwmac
Dallas, US
★★★★★ 5
My dogs LOVE these over the leading brand!
My dogs LOVE these chew bones! They will chew on these things for 30 minutes straight. They will dig them out from the dog basket, or whine at the door if they left it outside. I ended up having to get all 4 of my dogs each their own it was so popular. The white bone in the picture is the from the leading brand and you can see which one they go for, lol. They've had these bones for 6 weeks now and chew on them daily, and multiple times throughout the day. If your dog is a chewed or puppy, definitely give these a try!
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Reviewed in the United States on April 5, 2026
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Amanda
Louisville, US
★★★★★ 5
🐾Ridiculous aggressive chewer🐶
Style: Stick, Flavor Name: REAL Bacon, Size: Medium
Sooooo happy I finally found something that my moms pup couldn't chew up! Not going to like its been very tough. She has now for at least a week (sorry days pushing together 🤪) Let's just say the pup is a chihuahua mix that LOVES to chew. Emphasis on the chewing youre lucky if a toy lasts more than a day let alone a week 🤣 This is so durable I may not need one for her for a while but this will come HIGHLY recommended for ridiculously aggressive chewers. Suitable for ang size dog just make sure you go one size bigger then you think you should. Quick easy chew toys but definitely has some weight to it.
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Reviewed in the United States on May 18, 2026
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Jeff Stokes
Lexington, US
★★★★★ 5
Stands Up to Strong Chewers Without Splintering
Style: Stick, Flavor Name: REAL Maple Wood, Size: Giant
We got the Benebone Maplestick in Giant size for our large, aggressive chewer, and it has held up remarkably well compared to other chew toys we’ve tried. The real maplewood core mixed with durable nylon offers a satisfying chew texture; it feels substantial without being brittle, and our dog goes after it consistently during free play or after meals. It’s noticeably tougher than many rubber or soft plastic toys, yet it doesn’t splinter into sharp pieces, which gives me confidence in regular use. The shape and size are also well suited for bigger mouths, and the way it’s angled makes it easy for a strong chewer to get a grip and work away at the surface. Cleaning is simple, and over weeks of use we’ve seen only normal wear rather than shredding or chunks missing. As someone who’s tried multiple toys claiming “for aggressive chewers,” this one genuinely lives up to its reputation in my experience. While no chew toy lasts forever with a powerhouse chewer, this one’s longevity feels above average without resorting to metal or stone alternatives that can be too hard on teeth. For everyday chewing and play, it strikes a solid balance of durability and engagement.
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Reviewed in the United States on March 2, 2026
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TurboInThailand
Charlottesville, US
★★★★★ 5
Our dogs love them and they hold up well.
Style: Fishbone, Flavor Name: REAL Jack Salmon, Size: Large
The dogs love them and are very durable! I recommended to a friend who has a strong chewer and his dog loves them too. They like all varieties but particularly the fish flavored ones. Any kind of chew toy made out of any cloth even cordura is ripped up in minutes but they chew on these for hours.
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Reviewed in the United States on April 29, 2026

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