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Heritage Audio 73-DI-2 Active Two-Channel DI Box SKU# 73-DI-2

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nject virtually any passive instrument in your repertoire with vintage warmth and life with the 2-channel Heritage Audio 73DI 2, 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 2 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. As a two-channel DI box, two input and two thru jacks are provided over 1/4" while the two outputs are 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 2. 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 73 DI’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.
  • Rugged steel enclosure prevents PCB stress and potential component failure
  • MIL-spec circuit board with full ground plane for ultra-quiet operation
  • Durable metal switches rated for over 25,000 cycles
  • Gold-plated I/O jacks for corrosion resistance and signal integrity
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
Items Included
  • Heritage Audio 73DI 2 Active Two-Channel DI Box
Limited 1 Year Manufacturer Warranty

$ 499.00 499.0 $ 499.00

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