Heritage Audio 73-DI-ONE – Active 1-channel Vintage-style Direct Box with Ground Lift, -15dB Pad, and Thru Output

Heritage Audio is proud to introduce the 73 DI ONE, custom-made transformer-equipped 73-Infused active single channel D.I. box for exceptional professional studio recording, as well as live use.

A DESIGN THAT HAS BEEN 15 YEARS IN THE MAKING AND MORE THAN 50 YEARS OF HERITAGE

It’s no secret that we are lovers of the 73 topology since the very beginning of Heritage Audio, especially the 3055-driven transformer coupled Class A output stage which is the trademark of that sound. After years of consideration, we’ve managed to adopt the legendary 3-transistor topology circuit to serve as the best DI you could ever get, at any price range.

BRING OUT THE TRUE TONE OF ALL YOUR INSTRUMENTS

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 them directly into a PA or recording system is required. Passive basses such as P-Bass and Jazz Bass suddenly acquire a new life, with a sparking 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 EPs growl like they’re being amped without the hassle. The list goes on and on.

AND ENHANCE YOUR SIGNAL WITH JUST THE RIGHT TOUCH OF VINTAGE WARMTH AND VIBE

This meticulously engineered design is what gives the 73 DI 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 extruded aluminium case makes the 73 DI virtually indestructible and totally roadworthy, with all connections recessed for idiot-proof operation. Available in single and dual channel configurations with a pending 8-channel version.

• Single channel active DI box.


• Class A, JFET discrete input stage as seen on all Heritage Audio top of the line products.


• Low impedance custom Heritage Audio designed 73-DI output transformers.


• Outstanding signal integrity and superior noise rejection.


• Rugged 14-gauge 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.


• 15dB pad.


• Ground lift switch.


• Input / Thru gold-plated jacks.


• Gold-plated XLR output.


• Operated by standard +48V phantom power with red LED indicator light.

• Single channel active DI box.
• Class A, JFET discrete input stage as seen on all Heritage Audio top of the line products.
• Low impedance custom Heritage Audio designed 73-DI output transformers.
• Outstanding signal integrity and superior noise rejection.
• Rugged 14-gauge 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.
• 15dB pad.
• Ground lift switch.
• Input / Thru gold-plated jacks.
• Gold-plated XLR output.
• Operated by standard +48V phantom power with red LED indicator light.