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HERITAGE AUDIO

73-DI-One

D.I.

Single channel Class A JFET input, custom low impedance transformer, 15dB pad, ground lift, gold-plated jacks, phantom powered, rugged steel enclosure

$344.00 CAD
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Description

The Heritage Audio 73DI ONE is a single-channel active DI box crafted to deliver the unmistakable warmth and musicality of a vintage 73-style preamp, now optimized for direct instrument recording. Designed with the same Class A, transformer-coupled topology that defines the Heritage Audio sound, the 73DI ONE brings out the full tonal richness of your instrument-whether you're tracking a passive bass, electric guitar, analog synth, or vintage keyboard. Its high-impedance JFET input stage (2.2M ohm) ensures clarity and response, while the custom-designed 73-DI output transformer adds that signature analog saturation and low-mid character associated with classic British preamps.

More than just a tone box, the 73DI ONE is engineered for professional reliability. Housed in a rugged, road-ready aluminum enclosure with recessed connections for hassle-free handling, it's equipped with a 15dB pad for hot signals, a ground lift switch to eliminate hum, and gold-plated input, thru, and XLR output connectors to maintain signal integrity. Fully phantom-powered via standard +48V, the 73DI ONE is easy to integrate into any studio or live setup. Whether you're after subtle warmth or bold analog color, the 73DI ONE delivers direct signal capture with vintage soul and modern precision.

Features

Single-Channel Active DI Box: Captures the full tone of your instrument with clarity, warmth, and vintage character.

73-Style Class A Circuitry: Based on the classic 73 preamp design for rich harmonic content and dynamic response.

JFET Input Stage: Provides high headroom and works beautifully with guitars, basses, keys, and more.

Custom Output Transformer: Delivers balanced, isolated signal with low impedance and signature analog tone.

15dB Pad Switch: Handles hot signals and supports use with speaker-level sources.

Ground Lift Switch: Reduces unwanted hum and noise from ground loops.

Gold-Plated Connectors: Ensures clean signal flow and long-lasting durability on all jacks and XLR output.

Phantom Power Operation: Powered by standard 48V phantom with LED status indicator.

Low-Noise Design: Built on a military-grade circuit board with full ground plane for quiet performance.

Durable and Road-Ready: Enclosed in a rugged steel chassis with recessed jacks for protection on stage or in the studio.

Specifications

General Specifications:

Model 73DI ONE single channel active direct injection box

Class A JFET discrete input stage

Operates on standard 48 volt phantom power

Phantom power status indicated by red LED

Rugged 14 gauge steel enclosure

MIL spec circuit board with full ground plane

Single channel configuration

All connections recessed for protection

Input and Output:

High input impedance 2.2 megohms

Input connector gold plated quarter inch jack

Thru connector gold plated quarter inch jack

Output connector gold plated XLR

Output transformer Heritage Audio custom designed low impedance 73 DI transformer

Output is transformer isolated

Performance and Features:

Based on 3 transistor 73 style Class A topology

Output stage uses metal can 2N3055 transistor

15 dB pad switch

Ground lift switch

Outstanding signal integrity and low noise performance

Superior noise rejection

Capable of handling instrument and speaker level signals

Suitable for guitars basses keyboards synths and other audio sources

Mechanical and Durability:

Durable metal toggle switches rated for over 25000 cycles

Protective aluminum case design for road use

Internally shielded design to prevent interference

Compact and portable format for studio or live applications

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