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HERITAGE AUDIO

73-DI-2

D.I.

Dual channel Class A JFET input, custom low impedance transformers, 15dB pad, ground lift, gold-plated jacks, phantom powered, ultra-quiet operation

$499.00 CAD
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Description

The Heritage Audio 73DI 2 is a dual-channel active DI box designed to capture the rich, musical character of a vintage 73-style preamp-now reimagined for direct instrument and line-level recording. Whether you're in the studio or on stage, this unit brings a legendary sonic signature to any setup, with a carefully engineered Class A JFET input stage and transformer-balanced outputs modeled after the iconic LO1166. Each channel is built around a 3-transistor topology that has defined the 73 sound for decades, offering both harmonic warmth and pinpoint clarity with an impressively high input impedance of 2.2M ohm-ideal for everything from passive basses to synths and samplers.

The 73DI 2 isn't just about tone-it's built for professional performance and longevity. Each channel features a 15dB pad, ground lift, and parallel Thru connection, making it easy to integrate into any studio or live rig. A custom-designed silicon steel transformer ensures low impedance output and superior noise rejection, while the robust 14-gauge steel chassis and MIL-spec circuit boards ensure this DI box can handle the demands of regular touring or heavy studio use. Powered by standard +48V phantom power, the 73DI 2 delivers that unmistakable analog depth and character-perfect for basses, electric pianos, acoustic instruments, and any source in need of that vintage 73 touch.

Features

Dual-Channel Active DI Box: Designed for capturing instruments with clarity, warmth, and classic analog character.

Vintage 73-Inspired Sound: Infused with the tone and richness of a classic 73-style preamp circuit.

Class A Discrete Input Stage: Uses a JFET-based input for smooth, dynamic response and high headroom.

Custom Output Transformers: Delivers balanced, isolated output with a full, harmonically rich tone.

15dB Pad Switch: Handles hotter signals and allows use with speaker-level outputs.

Ground Lift Switch: Helps eliminate hum and buzz caused by ground loops.

Gold-Plated I/O Connections: Ensures long-lasting performance with low signal loss and corrosion resistance.

Phantom Power Operation: Runs on standard 48V phantom power with LED status indicator.

Ultra-Quiet Performance: Built with a MIL-spec circuit board and full ground plane for minimal noise.

Road-Ready Construction: Encased in a rugged steel housing with recessed connectors for durability on stage or in the studio.

Specifications

General Specifications:

Model 73DI 2 dual 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

Dual channel configuration

All connections recessed for protection

Input and Output:

High input impedance 2.2 megohms

Input connectors gold plated quarter inch jacks

Thru connectors gold plated quarter inch jacks

Output connectors gold plated XLR

Output transformers Heritage Audio custom designed low impedance 73 DI transformers

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 per channel

Ground lift switch per channel

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 footprint for studio or stage integration

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