73 EQ JR | 500 Series Vintage EQ Module

Heritage Audio 73 EQ JR

• 500 Series analog EQ for advanced engineers
• Faithfully recreates classic British console warmth
• Delivers irreplaceable analog punch and harmonics
• Built-in Class A Line Amp for independent tone processing
• Adds professional-grade quality to vocals, instruments, and mixes

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NT$41,500

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Heritage Audio 73 EQ JR｜Classic British Three-Band 500 Series Equalizer

Inject the Soul of Legendary Studio Consoles into Your 500 Series Rack

The Heritage Audio 73 EQ JR is a faithful recreation of a classic British console's 500 Series Equalizer, featuring a Class A fully discrete circuit design and equipped with hand-wound Carnhill transformers. It perfectly reproduces the warm, punchy, and highly musical sonic characteristics of the golden age of recording. This modular design allows you to integrate one of recording history's most iconic EQ sounds into a modern workflow with a lower barrier to entry.

Compared to the clean precision of digital EQ plugins, the 73 EQ JR, with its classic dual-inductor midrange design and transformer-coupled output, brings irreplaceable warmth, punch, and pleasing harmonic distortion to audio. Whether processing vocals, drums, guitars, or an entire mix, it imbues tracks with vitality and dimensionality, making it a crucial tool for achieving professional-grade sound quality.

Quick Facts Product Overview

Brand: Heritage Audio
Model: 73 EQ JR
Active Electronics: Class A Fully Discrete Circuit
Midrange Design: Dual Inductor Fixed Q
Transformers: Carnhill Hand-Wound
Form Factor: 500 Series Module
Applications: Studio Mixing, Mastering, Vocal Track Processing, Drum Tone Shaping, Instrument Recording

使用者建議分析(點此展開)

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適合誰購買

Mixing engineers seeking the warm coloration and musicality of the classic Neve 1073 EQ, hoping to add analog character to their work.
Music producers who want to add hardware fullness and punch to their digital recording workflow, giving sounds more weight.
Studio users who already own a 500 series chassis and are looking for top-tier tone-shaping tools to expand their sonic palette.

誰不適合購買

Beginners new to recording who have not yet purchased a 500 series chassis and its corresponding power supply.
Users who require precise, narrow Q values for frequency repair (surgical EQ) rather than tone shaping.
Pure 'in-the-box' users who prefer to complete all tasks within software and do not wish to invest in and manage analog hardware.

Heritage Audio 73 EQ JR Core Technologies and Features

Faithful Recreation of Legendary Sound: Fully reproduces the sonic characteristics of the classic 1970s 73-style console EQ, including its famous harmonic distortion, using fully Class A, fully discrete component circuitry to ensure the purest analog signal path.
Powerful Three-Band EQ: Offers highly musical high and low-frequency Baxandall-style Shelving EQs, along with a rich-sounding midrange Peaking EQ based on a dual-inductor design, allowing for broad and natural tone sculpting.
Custom Carnhill Transformers: Both input and output stages utilize Carnhill transformers hand-wound in the UK, which are key core components for achieving the full, powerful, and warm sound of classic British consoles.
Class A Driven Output Stage: Features a Class A single-ended, 2N3055 transistor-driven high-headroom output stage, ensuring sound clarity and punch are maintained even at high gain.
Built-in Class A Line Amp: Equipped with a +6dB to -20dB Class A Line Preamp, allowing it to function as an independent tone processing tool without requiring an external preamp, offering greater operational flexibility.
Optimized for 500 Series: Features an internal soft-start +24V power design, which reduces inrush current during startup, effectively protecting the 500 series chassis's power supply and enhancing overall system stability.
Classic Operating Feel: Utilizes Marconi-style knobs and buttons, which not only offer a vintage aesthetic but also provide a precise and intuitive operating experience, recreating the joy of classic hardware operation.

Technical Specifications (Tech Specs)

Form Factor	500 Series Module
Active Electronics	Class A, Fully Discrete Components
EQ Bands	3-Band
High Frequency Band	+/- 16dB, Baxandall-style Shelving Selectable Frequencies: 10kHz, 12kHz, 16kHz, 20kHz
Mid Frequency Band	+/- 18dB, Dual Inductor Peaking, Fixed Q Selectable Center Frequencies: 0.36kHz, 0.7kHz, 1.6kHz, 3.2kHz, 4.8kHz, 7.2kHz
Low Frequency Band	+/- 16dB, Baxandall-style Shelving Selectable Frequencies: 35Hz, 60Hz, 110Hz, 220Hz
Line Amp Gain	+6dB to -20dB, Class A
Input Impedance	Bridging, Balanced and Floating
Transformers	Carnhill Hand-Wound (Input and Output)
Power Source	Requires power from a compatible 500 series chassis

Pros & Notes (Click to expand)

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Pros

Faithfully reproduces the warm coloration and musicality of the classic 1073 EQ, injecting analog soul into digital audio.
Utilizes premium Carnhill transformers and Class A circuitry, with robust components and exceptional sound quality.
Wide range of selectable frequencies, allowing easy adjustment from low-end punch to high-end air.
Built-in high-quality Class A Line Amp, capable of independent operation without requiring a specific preamp.

Notes to Know

Requires a 500 series chassis and its power supply to operate.
Fixed Q design, not suitable for surgical EQ applications requiring precise frequency correction.
Analog knob control means settings cannot be precisely recalled like with digital plugins.

Heritage Audio 73 FAQ

Q：Does the Heritage Audio 73 EQ JR require a microphone preamp?

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A：No. It has a built-in Class A Line Amp that can directly process line-level signals. To process microphone signals, they must first pass through a separate microphone preamp to amplify the signal to line-level.

Q：What is the biggest difference between the 73 EQ JR and software EQ plugins?

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A：The main difference lies in the sonic coloration. The 73 EQ JR's transformers and Class A circuitry produce pleasing harmonic distortion, adding warmth and punch, which are analog characteristics difficult for digital plugins to fully replicate.

Q：I'm new to recording, is the 73 EQ JR suitable for me?

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A：If you don't already own a 500 series chassis, it's recommended to start with an audio interface or an integrated preamp. This EQ module is more suitable for advanced users who already have basic equipment and wish to upgrade their analog sound.

Q：Can the 73 EQ JR be used for mastering?

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A：Yes. Its Baxandall-style high and low-frequency curves are excellent for adding sheen and thickness to an entire mix. However, due to its strong sonic coloration, it should be used carefully to avoid over-coloring, making it suitable for mastering engineers seeking an analog flavor.

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Fast Shipping: In-stock items will be shipped within 24 business hours.
Professional Technical Support: Our certified audio engineers provide consultation for installation, licensing, compatibility, and setup.
Comprehensive Warranty & After-Sales Service: Includes both manufacturer warranty and THINK2 customer support.

※ Shipping times are calculated based on business days. Actual warranty follows the manufacturer’s policy. THINK2 provides integration and support assistance.

Warranty & Return Policy

With valid proof of purchase and product serial number, customers are entitled to manufacturer warranty and THINK2 after-sales service.
DOA / Non-human defects: Within 7 days of purchase, after verification, customers may request return or replacement.
Exclusions: Damages from misuse, unauthorized modification, consumable parts, natural disasters, or improper use beyond instructions.
Application Process: Contact customer service during business hours for return instructions.
Service Coverage: Taiwan region primarily; overseas based on logistics standards.

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