Heritage Audio Herchild HA670 Stereo Tube Compressor

Heritage Audio Herchild HA670 Stereo Tube Compressor Overview
The Heritage Audio Herchild HA670 Stereo Tube Compressor is an exceptional piece of audio gear that brings the smooth, creamy sound of the legendary Fairchild 670 into the modern studio. A sought-after compressor for decades, the Fairchild 670 has been the go-to choice for engineers, mastering specialists, and producers who want to add punch and natural compression to their tracks. Now, the Herchild HA670 gives you the iconic tube compression sound with modern precision and a fraction of the size and cost of the original, making it an accessible yet powerful tool for both professional and home studios.

Classic Tube Compression with Modern Precision
At the heart of the Herchild HA670 lies classic tube-based compression, renowned for its smooth, natural-sounding dynamics control. With 22 tubes and 9 transformers, this stereo unit produces a warm, punchy sound that has shaped countless tracks over the years. The Herchild HA670 delivers a variable-mu compression curve, providing gentle, program-dependent control that starts at a low ratio for smaller peaks and gradually increases to a harder compression on louder signals. This results in a natural, musical compression that adapts to the dynamic needs of your source material, just like the original Fairchild 670.

Class A Circuitry with Premium Transformers
Designed with the same high standards as the original Fairchild 670, the Herchild HA670 utilizes Class A circuitry and premium components, including AMI input transformers and CineMag output transformers. This design ensures that you get the full-bodied warmth and depth that makes the Fairchild sound so desirable. The handwired, transformer-coupled setup offers exceptional headroom and clean, problem-free audio, making it an ideal choice for both tracking and mixing. Whether you're working with vocals, drums, or full mixes, the Herchild HA670 adds a layer of richness and clarity to your sound.

Advanced Features for Professional Workflows
The Herchild HA670 isn't just about classic sound—it also offers modern features that make it versatile and easy to integrate into your current setup. One of the standout features is the front-panel access to the continuously variable slope (DC Threshold) control, which allows you to adjust the compression characteristics from smooth, subtle control to a harder, more pronounced knee. The compressor also includes a sidechain filter, which helps minimize the influence of low frequencies on the compression action, giving you greater control over your mixes. This sidechain filter is especially valuable when working with bass-heavy tracks, ensuring that the compressor only responds to the frequencies that need dynamic control.

LAT VERT and LAT VERT LINK Modes for Mid-Side Processing
For those who prefer mid-side (M-S) processing, the Herchild HA670 offers two modes—LAT VERT and LAT VERT LINK. These modes are inspired by the original Fairchild 670’s functionality, allowing for precise control over stereo mixes and giving you the ability to enhance the width, depth, and focus of your tracks. LAT VERT provides independent mid-side processing, while LAT VERT LINK links the two channels together for a unified effect across your stereo mix. This flexibility makes the Herchild HA670 ideal for mastering and mixing, giving you the ability to control the stereo field with ease.

Durable, Handcrafted Build for Long-Term Use
Crafted with meticulous attention to detail, the Herchild HA670 is built to last with a robust and intelligent design. Its construction mirrors that of the original Fairchild 670, ensuring that you get the same vintage-quality performance with the reliability and durability needed for today’s studio environment. Whether you're working on a single track or handling a full mix, this stereo tube compressor is built to serve you faithfully for many years, delivering high-quality results in every session.