Heritage Audio HERCHILD Next Gen Model 670N – Stereo Vari-Mu Tube Compressor

OVERVIEW

The HERCHILD Next Gen Model 670N represents a bold new chapter in Heritage Audio’s pursuit of recreating the legendary Fairchild sound. Drawing on years of research and the enormous success of the HERCHILD 660/670 and GRANDCHILD 670/500, the 670N delivers the same unmistakable analog warmth, musicality, and tube-driven authority – but with expanded features tailored for today’s mixing and mastering environments. Powered by four NOS 6BA6 tubes and six newly designed custom transformers, the 670N brings authentic Vari-Mu character to vocals, drums, mixes, and masters with smooth compression, rich saturation, and commanding presence.

Where the original Fairchild design was revolutionary, the 670N pushes these sonic foundations forward with modern enhancements. Enjoy independent channel bypass, advanced side-chain filtering, dual mono/stereo operation, LAT/VERT (mid/side) capability, and progressive DC Threshold control for fine-tuning ratio and knee response. The redesigned output gain make-up stage – built around the acclaimed HA-880 transformer-coupled op-amp – provides clean, precise level control without colouring the tone. Stunning, powerful, and built to last, the HERCHILD 670N puts the king of tube compression within reach for engineers who demand top-tier sound without the flagship price tag.

KEY HIGHLIGHTS

Vintage Soul, Modern Functionality:

The 670N faithfully delivers the warmth, depth, and harmonic richness of the original Fairchild while adding workflow-boosting features like advanced side-chain filtering, independent bypass, and flexible attack/release times adapted for modern production demands.

True Vari-Mu Tone at an Accessible Price:

Powered by four NOS 6BA6 tubes and six custom transformers, the 670N captures the legendary Vari-Mu feel – smooth glue, weighty low end, and velvety highs – now available at a fraction of the cost of heritage units.

Unmatched Versatility for Mixing & Mastering:

From transparent compression to bold tube saturation, the 670N excels on vocals, drums, buses, and full mixes. Dual mono, stereo, and LAT/VERT (mid/side) modes open the door to advanced processing techniques.

Designed to Deliver, Built to Last:

With stepped controls, rugged construction, a refined output stage, and flawless attention to detail, the 670N offers years of reliable performance and timeless studio appeal – hand-built in Madrid, Spain.

FEATURES

• True Fairchild-style Vari-Mu compression
• 4 x NOS military-grade 6BA6 tubes
• 6 x custom-made transformers
• Adapted Attack & Release times for modern workflow
• Advanced side-chain filtering
• LAT/VERT mode for mid/side processing
• Dual mono/stereo functionality
• Progressive DC Threshold (variable slope control)
• Independent bypass for each channel
• Output gain make-up stage with HA-880 transformer-coupled op-amp
• Hands-on stepped controls for every parameter
• Clean, intelligent, long-life design
• Attractive 5U rack unit with premium build quality
• Hand-built in Madrid, Spain

TECHNICAL SPECS

Format: 5U rack unit

Compression Type: Vari-Mu (Tube-Based)

Tubes: 4 × NOS 6BA6

Transformers: 6 custom Heritage Audio transformers

Modes: Dual Mono, Stereo, LAT/VERT (Mid/Side)

Controls: Stepped parameters, variable slope, independent bypass

Sidechain: Advanced filtering options

Output Stage: Transformer-coupled HA-880 opamp make-up gain

Country of Origin: Hand-built in Madrid, Spain