Heritage Audio Grandchild 500 Series 670 Vari-MU Stereo Tube Limiter/Compressor

What is the Heritage Audio Grandchild 670
The Heritage Audio Grandchild 670 Vari-MU Stereo Tube Limiter/Compressor is a 2-channel, 500 Series module designed to bring iconic American dynamics processing to a compact and affordable format. Building on the legacy of its rackmount siblings, the Herchild 670 and 660, the Grandchild 670 delivers smooth, musical dynamics control for tracking, mixing, and mastering. With its vintage-inspired sound, powered by new-old-stock tubes and custom-wound transformers, the Grandchild 670 offers professional-grade compression with modern precision and dependability. Ideal for those seeking classic sound with contemporary functionality, this module brings unparalleled warmth, depth, and character to any program material.

Vintage Sound in a Modern Package
The Grandchild 670 stands out by recreating the sought-after sonic qualities of the classic Vari-MU dynamics control. Known for its creamy, natural-sounding compression, this module provides a soft-knee compression curve with fast attack and long release times. Whether you're processing vocals, instruments, or entire mixes, the Grandchild 670 adds warmth, depth, and a distinctive musical flavor to your sound. Its program-dependent behavior ensures that gain reduction starts gently, ramping up to brickwall limiting on louder signals. This dynamic response allows the Grandchild 670 to handle everything from subtle dynamic control to aggressive peak limiting with ease.

Precision Control with Flexible Time Constants
One of the defining features of the Grandchild 670 is its 5 selectable attack and release time constants. This level of control gives you the ability to fine-tune the dynamics to suit your material and workflow. The flexibility provided by these time constants, combined with the continuous variable slope, means that you can quickly dial in the perfect compression settings, whether you’re aiming for smooth leveling or hard-hitting limiting. This makes the Grandchild 670 ideal for a wide range of applications, from delicate vocal processing to aggressive compression on drums or full mixes.

Built to Last with Premium Components
Heritage Audio takes pride in its craftsmanship, and the Grandchild 670 is no exception. Powered by two NOS mil-spec 6BA6 tubes per channel, this compressor delivers the smooth, rich sound that only high-quality tubes can provide. Fortified with three custom-wound transformers, the Grandchild 670 offers robust performance and exceptional sound quality. The carefully selected components and intelligent design ensure that this unit is built for the long haul, providing reliable performance in both studio and live environments.

Convenient Front Panel Controls
Designed with convenience in mind, the Grandchild 670 offers immediate access to essential controls. The DC Threshold, which was once hidden inside the original model, is now front and center for quick adjustments, allowing you to dial in the perfect slope. The continuously variable slope control offers a seamless transition between compression and limiting, letting you adjust the behavior of the unit to fit your needs. Additionally, the unit features independent volume, tone, and sustain controls for precise sound shaping.