Heritage Audio Herchild 670 Review! (2023)

Heritage Audio Herchild 670 Stereo Tube Compressor

Heritage Audio Herchild 670 Review

Rating: 4.5 out of 5.
  • Sidechain filters: Off, 50, 100, 200, 350
  • MID/SIDE processing through LAT/VERT mode
  • Frequency response: 40 Hz to 15 kHz, +/- 1 dB

Heritage Audio Herchild 670 Review

For years the trade has referred to this tube-based beast as something particular, distinctive, and even magic-like. The unique Fairchild has certainly been an important part of the sound to so many hits throughout a number of decades. It actually has earned its title as the father of all compressors.

Being primarily based around 22 valves and 9 transformers you could be certain the Herchild Model 670 will imprint its signature sound throughout your tracks offering that acquainted tone that we’ve all come to like.

Though it was initially designed for use for cutting lacquer masters for vinyl albums it didn’t take long for engineers to comprehend that it may do far more. It quickly turned into an important studio tool for a lot of modern artists, engineers, and producers and could possibly be present in most professional studios.

Heritage Audio Logo

Whereas staying true to the original when it comes to response and sound, it’s been ready to add a number of things to make it extra sensible in modern-day studios. First off Heritage Audio gave direct access to the constantly variable slope management.

That is one thing that makes the compressor a lot more versatile and was only accessible on the original through an inconvenient screw adjustment hidden from fast access. Then there’s the SC Filter. These days, it’s nearly unattainable to fathom a compressor without this function because it’s developed into so important on a regular basis use.

Heritage Audio has rigorously reproduced the circuitry of the originals from the 670 and has no less than 22 valves and 9 transformers in its signal path. The entire original controls could be discovered on the front panel of each, with the six Time Constant settings faithfully reproducing the precise attack and release times as the originals.

Here Heritage Audio offered 4 completely different frequencies to select from to exactly tailor your compression needs. Heritage Audio additionally faithfully reproduced the precise attack and release times within the Time Constant part so you possibly can confidently recreate the texture of its ancestor.

The Herchild Model 670 is a two-channel unit so you have the choice to use them independently or linked together. There are literally 4 modes of operation: Individual, Link(Stereo), LAT/VERT(MID/SIDE), and LAT/VERT Link. Utilizing the LAT/VERT mode gives a completely new world of choices to your mix.

Heritage Audio Herchild 670 Rear Panel

Heritage Audio says that the Herchild stays true to the unique design when it comes to response and sound. The producer additionally states that all six attribute Attack/Release settings had been faithfully reproduced.

However, they have added a few alternatives to make the compressor even extra versatile. Moreover, a sidechain high pass filter with 4 switchable frequencies (50, 100, 200, and 350 Hz), presents a direct front panel entry to the DC Threshold, which impacts the ratio, knee, and curve. This was only accessible through an inconveniently situated screw on the original.

Furthermore, the producer states a frequency response of 40 Hz to 15 kHz, an input impedance of 2k ohms, an output impedance of 600 ohms, and an output clipping level of +30 dBu. The Herchild 670 is provided with line-level XLR input and output connectors.

The unit options front panel VU meters, which could be configured to show both gain discount or valve balance through a selector switch. The rear panel of each is essentially populated by protruding valves and transformers, with audio I/O offered on XLR connectors, while an IEC power inlet feeds inside the power supply.

So lastly, after so many years of this being unobtainable to mere mortals, the Herchild Mannequin 670 is right here and inside reach of everybody. Benefit from the sound that has blessed hundreds and hundreds of hits all through the years. Feel the heat as it hugs your tracks and makes them stand out proudly from all the rest.

Heritage Audio Herchild 670 Features:

  • Fully tube-based Variable-Mu compression
  • 22 valves & 9 transformers
  • Side chain filter for modern day needs
  • Immediate access to the continuously variable slope/ratio/knee
  • All 6 of the original Attack & Release settings available
  • Clean, intelligent design to guarantee many years of easy professional use
  • That legendary sound finally available to everyone

Why You Need the Heritage Audio Herchild 670

If you are a fan of some vintage-sounding compressors and sound eloquent for that era, then Herchild 670 is your pick. Also, if you are a hardware person and you prefer fingers-on processing instead of plugin variables, this has you covered.

Even though is promoted to be an affordable pick compared to the original, the Herchild 670 is still pretty expensive, pricing at around $10.000. Yes, when in comparison with the original, it is a huge difference in the price if you are at the point of getting a compressor that is in this quality range.

9.5Expert Score
Heritage Audio Herchild 670 Review

Heritage Audio has rigorously reproduced the circuitry of the originals from the 670 and has no less than 22 valves and 9 transformers in its signal path.

  • Very Close to the Original
  • Features and Controls same as on the Fairchild
  • Great Vintage Sound
  • Sidechain Filter
  • Pretty Expensive


We summarized all the features that this amazing unit provides and we hope that it is enough for you to understand what exactly this device can provide for your sound. Heritage Audio gave its best to create and emulate the original sound for an amazingly lower price.

If you are having any questions in regards to this tool, please let us know in the comment section below or reach out to the respected developer and their customer care for any additional details.


Nikoloski is the founder and main content writer and editor of Mixing Tips. With his experience in audio engineering, mixing, and mastering for over 15 years, will provide hands-on experience and expertise in all the matters covered on this website.

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