Compressor / Gate

The Herchild 670 2-Channel Optical Tube Compressor from Heritage Audio offers a faithful reproduction of the legendary Fairchild 670 compressor, prized by audio engineers for its warm sound and exceptional musicality. With its impressive specifications and robust design, the Herchild 670 is ready to meet the highest audio compression demands.

ARTICLE N° 93366
  • Herchild Audio Herchild 670
  • Optical tube compressor
  • Channels: 2
  • Gain: 30 dB
  • Input impedance: 2 kΩ
  • Output impedance: 600 Ω
  • Lamps: 16x 6BA6 (5749) + 2x ECC83 + 2x ECC81
  • 2x ECC99
  • Sidechain filter (off, 50, 100, 200, 350)
  • Direct access to the slope of the variable edge
  • Frequency response: 40 Hz ⭢ 15 kHz, +/- 1 dB
  • Output level: +4 or +8 VU
  • Clipping point +30 dBu
  • Own noise: < -82 dBu
  • Harmonic distortion: <1% up to an output level of +18 dBu (no limitation)
  • Connections:
  • Input: XLR
  • Output: XLR
  • Standard Rack 19" format: 3 U vertical
  • Dimensions: 482 x 265 x 200 mm
  • Weight: 13.3 kg
Originally designed for broadcasting and the making of lacquer masters for vinyl albums, the Fairchild 670 has become one of the most sought-after compressors of all time, with only a few original examples in circulation.
The Herchild 670 model faithfully reproduces the exact design and components of the original, with 22 tubes and 9 transformers to ensure high-quality professional sound.

Featuring 6 attack and release times, as well as an all-tube sidechain circuit, this compressor provides precise and transparent control over the sound.

In addition to reproducing the characteristics of the original, the Herchild 670 offers modern features such as a side chain filter with 4 selectable frequencies to reduce the influence of low frequencies on the signal.
Additionally, it offers 4 different operating modes to meet a variety of needs, including IND for independent channel control, LINK for synchronized stereo operation, LAT VERT for MID/SIDE processing, and LAT VERT LINK for MID processing /SIDE synchronized.

The Herchild 670 is an essential tool for professional recording studios, audio engineers and producers seeking studio-quality compression with the legendary character and musicality of the Fairchild 670.
Lamps
 Yes
Audio outputs
 2 x XLR
Vu-meter
 Yes
19" rack
 Kit 19" included, 6U
Power supply
 Mains powered
Adjustable Attack / Release
 No