The StamChild SA-670 is our take on the most iconic and finest sounding tube compressor in history, the Fairchild 670.
While developing this project we had two main objectives, first and foremost the audio path had to remain as close as possible to the original units and it had to be affordable. With this in mind we developed a few prototypes and carefully tested each component and it’s interaction with the circuit, after many months of research and test we determined there was a way and so the StamChild SA-670 was born.
With the aid of premium transformer reproductions made by Brian Sowter in the UK and the use of four JJ 6386 and two 12AX7 tubes we have managed to make this unit virtually indistinguishable to the original. The SA-670 also uses premium Vishay capacitors, Ohmite carbon resistors, a German made chassis and faceplate as well as the historically correct VU meter, Knobs and Neutrik XLR connectors.
In order to reduce the cost of manufacturing these units we have made some modern implementations which do not affect the audio path. We have changed the tube based power supply to a solid state one which has no bearing in the sound as well as changing the control amp to a hybrid setup maintaining the tube saturation.
With this measure we were able to greatly reduce the cost of production while preserving the original tone without touching the audio path and without removing the saturation produced by the tube on the control amp.
We are Stam Audio’s only distributor
- • Sowter input and output transformer
- • True to the original Fairchild audio path schematic
- • JJ 6386 and 12AX7 tubes
- • Vishay Capacitors
- • Ohmite carbon resistors
- • Completely discrete signal path
- • Simpson VU meter
- • Original release and attack times
- • Less than 0.5% THD
- • XLR inputs
- • XLR and TRS outputs
- • Voltage switch selector (115V or 230V)
- • Hand made in Chile
- • 4U, 200mm deepth
- • 2-year warranty