The Sigma Vintage Drive offers the same high-quality build and reliability as the original Cornish pedals. It retains the mysterious allure of the brand, with its circuit design remaining obscured. The Sigma Vintage Drive is based on the Pete Cornish ST-2, which was originally designed for David Gilmour and later released as a standalone product.

While the ST-2 was suspected to be based on the Colorsound Overdriver, the tracing of the circuit confirms this. However, the ST-2 has some unique twists, such as being double-buffered like the G-2 and having different component values throughout the circuit. These changes result in a different overall voicing compared to the Overdriver. Additionally, an op-amp gain stage has been added to increase the available volume, making the ST-2 even louder than the original Overdriver.

The Sigma Vintage Drive faithfully reproduces the ST-2 circuit, but with the addition of an internal slide switch. This switch allows the pedal to be used in true-bypass mode instead of buffered bypass. While the buffered mode is generally considered better, this feature gives you the option to decide for yourself which mode you prefer.

Overall, the Sigma Vintage Drive offers guitarists the opportunity to experience the renowned Cornish sound at a more affordable price point. With its faithful reproduction of the ST-2 circuit and the added flexibility of the true-bypass mode, it is a versatile and high-quality overdrive pedal.

Summary created by AI from the original source.