JHS mods as follows:
- Installed a socketed JRC4558P chip as well as making vital changes in
caps, resistors and more for the most well balanced Tubescreamer tones
- You will notice twice the available gain and an even cleaner boost when needed;
- The strong mod responds just like a tube amp when you roll of the guitars volume, cleaning up beautifully;
- The low end is rich and focused and the other frequencies shine through any good amp.