In this video we compare the new Fat Glass II Tube Overdrive pedal with the TS9 Tube Screamer, TS 808 Tube Screamer, Boss Blues Driver, and Fulltone OCD.
Absolutely, nothing on the market I've ever heard can "warm" a sound, transition to "edge of breakup" and then head in to rock and even metal like this pedal. You can also swap the tube to change the tone.
