Tsakalis Audio Works Crown OverdriveCrown British Style Overdrive (B. O. D.) The Crown British style overdrive was designed to mimic a variety of British School amps. From Plexi and AC to rich and fully detailed JCM overdrive tones. Ideal for boosting an amp to get that desirable crunch at lower volume, or adding a British character to any amplifier. The Crown features jfet technology combining three calibrated stages in cascade mode, which results in very smooth tone with a tube like