The EBS MultiDrive is a ”Class A” overdrive pedal, capable of producing sustain, overdrive and many other useful ”tube amp” distortion sounds. Spice up your sound! The mode switch selects classic, vintage or modern overdrive type sounds. This is the pedal to spice up your sustain! The 2008 edition uses true bypass techniques. Improvements with the new edition 3 dB higher headroom New analog circuitry with higher dynamics and lower noise. Mechanical True Bypass switching