Mad Professor SUPER BLACK Guitar Effects PedalFender Blackface amps (1963 1968) are widely considered as the most recorded amps in the history of music. And for a good reason. Mad Professor Super Black has the Fender Blackface tone in the box! The whole amp signal path is replicated inside. You can turn your amplifier easily into 60 s Fender glory! Dont be afraid to plug the Super Black pedal also straight into the return jack of your amp s FX loop. This way you can bypass the preamp of your amp