Hermida Audio ZenDrive Pedal

The Zendrive rose to fame because of its tube-like tone which came about from obsessive attention to detail from Hermida (who prior to designing pedals worked for NASA producing scientific instruments!) to get the perfect balance of saturation and harmonics required to result in all of the 'in-tangibles' that make a pedal overdrive sound like a real amp overdrive. Things like touch sensitivity and response to guitar tone and volume control changes.