Mad Professor Amps Dual Blue Delay
Finnish pedal guru Harri Koski of Mad Professor Amps came to Nashville with the deceptively simple Dual Blue Delay, which features both a vintage, Binson Echorec-ish-voiced short digital delay and a pristine-voiced longer delay. Cool hidden functions include the ability to use the voicings together or independently, the option to select buffered or true-bypass switching, and the very unique capability of being able to change the phase of repeats in order to mimic the unusual variances found in some vintage echo units.


























































![Devon Eisenbarger [Katy Perry] Rig Rundown](https://www.premierguitar.com/media-library/youtube.jpg?id=61774583&width=1245&height=700&quality=70&coordinates=0%2C0%2C0%2C0)













Zach loves his Sovtek Mig 60 head, which he plays through a cab he built himself at a pipe-organ shop in Denver. Every glue joint is lined with thin leather for maximum air tightness, and it’s stocked with Celestion G12M Greenback speakers.


































