Orland Park



A Tube Works B.K. BUTLER MOSVALVE MV-962 in Non Functioning condition!

At Evolution Music, we attempt to highlight cosmetic defects (if any) by picturing every angle of every piece of gear so you know exactly what you are getting.  We always picture any and all accessories too.  What you see is what you will get so please check out the pictures!  Everything we sell has been tested and is fully functional unless otherwise noted. We have a 5 star rating from 1000+ happy customers across our three locations.  Please message us if you have any questions.  We are always happy to help and will respond asap!


  • This unit is not powering on. We acquired it from another store whose owner retired. It was for sale in their store. One would assume that it worked if they had it for sale. Maybe it's a simple fuse issue. We do not know the backstory and don't have the time or resources to investigate further.