The Boomer 2 was some sort of model designation weirdness. No difference we can tell between a Boomer 2 and a BG-2 Boomerang 2. The Boomer 2 pedals were made at the same time, we see them as early as 70 or so.
- (2011-05-18) comparing 2 boomerang wahs. 67 BG1 vs 74 BG2 simple test by Joe Gagan
- (2013-04-04) 3 boomerang wah pedals by Joe Gagan
- (2015-09-29) Thanks Joe Gagan! He saved the day on this Boomerang wah. I got it with an unfixable potentiometer in it. He is one of the leading authorities on wahs so I asked what he knew about the boomerang wahs. He was a wealth of info and a super nice guy! He eve by Kinnatone
- (2015-12-23) maestro boomerang BG2 wah pot setup and stop adjust. BG2 , Bg-1 by Joe Gagan