I recently picked up the Whammy 4... always wanted to try one and they released the 20th Anniversary edition, so I had to bite (stupid G.A.S.

).
Anyway, I was pretty worried about the bypass as well. I tested it through headphones, my small rig (Hartke Kickback 12) and my larger rig (Shuttle 6.0 into Avatar B210 & B212 neos). I'm pretty anal about noise through my rig and my tone, I'm fine with the bypass on the Whammy IV. I've thought about getting a
Micro Loooper, but the bypass hasn't bothered me enough.
5sg.