Vox V847 Wah: modifications Submitted by guitar-list on Mon, 2007-01-08 21:42 If you like tinkering with electronics this page on home-wrecker.com describes some modifications to the vox v87 wah wah pedal. By changing some of the components, you can tweak the range and limits of the wah effect. Read more about Vox V847 Wah: modificationsAdd new comment