I use this for switching a three amp rig, 2 x MESA Boogie Roadkings 1 & 2 in stereo and using the 3rd button I can drop in an ENGL E670SE EL34, just for fun! The Lehle Dual SGoS performs flawlessly, no noise or hiss, no tone colouration, no ground loop hum or buzz, no pops when switching. If you need to switch between amps or other gear then this is without doubt the best piece of kit on the market. Not cheap but you pay for quality and that is exactly what you get. 100% recommendation.