BOSS GT-6 - Knob Feel Review Here is a little slice of Knob Gold! It’s true what people have been telling me, the equipment that is made for musical production is a lot better quality than the reproduction equipment. The Knobs on the BOSS GT-6 are beautifully smooth to turn. Zero Axial Skew too. The little Selector Knobs are still smooth but also precise. The spinner is just a little guilty pleasure now. This seems like a genre I might spend a bit of time in until some new HI-FI comes around!