TEAC A-H01 - Knob Feel Review Teac have the ability to make a lovely Knob, this is a great example! They have this lovely machined signature Knob on their nicer devices. A single piece of what I think is Alumninium, giving it lovely weight. The rotation is fantastic, with zero axial skew. The downsides aren’t huge. With the knob not being perfectly centered into it’s hole. Also the tip of the Knobs is a little sharp. I love this Knob so much, I bought one just from the feel alone. Luckily it sounds pretty good too.