Onkyo A-9030 - Knob Feel Review Onkyo! This is a great Knob! The input selector has been downsized it seems to accomodate the enormity of the mammoth volume Knob. I have no problem with this. The Bass, treble and balance are all average. The input selector has a nice little clicky rotation. The star of the show is clearly the volume Knob here, with minimal axial skew, a big thanks goes out to Onkyo for making it so!