TEAC LP-R550USB - Knob Feel Review Happy Palm Sunday! Or not, if you’ve bought a Teac LP-R550USB. Initial first impressions, good! Nice weight. However, too small, and the rubber… oh dear. Usually I’d always recommend rubber on your knobs, But if it comes off, It’s just going to lead to problems down the line, I’m sure. Axial skew also leaves little to be desired.