My keyboard (Yamaha Clavinova CLP 550) had multiple issues, including no response/change when adjusting volume and no audio from the right channel, neither through the built-in speaker or the headphone jack.After some research and taking measurements, I decided to try replacing the main volume slider. These turned out to be almost perfect drop-in replacements. They soldered in beautifully, and most importantly: they 100% resolved my audio problems! My keyboard plays like new again!NOTE: While functionally these work perfectly, the little metal tab for the knob to seat on is much taller and skinnier than the OEM one. A little trimming down the metal with a Dremel tool and a drop of hot glue in the knob before seating worked out just fine for me.