Using Headphones with Yamaha Clavinova CLP-122S

by Ashlee
(Ann Arbor, MI, USA)

I want to use headphones but the headphone jacks are larger than typical headphone plugs. I remember years ago we had some sort of adapter that we purchased that plugged into the jacks under the keyboard and allowed us to use regular headphones. The adapter is long gone and I'm having trouble finding anything like it. Anyone know where I can get a replacement? I've been searching all over online.