Original part number :X7842A0 ( Now YA372C00 ). Price is per speaker.
Replacement speaker for Yamaha YFP70 digital piano XH108A00
Replacement speaker for Yamaha PSR4500 XG335B00
Replacement speaker for a Yamaha PSR125 or Yamaha EZAG Electronic Guitar X2519A0
Replacement speaker for a Yamaha PSR-330 keyboard XN789B00
XL285A00 Replacement speaker for a Yamaha PSR185 , PSR160 or PSR74
Replacement speaker for a Yamaha PSR-E363 keyboard YJ207B00
