Be sure to add me to your favorites list Yamaha Mini Keyboard Replacement 3 inch 8 Ohm Speaker for some PSS and Other Portatone Model Yamaha Keyboards, Made in Japan! This is a very good condition speaker for a small sized Yamaha keyboard. It is a 3 inch in diameter speaker, made by Yamaha and used in some of the smaller sized Yamaha keyboards (with half-sized keys or smaller), usually called a "Portatone" with the model number starting with PSS, though there are a few others as well. It's 8 ohms and in great condition and working perfectly. You will have to splice or solder the wires to get them to work with your keyboard obviously. Please make sure your Yamaha keyboard takes the 3 inch diameter speaker with these specs and they should make a great replacement! The part # listed on the back of it is 804BF, and it was made in Japan! Please check out my Store!