Amazon.com: Visaton Full-Range Speaker 8 cm (3.3'') 8 Ohm 15W 100-V System : Electronics
CQRobot Speaker 3 Watt 8 Ohm for Arduino, JST-PH2.0 Interface. It is Ideal for a Variety of Small Electronic Projects. : Amazon.com.be: Everything Else
Amazon.com: Visaton R10S 4" Full Range Speaker 8 Ohm : Electronics