Amazon.com: ASHATA Full Range Speaker,3-Inch Mini Full Frequency Audio Speaker Loudspeaker 4ohm 5W,High Sensitivity Loudspeaker for Multimedia Sound Box : Electronics
Audiopipe 6in x 8in 3 Way 400 Watt Speaker — M&M Merchandisers
Speaker - 3 Diameter - 8 Ohm 1 Watt : ID 1313 : $1.95 : Adafruit Industries, Unique & fun DIY electronics and kits
3-Inch Speaker 4 Ohm 3 Watt - RobotShop
Speaker - 3 Diameter - 4 Ohm 3 Watt : ID 1314 : $1.95 : Adafruit Industries, Unique & fun DIY electronics and kits