Amazon.com: CQRobot Speaker 5 Watt 8 Ohm Compatible with Arduino Motherboard, JST-PH2.0 Interface. It is Ideal for a Variety of Small Electronic Projects. : Everything Else
Supersonic 7.1-in 5-Watt Smart Bluetooth Compatibility Indoor/Outdoor Portable Speaker in the Speakers department at Lowes.com
Amazon.com: Full Range Speaker, 5W 4Ω Car Speakers, high Sensitivity Audio Speaker, Suitable for Multimedia Sound Box : Electronics
8KK69 PAIR OF SPEAKERS FROM PROJECTION TV: APV1021-A, 8 OHM 5 WATT, 6-1/2" X 3" | eBay
21UU77 PAIR OF KOSS SPEAKERS, FROM BOOMBOX, 4 OHM 5 WATT, 4-5/8" DIAMETER, VGC | eBay