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: DS18 PRO-X8.4BM Loudspeaker 8" Midrange Red Aluminum Bullet 550W Max 275W RMS 4 Ohms + Car Door Foam Speaker Rings Blocker Soundproof Sponge - Great for Car Speaker Insulation - 2
Amazon.com: Eminence Patriot 820H 8" Guitar Speaker with Hemp Cone, 20 Watts at 4 Ohms : Musical Instruments
Amazon.com: Visaton Full-Range Speaker 8 cm (3.3'') 8 Ohm 15W 100-V System : Electronics
Visaton FRS7-4 2.5" Full-Range Speaker 4 Ohm
Amazon.com: Visaton Full-Range Speaker 10 cm (4'') 8 Ohm 30W 100-V System : Electronics
Amazon.com: uxcell a15102900ux0379 1W 8 Ohm Magnet Mini Loudspeaker MP3 MP4 Player Speaker 28mm Dia Pack of 4 : Electronics
Myth busted, real test 4 Ohm vs 8 Ohm speaker? Car audio system PRV AUDIO 6MR500-NDY - YouTube
GRS 4FR-8 Full-Range 4-1/2" Speaker Pioneer Type A11EC80-02F 8 Ohm