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Amazon.com: Facmogu 2PCS 6.5in Full Range Speakers, RMS 30W MAX 50W, 4 Ohm HiFi Full Range Car Audio Speaker Drivers, Wideband Stereo Audio Loudspeaker Replacements - Red : Electronics
40MM Mini Audio Portable Speakers 4 Ohm 5W Full Range Magnetic Loudspeaker | eBay
Dropship 5 Core 6.5 Car Audio Speakers With Bullet 1000 W ; 4 Ohm Mid-Range Loudspeaker MR 6.5 BLT R 4oHM to Sell Online at a Lower Price | Doba
Stereo Enclosed Speaker Set - 3W 4 Ohm : ID 1669 : $7.50 : Adafruit Industries, Unique & fun DIY electronics and kits