Amazon.com: Pyle 6.5 Inch Mid Bass Woofer Sound Speaker System - Pro Loud Range Audio 300 Watt Peak Power w/ 4 Ohm Impedance and 60-20KHz Frequency Response for Car Component Stereo PLG64,Yellow : Electronics
Insignia 5" inch 8 OHM 20 Watt Woofer Sub Speaker | eBay
Massive Audio MX Series 2-Inch 20-Watt-RMS 2-Way Coaxial Speakers in the Mobile Audio department at Lowes.com
Speaker - 3 Diameter - 8 Ohm 1 Watt : ID 1313 : $1.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Amazon.com: Pyle Car Two Way Speaker System - Pro 3.5 Inch 120 Watt 4 Ohm Mid Tweeter Component Audio Sound Speakers For Car Stereo w/ 20 Oz Magnet Structure, 1.65” Mount Depth
Amazon.com: Pyle 5.25” Car Sound Speaker (Pair) - Upgraded Blue Poly Injection Cone 3-Way 200 Watt Peak w/Non-fatiguing Butyl Rubber Surround 100-20Khz Frequency Response 4 Ohm & 1" ASV Voice Coil -
20W 4 Ohm Full Range Speaker [XS-GTF1027] : ID 1732 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Amazon.com: Eminence American Standard Alpha-2-8 (4-Pack) 2" Pro Audio Speakers, 20 Watts at 8 Ohms : Musical Instruments
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
Aiyima High Sensitivity Audio Speakers | 4 Inch 8 Ohms Full Range Speaker - 2pcs 2.5 - Aliexpress