Speaker Speakers Compatible with PHONOCAR Basic 66121 Double Cone 10 cm 100 mm 4 inches in Diameter 20 watts rms and 40 max 4 ohm 90 db, per Pair : Amazon.com.au: Electronics
8 Inch 4 Ohms 90 dB Car Speaker Plug and Play Speaker System Carbon Fiber 30mm Voice Coil - China Car Audio, Car Speaker | Made-in-China.com
Woofer 4 Ohm, 12" High Output 90 dB 250 Watts AR Acoustic Research replacement | eBay
10W Mini 3" HiFi Full Range Speaker 8 Ohm Anti-Magnetic Audio 2.0/2.1 Home Stereo Woofer Loudspeaker 90dB High Sensitivity for DIY Boom Box Satellites Speaker : Amazon.ca: Electronics