EDGELEC 100pcs 1 ohm Resistor 1/4w (0.25 Watt) ±1% Tolerance Metal Film Fixed Resistor, Multiple Values of Resistance Optional: Amazon.com: Industrial & Scientific
Amazon.com: Pyle Car Mid Bass Speaker System - Pro 5 Inch 200 Watt 4 Ohm Auto Mid-Bass Component Poly Woofer Audio Sound Speakers For Car Stereo w/ 30 Oz Magnet Structure, 2.2”
Volt/Amp/Watt/Ohm - Calculator:Amazon.com:Appstore for Android