Amazon.com: Lanzar 12in Car Subwoofer Speaker - Black Non-Pressed Paper Cone, Stamped Steel Basket, Dual 4 Ohm Impedance, 1600 Watt Power and Foam Edge Suspension for Vehicle Audio Stereo Sound System -
ProTechTrader Piezoelektrische Kopfhörer , hohe Impedanz für Transistor-Radios & DIY machen Elektronikprojekte 20.000 Ohm Empfindlichkeit (Beige-Draht ): Amazon.de: Elektronik & Foto
Visaton BG 17 8 Ohm – Thomann United States
What Is An 8 Ohm, 4 Ohm, 2 Ohm Or Other Impedance Speaker?
Amazon.com: impedance meter
Amazon.com: Pyle Car Subwoofer Audio Speaker - 8in Non-Pressed Paper Cone, Black Plastic Basket, Dual Voice Coil 4 Ohm Impedance, 800 Watt Power and Foam Surround for Vehicle Stereo Sound System -
Amazon.com: Pyle 4'' x 6'' Three Way Sound Speaker System - Pro Mid Range Triaxial Loud Audio 240 Watt per Pair w/ 4 Ohm Impedance and 3/4'' Piezo Tweeter for Car Component
Amazon.com: Car Vehicle Subwoofer Audio Speaker - 15inch Non-Pressed Paper Cone, Black Plastic Basket, Dual Voice Coil 4 Ohm Impedance, 2000 Watt Power, Foam Surround for Vehicle Stereo Sound System Pyle PLPW15D :