Fielect DC 6V 4N Push Pull Type Solenoid Electromagnet, Frame Type Solenoid Electromagnet Linear Motion, JF-0520B: Amazon.com: Tools & Home Improvement
Push-pull Auto-Cathode-Bias and Error-Correcting MOSFET Output Stages
Amazon.com: Lanzar 8-Channel Mosfet Amplifier - Class “AB” High-Current Dual Discrete Drive Stages, 2 Ohm Stereo Stable with High Pass and Low Pass Filter Controls, Amplifier for Car Speakers, Standard, (HTG889) :