Hello, so I found a pair of Paradigm Active 20s off the curb and thought that they would be some nice speakers to add to my collection. Once I got home, and plugged them in, I was immediately greeted with static. Once I quickly pulled the plug and removed the amplifier, I was immediately greeted with a foul odor and found that rats were living in both speakers and left urine and feces during their stay. I spent some time cleaning the cabinets and amps, but I don't have a way to identify the zener diodes. I'm currently working on the power supply board in case anyone wants to know my progress. Here's a picture:
