Hello everyone. I need some help. I just installed a set of THD Yellow Jacket (YJS) into my Hot Rod Deluxe. I bought them used off of a member on here. Everything was working fine before that. After I installed them, I turned it on, and it made a loud buzz. Immediately after that, I saw something bright, I'm not sure what area it was in, i just panicked, turned it off, and unplugged it from the wall. I think it was near the phase inverter tube area. After that, it smelled like burning plastic, and I saw smoke. I'm very afraid to turn on my amp again, and I'm afraid I damaged something. Why do you think this happened?