Old Fatman posted a thread about using speakers for model trains. I guess they're better for the bass range and that's mainly what we want for tanks. Haven't had a chance to try them out yet, but I'll get a roundtuit. Today I just got some high torque 360 motors to play with. If any of y'all know a thing or two about electronics I'd appreciate it if you would PM me to answer a question on capacitors. I don't want to highjack the thread, so I hope I hear from someone more knowledgeable than myself, which don't take much!