Hello, I am new to this site as well as to electrical theory. I recently took a second semester physics course and stumbled upon a great deal of curiosity in the electricity and magnetism portion of the class. I am taking a few courses pertaining to electricity&magnetism as well as engineering this coming semester, so I will try to apply what I learn to better understand the scenario, if even possible. With that being said, I just sold my car subwoofers but still have my amplifier. First off, I was wondering if it somehow could be used for purposes other than sound amplification and then I started to think about a transformer. My main question is this: Can a car amplifier be somehow used for other practical applications?