I have an amp thats called a Firebird f100 Swinger 4-Bil. This was my Fathers before he passed, and i know nothing about it. I haven,t found out much about the amp searching on-line either. I know there are qite a few very knowledgeable people here, so i though i,d ask if anyone has any info on the thing. I,ve had it a long time, and would guess it has to be from the late 70,s. This is my first post. Bear with me!