I recently got this amp and really don't have any idea what it is. I have done a fair amount or research, and can find little on this head. I'm not really sure this is even a bass head, but from what I've read, I'm assuming it is. The serial number tag says: Model Peavey Power Pak Serial Number 7A-119630 I have already emailed Peavey, but was hoping this might be a little quicker. Its solid state, 200 watts, and can handle 2ohms. The original inspection writing is still on the inside. "11-10-77" is written inside, along with the initials "JJ".