The first amp of my own was a Kay (1965) with one 10" speaker. I forget how many watts it was, but it was a tube amp. My Dad got it for me along with my Kay electric guitar. Not bad, actually.
But, my first "real" amp was a Silvertone Twin Twelve tube amp with something like 40w, I think. I still have it, heh, heh, and it still picks up the radio and anything else on the airwaves. Other than that, it's a great ole amp. dad bought it, too, but I (me, myself) had just bought a Gretsch Tennessean to go with it.
Oh, ya mean my first bass amp? Well, that was a Peavey Mark IV (or was it III? can't remember the title). Anyway, big head with two 115 cabs. That was wayyyy more sound than needed for the gigs I was playing at the time (1988). But, it did me good for many years until I got my Trace Elliot and SWR, and now markbass stuff. Actually, my second amp was a Peavey Combo 300, which I still have. Then, a Fender Bassman 60 (sold it), Bassman 150 and Bassman 25 for practice at home. I still have five bass amps. All I need is the Markbass, though.