Exactly. The bass guitar was conceived as an electric alternative to the double-bass, which is tuned EADG. Orchestral music often requires the double-bass to play notes below bottom E which is why many basses are fitted with a C-extension. This requirement became more common in the late Romantic...
It's not a valve amp. 60W, fine at low volume but when I was gigging we always had to mike it through the PA which never worked particularly well. I've had mine since 1985 and now I want to replace it with something newer and smaller!