Here in USA the 70's Popular Amps were;
Ampeg SVT W/ 810
Acoustic 360/361-370/371 with 18" folded horn reflex
There was some Peaveys [tube], Sunn's and Fenders mixed in.
I started with Peavey tube head and their 18" folded horn, then moved to SVT/810
Most[ not all] solid state amps back then were weak, a 100 watt tube amp had considerably more dynamics , balls and volume compared to most 350 watt solid state amps.