There was no major change in the speaker itself for a long while - a top of the line speaker from the 80 is probably still good... if the material aged well. Th

There was no major change in the speaker itself for a long while - a top of the line speaker from the 80 is probably still good... if the material aged well. The elasticity of the membrane probably suffered more than anything else for example. That’s why modern speaker still cost a lot.