Good mathematical estimate. In the '80's most audio equipment had not been capable of reproducing material which would feature bass as the main element up unti

Good mathematical estimate. In the '80's most audio equipment had not been capable of reproducing material which would feature bass as the main element up until that time. So apparently very few had developed the taste that would have driven them to produce recordings where the singing and melody were less prominent for that reason. But you can turn up many old recordings on a modern subwoofer-enhanced system and rattle the walls quite effectively, the rest of the instruments will be as equally strident as the bass though, like the producer intended and more like the live concert than the old audio gear would do.