Now you point out it, the very first 2 tracks manage to lack lower bass, (in addition to a bass drum hit just before the fade outside of Custard Pie). But then “In My Time of Dying” seems to have some extra bass… undecided what was happening listed here, https://cruzgaodp.xzblogs.com/68218999/not-known-factual-statements-about-led-zeppelin-gold-records