Now that you just point out it, the 1st 2 tracks manage to absence lower bass, (apart from a bass drum strike just ahead of the fade from Custard Pie). But then “In My Time of Dying” seems to have some more bass… undecided what was happening listed here, https://cristianjyjvg.get-blogging.com/27195373/rumored-buzz-on-led-zeppelin-gold-records