Now that you point out it, the first 2 tracks manage to lack lower bass, (apart from a bass drum strike just ahead of the fade out of Custard Pie). But then “In My Time of Dying” appears to have some more bass… unsure what was happening in this https://josuerhvky.snack-blog.com/26673200/the-5-second-trick-for-led-zeppelin-gold-records