Now that you simply mention it, the first two tracks seem to deficiency very low bass, (other than a bass drum hit just prior to the fade away from Custard Pie). But then “In My Time of Dying” seems to have some additional bass… unsure what was happening below, https://kameronrjxla.tokka-blog.com/26937573/the-fact-about-led-zeppelin-gold-records-that-no-one-is-suggesting