Now which you mention it, the main two tracks appear to deficiency very low bass, (other than a bass drum strike just before the fade from Custard Pie). But then “In My Time of Dying” appears to have some a lot more bass… not sure what was happening here, https://led-zeppelin-gold-record61356.bloginwi.com/60407993/the-definitive-guide-to-led-zeppelin-gold-records