Now that you just mention it, the primary 2 tracks seem to deficiency low bass, (other than a bass drum hit just ahead of the fade away from Custard Pie). But then “In My Time of Dying” seems to have some extra bass… unsure what was happening right here, https://goldrecordoutlet.com/shop/led-zeppelin-houses-of-the-holy-custom-etched-reproduction-signed-lp-display/