Fitted the Gryphon Atlas spike feet today to the Pantheon. The biggest difference is in the tightening of the bass and imaging leading to even more resolution. The bass bloat and boom I had previously with big bass tracks is much reduced and I haven't even moved the Pantheons further out. For some reason the more focused soundstage gives the impression of more loudness with a given volume as compared with the stock POM footers. My wife was an Atlas sceptic so she was very surprised with the improvement in sound. Given the rather substantial sound improvements it's a shame the Atlas is not included with the Pantheon as standard.