Austin has totally nailed these presets for the bass. He has successfully managed to turn a AX8 into a very hi-end bass amplifier (whether played with fingers or a pick). These presets sound incredible through my Atomic CLR II (whether cranked up loud or at a low level or subsonic or trebly). Austin and the bass player Scott Nelson, who worked with him, undoubtedly have put in considerable time and effort programming these presets to get them right. I am very grateful to them for their collaboration delivering a A+++ bass product. I highly recommend these presets for bass with the AX8 - regardless of what bass you have. I have tried the presets with a Fender Precision USA performer series and a Rickenbacker 4001. Both sounded amazing. It is a very versatile pack for all genres - heavy metal, rock, jazz, reggae, country, alternative, etc.