There are a lot of models of bass heads/preamps out there which have FX loops in them. The vast majority of them aren't foot switchable, don't have level controls, and are not series/parallel selectable. So my questions are: 1. Does anybody actually use their fx loop/s to achieve anything which can't be achieved by front ending fx loops between the bass guitar and the amp's input? 2. Have you ever used your fx loop/s at all? 3. If you have ever used your fx loop/s, do you actually use them at your gigs? I'm asking these questions because I have never used an fx loop on a bass amp which resulted in better usability of fx units, better tone, etc than if I front ended the fx into the input. I also can't say I know of any bass players other than myself who have either.