I was just reading in my amp manual (gk bl 600) that the fx loop comes in after the EQ, does this mean if I were to plug my bass into an external pre-amp and then run the output strait into my fx return, Would I just be using the power amp section of the amp? Would this be a good idea?
+1 Also that's the "best" way to use amp-simulating preamps like the Sansamps or multifx with amp sims. Otherwise they tend to conflict with the tone shaping of the preamp built into your amp, leading to poor quality sound.