i wonder, when you switch on the sansamp BDDI, what are you enganging? the pre amp? the EQ? a tec is fixing my SWR grand prix and im going to use them bass driver as a pre amp into the power amp next rehensal, but im not after the mid-scooped curve the sansamp provides when its on, so i wonder if i can use it OFF as a pre amp to match the necesary level for the power amp. thanks!