Frank...yes going into a mixer then into one of the L1 channels would solve the "missing EQ" situation. BUT...as you know, mixers like all audio equipment have widely varying degrees of sound quality.

The way to maximize channels would be to go out of the mixer in to one of the 2 L1 channels that does NOT have EQ (channels 3&4) which would leave you channels 1&2 that do have EQ. For those two channels, you would use the L1's remote 2 channel mixer...which I have velcroed next to my Mackie mixer.

BUT, in order to get the most out of the L1, the mixer would have to be "pro quality." Lesser quality mixers just don't have high quality sound output and the L1 can't do anything but process the information it receives.

You can also consider the Bose ToneMatch mixer add-on. (close to $500). It is 4 channels with TONS of instrument and mic EQ presets as well as a pretty wide array of studio-class effects.

But to return to your specific issue....if the bass is too loud on a BIAB file, I don't see how you can reduce the volume of the bass without reducing the volume of the entire song file.

Seems to me you would need to go back into BIAB and use its internal mixer to reduce the volume of the bass and then re-save the file....play it through the L1 and keep tweaking until you get it the way you want.

But I'm reasonably sure that the bass through the L1 sounds louder because it his higher fidelity and it is just processing more "information" than on a lower fidelity PA rig.

Best,
Jim