I bought a Thump15a and plan to use a focusrite scarlett solo with it. My brother plays bass and has a bass amp, and so I was wondering if I could take the output of the thump15a and plug into the input of the bass amp, while setting the mode of the thump15a to sub (this takes out the low end from the loudspeaker and lets the bass amp handle it instead). The only danger I see is that the output is line level whereas the input to the amp is instrument level. What do you guys think?
I am not using a stereo setup (as I only have one loudspeaker), so I could also hook up the scarlett solo directly to the bass amp (but again I believe the output on the scarlett solo is line level). What is the difference between these two setups?