I would like to know the best way to run just the WWU pre amp section into my CA9. For this reason I would be able to run different configurations of cabs. Right now I am restricted to running a minimum 4ohm load which in most cases is plenty. I do know that when running just the preamp section of this fine amplifier that the MASTER or MASTERS must be off completely so there is no load on the power section. Now, do I simply run the signal from the line-out 1/4" jack to the input of the CA9 and select the Pre on the toggle swtich, or would I be better off running the signal out of the 'send' on the loop (which I'm currently using for my rack tuner). Also, the 'send to mix' knob aka the 'magic knob', does this affect the line-out or just the loop for it's intended purpose. I'm still learning what this little amp can do so sorry for what I should probably already know... As far as my JDI (DI) that I'm currently running from the line-out.. I can easily change that to the front of the signal and plug the bass right into it.