OK I'm going to pick up the studio channel pre but I already have an audio box VSL 22. If I'm not mistaken I basically XLR out the back of the studio channel into either of the mic/ instrument inputs of the VSL. I then turn the VSL's specific channel volume all the way down and manage the volume from the studio channel instead. I hope this means that I can keep the VSL's master volume where it's at because I have it calibrated to some room correction software.