hello Jason,
I should have given more detail;
I want to use a standard line out so I can use my main speakers at the same time as having a line out to my aux wireless speakers control box.
(If I didn't want to use my main speakers at the same time I could turn "booster" off and use the Pre-out)
I am using the Pre-out but I have to turn up the volume too much to get a satisfactory level for the aux speakers.
A standard source line out gives the required level...for instance if I hook up my FM tuner directly to the wirelss speakers it works great!
Thanks,
Josh