Re: Can I bypass the preamp on bassman?
That's what it does. If you plug a preamp or modeling unit straight into the effect return, you bypass the amp's own preamp section. It is a really cool way to set your stuff up if you want to focus on the external processor's capabilities. Also, if the processor/modeler has an "amp/line" switch, go with "line"-level, or try both and see which sounds better.