There are different kinds of pre outs:
One you use with jumper to the poweramp input(of the integrated amp) disconnects the poweramp section.
and another kind that will not disconnect the poweramp section and could be used together with different matching poweramp to biamp your speakers(again if such have two sets of binding posts each).
One you use with jumper to the poweramp input(of the integrated amp) disconnects the poweramp section.
and another kind that will not disconnect the poweramp section and could be used together with different matching poweramp to biamp your speakers(again if such have two sets of binding posts each).