The best thing to do is to try. You wont hurt anything. Be sure to have volume down when swapping use of amplifiers. There are always gain issues. With some preamp/amp combinations there can be too much gain with the result the volume control has too little range of practical use, music getting too loud at low volume settings.
Does the manual for the Exposure list the gain of the preamp section? What is gain of the Accuphase?