How to integrate 2 preamps w/1 amp+spks?

Here's my situation: I currently have an Acurus Act3 preamp but it doesnt have an analog pass thru. I'm eager to listen to the Bel Canto DAC1 using a Creek OBH-12 preamp. I really dont feel like spending $$$ for an all in one box that will do what the Acurus preamp does plus have an analog pass thru. I have one stereo amp (Acurus A200) and one set of LR main speakers (NHT 2.5i). Is there any way to rig it up so that I dont have to manually switch the rcas between my preamps and amp? Thanks for any help in advance! :) Ricky Hunter [email protected]