These arguments are why people are starting not to post here. The real answer and logical answer to the question is that with this particular Yamaha receiver there are no preamp outputs in order to run the amp. The real solution hear would be if the OP wants a combination home theater and 2 channel music system utilizing his hafler amp then he would have to upgrade receivers to a model that does have preamp outputs for at least the front 2 channels and that would be the only logical way to do it. The tape loop output through a preamp can work but it would be a pain in the you know what to constantly change teh volume on the preamp to match the constantly changing volume on the receiver. One could do it but after a week or so I would bet he would want to through the whole idea out the window due to the constant volume matching needs of that set up. Unfortunately with the model of receiver that he has a outboard amp is just not a viable option. I would consider a receiver upgrade or if separates are really something you are looking into since there are plenty of better receivers out there that have the pre outs that can make this happen. Come on guys thats be helpful here and not just argue back and forth.