I have read problems about this reciever and cutting out. Is it stricly due to the fact that its because the speakers being used are 4ohm and not 8ohm? Or is this a problem no matter what ohm the speaker is rated. I ask this because I plan on purchasing the 45tx but also want to main towers that are rated at 4ohm. Another question, if I have 8ohm speakers all around except the 2 main that are 4ohm. Will that affect the reciever negativly also or will it not matter since there seperate channels?