Changing speaker impedance is not explained in the quick guide that comes with the machine which to me is important. The machine comes set for 8 ohm speakers. If your speakers are 6 ohms, which is usually marked on the back of each speaker, press the straight button on front of machine and while holding down, press power on. With the screen showing 8 0hm min, press straight button to show 6 ohm min. shut off machine and connect speakers. The owners manual is 111 pages long. If you are using 8 ohm speakers, there will be no problem. The machine itself is very nice and it replaced my yamaha 3064 perfectly, being this is a 3072 model.
