All wrong answers so far. Loudspeaker impedance is never one raw number, the word we use is nominal impedance. In most cases you could use the 8 ohm taps or the 4 ohms taps. Most of us try both and use the one we think sounds best. There are exceptions with loudspeakers that have very low impedance points. If you have a loudspeaker that dips well below 4 ohms, you'll pretty much want to use the 4 ohms taps but that question seldom comes up because it's rare to see hard to drive loudspeakers hooked up in a multi-channel system.
What does switching back of amp from 8 to 4 ohms do?
I have three speakers including a center and the left and right are connected to 4 ohm jacks on the back of the 600 W mono blocks i have.
I have a Multi channel amp that has 250 W and only have the center connected to it. The switch on the back of this app can toggle between four and eight Ohms.
If I change the switch on the back of the multi channel amp from 8 to 4 Ohms how will things be impacted?
Will volume levels be reduced? Impact to sound quality? Good idea?
I use 4 ohms for the main speakers as I was told it would be better since I have more than enough power to drive them. Not sure what difference it makes
Thought changing the center speaker to 4 might be good to be consistent with the left and right speakers