You could do that but whats the point ? First center channel speakers are not needed for stereo music, and not even really needed for surround sound unless the main speakers are far apart due to speaker placement limitations.  As long as you have your main left and right speakers placed around 7 ft apart and not more than 10 ft apart, you don't need a center and your fine.  Kevin  40 years high end audio video specialist ... View more

A little more detail would be nice, you haven't even told us what kind of speaker you are talking about. Typically speakers do not have an input and an output, they have a positive terminal and a negative terminal.  The only speakers I've seen input/output jacks on are speakers which have internal amplification. In that case, the input and output jacks would be RCA jacks. The output jack is so you can "pigtail" one speaker to another (ie connect speakers in a chain). My computer speakers are like this. ... View more

all channels should be the same level except for the sub channel...you will be hard pressed to find a sound meter at reasonable cost that will measure a sub woofer correctly....I got my sound meter at radio shack for about $40 bucks and its useless below about 100hz...also if your going to use one meter for the sub and another for the satellites that is not going to work for you either. Some people have said that the way to do it is raise the volume of the sub during calibration and then after calibration reset the sub to a lower level... What I would recommend and the way I did it was run your calibration system; then set up your sub by ear to match the speakers then rerun the calibration system and see if the changes will take hold; also you may want to readjust again and maybe again....I know that when I first set up my speakers and sub it took me about 3 months to get satisfaction with new ideas and adjustments every few days or at least once a week....to get it right...I had to readjust everything several times before I was able to get smooth sound from music and movies..my problem was music; Movies seems to fall in line right away but the adjustments that the Calibration was doing to the speakers made my music sound harsh and flat as if I was listening to an FM radio instead of high quality CD's and the sub was actually too loud for most music...so I tried a lot of different ideas before getting it to sound smooth on both movies and music...In fact it really didn't turn out right till I heard a friends home theater system that had been adjusted to perfection and I was able to come back to my house and hear the deficiencies in mine more easily.....so what you might want to do is go down to a local dealer with some of your CD's or Blu rays and listen to how they have it set up....today I can adjust the system after calibration in about 5 minutes because I know what to do....and I don't need a meter either as most of the settings come out the way I want just using calibration..... ... View more