2.1 + 2.0 = a perfectly normal 4.1?

I wanted to know if I buy one 2.1 and one 2.0 (the rear) and make a 4.1 system with it, would it sound the same as a normal 4.
When playing music with this 4.1 system (w/ CMSS) the rear speaker was a lower quality copy of the front speaker, is it normal?
I also would like to know if I can, someway, make a 5.1 or 7.1 system that way. I tried making a 6.1, but the center rear speaker didn't work, 5.1 and 4.1 worked fine

...nobody...

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Welcome to Apple Discussions!
There does seem to be contact information for Bulgaria:
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