Where to locate Equipment?

I have seen countless setups with the AMPS, DACS, Turntables, etc, all positioned BETWEEN the speakers.  Years ago, I thought this was taboo, and I have always had my equipment to the left of my listening position. I can see the benefits, using short speaker cable runs, etc, but, was/am concerned about that occupied center spot affecting listening quality in some way? 
My room is a rectangle, approximately 19x14x8, carpeted, drywall, pretty normal room for a 2ch system.  Any replies, comments, suggestions are welcomed. Have been away from the hobby for about 20 years, and finding many things have changed during that time.  Thanks in advance.