Klipsch Quartet: Suggestions for Setup & Pairing

It can be hard enough to place a pair of subs. With a fullrange speaker, you have to find a placement that works for low bass and the mids and highs. Getting them off the ground maybe the best place to start. You will just have to experiment until you find the best compromise. The passive radiators on the back don't make it any easier. A lot of Klipsch speakers sound best near room corners. Good Luck!

Didn't answer the pairing question. With my similar Forte IIs, have had good results with a few different amps including a Marsh A400 and a Cambridge Azure integrated. Notably, I got very nice results with my HLLY Tamp-20 12wpc t-amp. You don't need much to drive them, and the Tamp-20 even delivers deep bass.
The t-amp is one of the main reasons I was looking for Quartets or Forte IIs. Big fun, (nearly) full range for chicken scratch!

I have heard tubes make Klipsch speakers "open up". The same has been said about t-amps. I have not had my Fortes very long, and now they are put away until after Christmas. Almost all of my listening has been with my Tamp-20. The sound stage is not narrow in my 16' wide room.
I'm curious, is there much of a difference when using the Pioneer and the Mac? Room interface is so important with any speaker. The Fortes do better than some "fullrange" speakers I have used in my room. Have you used other speakers with extended low end in your room? Also, vocals have been pretty good in my case. Don't give up, they can sound darn good.