Dedicated room suggestions

Hi all. I have an unfinished room that is 13x16.10. 
My system is a Cary Audio Tube amp, DMS650 streamer and DAC. And my very large Klipsch Cornwall IV speakers. 
I’m new to the game and looking for suggestions regarding layout and room treatments. Wondering if the speakers should go on the 13’ wall or the other way around. And any acoustic panels that can enhance sound, how many and where should they go?
Thanks in advance.