Sub placement

The "put the sub in your listening spot" suggestion is ridiculous (but amusing) so ignore that one. Your room and tastes are specific to you so the only answer has to be to experiment with placement as there is no magic formula...I just loosely followed REL guidelines and my ears...found an ideal spot (for my tastes anyway) after a while. I do turn my sub up and down a little depending on the recording, and have no idea if anybody else does that...but it's the only "tone control" I have and it's all I need.

It's true...bachelors often put their subs in the middle of the room.

I am capable of adjusting my sub using years of experience tempered by personal taste and it does not involve my sticking my head on the back corner floor behind my left main speaker while the sub enjoys a single malt and hip magazine on my listening couch.

Integrating a sub into a system is utterly room and system specific so rendering suggestions on this is tough. Another reason why I can't get the "put your head where the sub sounds best" thing is that it takes the main speakers out of the picture...and the sub/main synergy is where the mojo lives.

Risking redundancy: For my tastes the low notes generated by the sub are part of the musical whole, and I wouldn't hear a proper mix with my head on the floor in the corner. It's easy to get an accurate, musical main/sub blend in a listening space...and not complicated at all. Do not be afraid. Otherwise, maybe you could carefully balance a stack of your main speakers in a pile on top of your sub at the "sweet listening spot", crawl around on the floor until your knees ache and your head becomes crammed into a place where the moon don't shine.