So sub or not to sub

Wolf, that's what I thought. Now - in relation the the two monitors, where's the best place Shirley would say to put the sub in the room?

Wow - you all are awesome. Thanks for pdf's and all the advice.

I used the measurements and advice in the HK Whitepapers that Reynolds posted and placed my sub in the corner behind me, facing the monitors. Changed the music incredibly for the better. I set the low-pass crossover at around 60Hz and had to dial back the volume on the sub. But it sounds good.

My "listening room" (i.e. finished basement) is something like 10' by 14' with 7' ceilings, so I don't know how many nodes and standing waves and such there are, but I've been working on amateur room treatments - art canvases; strategically-placed potted plants; a lack of sharp corners - to try and get as much sound as I can.

FWIW, I also found that swapping the Electroharmonix 6922 tubes out of the pre-amp section of the LSA and replacing them with Amperex 7308's also tightened up the bass.