RPG Skyline mounting on ceiling

Hi Gregm will now try to answer your question ... (we've been away for holiday so I just got back online). I'm no expert regarding room treatments, but this one corner with boomy bass is apparent as I walk around the listening area. The bass accentuates when I approach the front lefthand corner of the room, and is also somewhat peaky at the left rear corner. Righthand side doesn't behave that way at all, as the room is asymmetrical. I'm stuck with speaker placement as-is but wouldn't want to change that anyway since I tweaked it for staging properties.
I think I need to experiment with a corner tune or a tube trap device or two, but haven't yet researched my options or educated myself regarding various posssible appproaches to fix. Roomtunes I am aware of too, but don't have space for those in our combo. listening room / living room area

Bob- found these articles on the Asylum by Jon Risch:
quick and dirty tube trap- http://www.audioasylum.com/audio/tweaks/messages/15737.html
http://www.audioasylum.com/audio/tweaks/messages/17498.html
you can buy the three rolls of insulation in perforated bags for about $60 (quick and dirty) or take the time to build the trap with the wire. I'm going to try the quick way soon. can't lose, you can return anything to Home Depot!

i put them on my tin ceiling in small greenwich village apt, app. a foot apart, but they must be suspended with small wood screws or they will fall down! They do a wonderful job. Neighbors come in and say 'How is it so quiet in here?'

Thanks, Bob. You could temporarily try absorbant matl in the corner behind or on the side wall next & slightly behind the speaker. For the corner, try covering ceiling to floor, if you can. If this helps, you can then look for the appropriately cosmetic application (tube traps usually sound better than they look-:).

Gregm thanks for the great idea! Also much appreciate your referral Kitch. That corner has always bothered me as there is a curtained window in the way. I never even thought of mounting "on the sidewall next & slightly behind the spkr." that's just a fabulous suggestion.
This is such a perfect example of why we should participate in the forums; you never know when someone is going to come up with a great suggestion / solution (to my offhand comment) & I wasn't really even seeking answers, so this is such a pleasant surprise! thanks again y'all!