room treatment gurus, please

You can still enjoy the system by using the right volume, not to overwhelm the room.Maybe you can use room divider that folds .

Having tried three types of room treatment in two awkward rooms and comparing these to a one room that is close to ideal. I tried Dirac (Datasat and others), Trinnov (both multi and 2 channel / 2.2 channel) and Lyngdorf "roomperfect".

Only Trinnov gave the level of performance and integration I was looking for (initially tried ST2 HiFi, then Amethyst). I have glass on two sides in awkward places in one of the rooms and on all for sides two with awkward places in another.  The difference between on correction on / off and completely bypassed (just to check against 'off) is huge.

But I acknowledge that some of the DSP benefit is that in both instances I am using speakers with smaller bass drivers than I would like and consequently I am integrating speaker arrays / sub integrations which would not be "an advantage" in a 2.0. 

However, where one of the sets of speakers I use are 2 way then I found the dsp crossovers were for both a single seat and especially for a multi-listening position more effective than either single or bi-amping without correction.   Comparing this to the set-up in the 'ideal' room gave a 'awkward room' performance that was quite close. Even the 'ideal', gained in timephase precision.

To be clear I am not in anyway suggesting that physical correction should not be undertaken or ignored.  But in cases where I simply could not remove windows, etc., Trinnov DSP did and excellent job.  

Get the book and make a call to the author; he's very accommodating with his expertise:

Get Better Sound by Jim Smith

Consider suwoofers, which could be placed in a location where the bass modes couple better to the listening position. 

Thanks for all the suggestions. Looks like I have some research to do.