Am I Better Off With Limited Low Frequency Speaker In A Small Room?

Agree with those saying bookshelves plus sub(s) as well put by Soix. 

Could also consider JL Audio e-112 sub(s) for clean bass foundation. 

Good Luck!

["analogj    I'm aware of what subs CAN do,  but I have never heard a sub, even in an audio salon, where I didn't ultimately prefer the sound of the main speakers without them, at least for music."]

If you heard the sub, even in an audio salon, I believe it wasn't, or simply incapable of being properly set up. 

In my experience the upper frequencies benefit from more space not the bass. The earlier 18" version of my current Room Optimization equipped 10" subwoofer used in my 10'x10'x8' studio are only distinguishable when turned off during play. 

All the best with your search.

I have the same size two channel room. McIntosh C-47 pre, MC152 amp, B&W 805d3 and REL T-7x. Room is GIK treated. Added the REL last and by far was the greatest improvement to overall sound; especially at low levels. 

Material of the walls play a big role. Concrete? Huge problem. Wood? Not so.

It has nothing to do with the size of the room, but the limited placement options due to size. Extended low is not inherently bad in a small room, but bad placement is bad in all rooms. A small room forces bad placement. Go subs. The more the merrier.

Actually a small room has inherent challenges because the room dimensions are shorter than the sound waves.

So what happens? Bass builds up unevenly so treatment is required...Treat what you can and then use PEQ (like in ROON) to knock down peaks...

multiple subwoofers are tricky unless you have DSP bass management. Subwoofers don’t help much for problems above 80-100hz...room treatment is best above subwoofer crossover point.

Good news is that a 12x12x12 room CAN sound good. You have front wall and sidewall symmetry. Rooms that have an open sidewall can't really be fixed and IMO have much bigger problems in that they can't create a realistic stereo image.