Just an FYI, that room is going to be a veritable echo chamber, resulting in smeared sound and difficulty in recognizing dialog. Rugs, soft furnishings (not leather), heavy curtains, soft wall hangings (no glass) will be very helpful in taming those issues. As to your front three speakers, I would go with either a 3 channel PASSIVE soundbar solution, or three separate speakers surrounding the TV.
BTW, if aesthetics require lots of hard surfaces to remain, then you may want to check into proper treatments for that room. If you contact a company like GIK Acoustics (one among many options), they will look at your situation and design a solution for you. They have a wide variety of options, mimicking almost any piece of artwork you can imagine. Leaving the room as is, will only result in a frustrating aural experience for you and your family. The design services are free.
For a soundbar, the Golden Ear would be my choice, as it has very limited vertical dispersion, and should help a bit with the initial reflections. It will need to be placed either on top of the TV (best), or under the TV and positioned at the very front of the cabinet on which it sits. In either case, it should be angled a bit upward or downwards, towards the seated ear position.
BTW, a passive soundbar is powered by a receiver, so all the $ you spend on it are used for the speakers themselves, not the licensing, bluetooth, amps ... and allows you to replace the amp when it fails or you want to upgrade to a new model, without having to dump the speakers in the process.
For 3 speakers, choose three tall, narrow speakers, surrounding the TV at the sides and above for the center channel (under the TV will cause early reflections off the top of the cabinet, so that is not recommended). Lots of options here from Def Tech, Revel, PSB, Paradigm, Totem, Triad ... the list goes on. If you place the speakers right up against the TV, it will hide any wiring, however you will pay a price in a narrow sound field. If you spread out the speakers, you can hide the wiring behind the TV "wall" or run a discrete wire cover (painted to match) directly to the speakers.
Another option for three speakers is more of a bookshelf approach, with two bookshelf and one center channel sitting directly on the top of the furniture, at the very front (recessing it back will just add to the echo effect and destroy the sound). So, if WAF precludes putting the speakers at the front, then avoid this option altogether. If you go this way, be sure to have rubber feet installed to isolate the speakers from the furniture to avoid resonances. Also, there is the kid factor, as those speaker positions would be an accident waiting to happen, if they are the rambunctious sort.
What size is the TV, how far away will you sit?
You will need a subwoofer, or perhaps two, in that room and some alternate placement options to be assured that you get good even frequency response. Good frequency response in the bass region is almost entirely dependent upon the position of the sub and the seating.
It's a VIRTUAL channel unless stated otherwise.
Last edited by RayGuy; 06-12-2019 at 10:12 PM.