sonos beam gen 2 asymmetric room layout

Not had any experience with that type of room, but almost all installs are different.

If Atmos is important, I’d suggest an Arc Ultra. While the gen 2 Beam can interpret the input, it doesn’t have the upward firing speakers. If Dolby Digital is most important (and frankly, the vast majority of signals are Dolby Digital), then a Beam is a wonderful device. 

But only your ears can be the decider, not mine. I’d recommend, if you can, listening to both at a dealer’s, but you’ll need to recognize that their ‘room’ will have different acoustics than yours (often better, they’re designed for it).

Volume isn’t significant, one isn’t ‘louder’ than the other.

Given that both devices connect via ARC/eARC, there should be no issue with lipsync. If there is, there’s something wrong with the TV, not with the Sonos. And can be fixed, most often. 

The Arc will fill a larger room than the Beam and the longer length gives a larger "image" sweet spot.

We swapped a Beam for an Arc and were very happy with the results. The Beam is now in a smaller room where it is great.

Question…

Are you saying that the soundbar would be placed on the long wall at about the mid point?

It may go on the wall or possibly on the cabinet beneath the tv. The cabinet sits about 2 feet of the ground (height of sound bar). 

I thought comments may lean to the ultra which is a shame as I thought beam be good enough if the length of room was shorter.

What size TV are you planning? You will want a bigger soundbar (ie Arc Ultra) with a bigger TV, for aesthetics. LG TV would be my choice.

Will be 65inch

I would suggest Arc Ultra for TV size 50”+

The Beam will work in that room, just with the limitations I described. If you are willing to accept them there is no reason not to get one and save a few bucks.

Personally I'd mount either one higher if possible, some of the ones that connect to the TV mounting brackets are an excellent choice. Unobtrusive, easy to hide wires, no holes to drill in your wall.

Actually my question was not pertaining to where you would mount the TV; but whether or not it will be positioned along the short or long wall. How you choose to mount it (or not) doesn’t matter in the context of my inquiry.

Oh its going on the short wall. 

Also can anyone advise on recommended pull down tv bracket. Bit like mantle mount. Im in the uk so they don't sell it here. Need a pull down pull out bracket to lower at certain points and bring away from radiator once its lower.