Polk LSiM 703 or R900 for Height Speakers 7.2.4

mpitogo

See signature for media room theater equipment. I'm torn which direction to go. I read LSiM 703 are heavy and a PITA to wall mount. Atmos/DTS-X/Auro-3D.

mpitogo

LSiM 703 two pairs

breaking it in

mpitogo

LSiM 703 two pairs

Temporary PM-10 for 2.0 setup with airplay

mpitogo

LSiM 703 two pairs

Slowly getting stuff in place.

Emlyn

R900 two pairs

Mighty impressive looking!

Only suggestion/question is would the rear speakers perform better if they're even with the rear heights? Meaning, away from the side walls about a foot or two?

My guess there's a good reason you put them where they are.

mpitogo

LSiM 703 two pairs

Hi Emelyn,

Thanks. Per polk manual it’s the recommended orientation, the mid and tweeter drivers are side firing so with them at the far corners the drivers are firing into the MLP. The directivity would be affected if I moved them close into the room, as surround backs I think the 703 would be better suited. I don’t have amps yet (was ordered and in production) so listening demos will have to wait a bit till I would know.

Emlyn

R900 two pairs

Makes good sense. I'd forgotten the driver configuration on those was like that with essentially no sound coming out one side of the cabinet.

I was also thinking a pair of 703s could serve well as rear surrounds. I've had both models in that position and preferred the 703s but they were close and I have another pair of 703s as side surrounds. I figure it's best to have all four the same model in those positions.

I think you'll be extremely impressed with those front and rear height speakers for Atmos.

CottageChz

Looks great!

F1nut

That's a small space for all those speakers.

WLDock

F1nut wrote: »

That's a small space for all those speakers.

I'm wondering if its a dedicated built space with Green Glue between drywall layers or made with factory damped Gypsum? I can't tell the lengths but it looks to be about 12 ft. wide. The 7.2.4 sides are a little close to the rears. No doubt a 5.2.4 would have been more than fine.

That system is going to light that space up! (and maybe the house?) Should be able to get some good pressurization going on. It should be a very intimate experience! Should be fun!

mpitogo

LSiM 703 two pairs

12.5W x 20L x 10H

Unfortunately the walls are not green glued or dampened, I will need to put up more acoustic treatments. I tested the heights running full range and the cabinet vibration travels through the speaker mount into the studs. Hopefully not an issue when crossed over at 80hz.

Two rows of 3 chairs are coming in this Wednesday.

kglass

what type/brand mounts are those that you are using for the 703's?

eclypse

I was gona ask the same question.. attaching a mount to the plastic like that.. it held up? Heavy speaker.. if so I'd like to know what mount you used cause I'm debating having mine as height channels.

mpitogo

LSiM 703 two pairs

The mount's are screwed through the plastic down to the wood. I've had no issues with them hanging up almost 2 years now. I was thinking of upgrading the attachment with T-nuts on the inside and switching to machine screws with standoffs.

Geoff4rfc

mpitogo wrote: »

The mount's are screwed through the plastic down to the wood. I've had no issues with them hanging up almost 2 years now. I was thinking of upgrading the attachment with T-nuts on the inside and switching to machine screws with standoffs.

Well, I think it's probably time for some finished pics.....you had me at "two rows of 3...". And maybe a rundown of your finished theater.....and your thoughts on it's performance since completion.