Hi guys,

I have my room at a point where I need to make a decision regarding speaker placement. The room is 4m wide, 5.2m long and 2.6m tall - final measurements will reduce maybe 300mm on each wall, due to acoustic treatments. I will lose 600mm length due to a Screen Research 120" wide 2.35 TheaterCurve screen. Speakers will sit behind the screen and SW5500 sub probably below (all hidden from view).

My question is about the surrounds. I'm looking for opinions for this size room on the effectiveness of 7.1 vs. 5.1. If I go 7.1, then surrounds will more than likely be two pair of DSP3100s mounted within the wall. If I go 5.1 then I will try and find a 2nd hand set of DSP5200s and place them angled at the rear of the room.

I'm wondering if the room is too small to consider or make the most of 7.1?

Seating will be for four on a raised platform, 3.5m back from the screen. Source will be 1920x1080, so not too worried about video quality. The room will 95% be used for movies and usually more towards action and adventure - Chronicles of Riddick, 300, Highlander, etc.

All opinions welcomed.

Cheers,

Chris

3x DSP5200 L, R and C (all vertical), 4x Triad Silver in-wall surrounds and 6x Triad Silver in-ceiling ATMOS speakers, Triad Silver subwoofer, Denon AVR-X8500H, JVC DLA-7500 4K projector and Screen Research 120" AT 2.35:1 screen.
Apple TV 4K and Oppo UDP-203 Blu-ray player.