Surround sound with the couch against the wall

Why standard diagrams don’t fit

Speaker layout diagrams show the listener in the middle of the room, with surrounds beside and behind. In many living rooms the sofa sits against the back wall, so there’s no “behind”. CEDIA/CTA RP22, the residential home-theater recommended practice, addresses this directly: it strongly advises against seating against the back wall, and if you can’t avoid it, use side surrounds rather than rear surrounds.

Where the surrounds go

• On the side walls, level with your head or a little behind it, 90–110° from straight ahead (the range in Dolby’s installation guide). At 90° they’re directly beside you, which works fine; a little behind is better if the wall allows, and the usual target in an open room is about 110°.
• At about ear height (1.2 m, 3.9 ft), or up to about a foot above so the sofa arms don’t block them.
• Aimed at the main seat.
• No side walls nearby? Use stands at the ends of the sofa, or wireless surrounds placed to the sides. Sonos’s guidance is behind and to either side of the usual seat, which against a wall means beside it.

Why not 7.1?

Rear surrounds belong 135–150° from straight ahead, behind you, at a similar distance to the other speakers. Against the back wall they’d be a foot or two from your head: much louder and earlier than everything else, with the rest of the room’s sound pulled toward them. Spend the money on height speakers instead.

Height speakers fit this room

A 5.1.2 layout adds two in-ceiling speakers slightly in front of the sofa (about 80° up, per Dolby), which works perfectly well with the sofa against the wall. If you can’t cut the ceiling, up-firing modules on the front speakers or an Atmos soundbar work with a flat ceiling between about 7.5 and 14 feet. See Dolby Atmos placement.

The bass problem, and the foot that fixes it

Bass builds up at walls, so a head pressed against the back wall gets too much of it, and it can sound boomy and slow. RP22’s entry-level guideline is at least 0.5 m (about 20 inches) from your head to any wall. You may not get that far, but every bit helps: moving the sofa forward a foot, then re-placing the subwoofer with the subwoofer crawl, often cleans up the bass more than any setting.

Plan it for your roomSet your seat close to the back wall in the planner to see the side-surround positions. Open →