Stages of creating turnkey home theater acoustics

Demand for home theaters in 2026 almost doubled compared to 2022. There are two reasons: the price of premium sound skyrocketed, and owners of country houses finally started dealing with their basements, which had been used as storage for years.

But half of the projects that come to us for audit after other contractors suffer from one disease. The "acoustics" were assembled from foam acoustic panels according to the manufacturer's line, without geometry calculation. There is sound. There is no home theater.

A client from Tyumen sent a video of his 4-million-ruble hall: Dolby Atmos 7.1.4, Sony projector, Cinemall chairs. The picture was magazine-perfect. The stage was blurry, voices floated around the room, the bass boomed. When we investigated, it turned out that the room modeling stage was simply skipped. They installed speakers and covered the walls with whatever was in the warehouse.

Impulse response instead of sinusoidal tone

Most installers still calculate loudspeakers using the Thiele-Small method (1965, sinusoidal signals). The method works, but its efficiency is 1.5–5%. The rest turns into heat and phase distortions, which the ear hears as a "defocused" stage.

We use impulse response – the Dirac function. This is a short, broadband impulse that contains the response of the "room + loudspeaker + listener" system across all frequencies simultaneously. Most importantly, it provides a full correlation between the protocol numbers and what you actually hear in the chair. Without this correlation, any measurements remain abstract.

Reverberation time: why the goal is 0.3 seconds

The target RT60 for a home theater is 0.25–0.35 seconds in the 250–4000 Hz band. More — dialogues turn into mush. Less — the room starts to sound like a speaker's studio and becomes tiring after half an hour of viewing.

In a bare 30 m² room with drywall walls and laminate, RT60 easily goes up to 0.9–1.2 seconds. This cannot be fixed by eye. Calculated thicknesses and areas of absorbers by one-third octaves are needed – otherwise, you will either over-dampen the highs and leave boomy lows, or vice versa.

Six stages of work

1. 3D scanning of the premises

The laser scanner records geometry with an accuracy of up to 2 mm. Not a BTI plan. Not your sketch. Real walls with all niches, beams, protrusions for communications. The subsequent acoustic model is built on this scan.

A client from Sochi sent a drawing: "room 4.5 × 6 meters, ceiling 3.1". After scanning, it turned out that there was a slanted beam under the ceiling's rounding – it created a standing wave at 87 Hz. A calculation without a scan would have missed this, and the client would have lived with a hum in soundtracks.

2. Acoustic model calculation

The room is modeled in specialized software: modal frequencies, early reflection map, and reverberation time by bands are calculated. The output is a list of problem areas and precise requirements for absorbers, diffusers, and bass traps.

3. Structural design

If necessary — a “room within a room” frame, decoupling from load-bearing walls, a floating floor. Layer thicknesses, mineral wool densities, types of vibration isolation — all with specific numbers from the model, not “as we usually do”.

At a country house in the Moscow region, the client wanted a home theater in the basement next to the children's room. To achieve Dnt,w 68 dB, we assembled a five-layer structure with a total thickness of 240 mm. Such a thing cannot be built without project calculation – every membrane is critical there.

4. Equipment selection for the premises

Not a room for speakers. On the contrary. After modeling, it becomes clear which loudspeakers will reveal their full potential in this particular geometry. Sometimes, a set for 600 thousand loses to a pair for 180 – because the first simply has nothing to "give" in this room, while the second fits its acoustic profile.

5. Installation of acoustic elements

Absorbers are placed not where the designer wants, but at the points of first reflections – calculated at the modeling stage. Bass traps go into the corners. Diffusers – behind the audience zone, to expand the stage. Each panel is tied to a coordinate on the scan.

6. Final calibration by impulse response

Measurements in all seats, DSP correction, cross-referencing with the calculated model. Permissible deviation is up to 5%. If it's more, we go looking for the cause: most often it's an unsealed gap in the structure or an improperly installed subwoofer.

What to look for when choosing a contractor

If the commercial offer does not include 3D scanning and an acoustic model — it's not “turnkey”. It's a set of materials with a markup for installation.

Ask directly: “What methodology do you use to calculate loudspeakers?” If you only hear Thiele-Small in response, prepare for low efficiency and unclear mid-range. Impulse response in the answer is a good sign.

Check if they provide a final measurement report. Without it, you won't be able to prove that you received the stated parameters, and there will be nothing to argue about a year later.

And finally – deadlines. A "turnkey" cycle physically cannot fit into three weeks. Just the drying of a floating floor screed takes 28 days. If they promise "everything in a month," they are cutting corners on stages – usually on construction and final calibration.