— Projector Throw · Premium home cinema
JVC DLA-NZ800 throw distance & placement, 120-inch screen
Problem. A dedicated cinema room built around the JVC DLA-NZ800 needs to know how much back-wall depth the projector actually demands before the screen size and seating layout are locked in. At a 120-inch 16:9 image, the placement question is whether the room's real-world depth falls inside the lens's working range or forces a compromise on screen size.
Answer. For a 120-inch 16:9 screen (2.66 m wide), the DLA-NZ800's zoom lens places the projector anywhere from 3.8 m to 7.77 m from the screen. That is over 2x of usable placement latitude, so most dedicated home cinema rooms — short or long — can seat the projector at the back of the room without a special short-throw or long-throw variant.
02 / In depth
How this preset reads — the engineering view.
The DLA-NZ800 uses a zoom lens rather than a fixed-throw optic, and at a 120-inch 16:9 image that zoom spans 3.8 m to 7.77 m of throw distance. In practice this means the room dictates the mounting point rather than the other way round: a shorter room can sit the projector near 3.8 m and zoom in, a longer room can push it back toward 7.77 m and zoom out, and both land on the same 120-inch image without changing the screen.
2700 lumens on this model is calibrated for a fully light-controlled room rather than a bright living room — at 120 inches with a neutral-gain screen and the lights off, that output supports a proper cinema image with headroom for the laser light source's long-term brightness stability. Native 4096x2160 resolution means the panel is mapping true 4K content pixel-for-pixel rather than upscaling from a lower-resolution chip, which matters most on a screen this size viewed from typical seating distances. Together, the profile suits a dedicated, blacked-out screening room built for 4K/HDR source material, not a multi-purpose or ambient-lit space.
From this preset, drag the screen-size slider to see how the 3.8-7.77 m throw window narrows or widens as the image grows or shrinks, and use the lens-shift and zoom fields to check whether a specific mounting point (ceiling bracket, rear shelf, credenza) still lands inside the lens's working range without resorting to a keystone correction.
The calculator sizes throw distance only. It does not account for screen gain or ambient-light-rejection material, mount type or drop distance, the specific lens variant if the model line ever ships in more than one configuration, or the audio and acoustic treatment a cinema room needs alongside the picture.
What this preset deliberately does not solve
- 3.8-7.77 m assumes a 120-inch 16:9 screen; other aspect ratios or screen sizes shift both ends of the range.
- 2700 lumens is a light-controlled-room figure — any ambient light or a low-gain screen will reduce perceived brightness and contrast.
- Laser light source figures assume factory calibration; real-world brightness depends on installation, screen material and maintenance over the unit's service life.
How this preset differs from its siblings
Fixed-throw premium home cinema projectors give a single throw ratio and therefore one throw distance per screen size, leaving the room to accommodate the projector. The DLA-NZ800's 1.43-2.92:1 zoom range instead gives a placement window nearly double the width of a typical fixed-lens model, which is why this preset exists separately: the reader is checking whether a specific room depth falls inside a wide zoom range, not comparing a single fixed number against their wall.
02 / What that means, drawn
Side view, drawn to one scale in both directions. The screen is 2.66 m wide by 1.49 m high, and the projector stands 5.78 m from it. The current zoom position is what the projector is drawn at. The window of mount positions DLA-NZ800 allows at this image width runs from 3.80 m to 7.76 m from the screen. The projector sits inside that window, with 1.98 m to spare towards the screen and 1.98 m to spare away from it. The recorded vertical shift lets the lens axis sit up to 1.20 m off the image centre at this image height; that window is marked at the projector.
03 / Hydrated calculator
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