Usually yes, provided the throw ratio suits the extra distance and the fan noise is tolerable at a metre from your head.
The geometry
A position behind the seating is a long throw, so it wants a projector with a higher throw ratio or a wide zoom range. Check the arithmetic: throw ratio × image width, against the distance from that shelf to the wall.
The height problem
From a shelf at head height, the image will land high unless the machine has vertical lens shift or a suitable offset. This is where shelf-mounted projectors most often fail, and no menu setting fixes it without cost.
The noise problem
The specification to read is stated fan noise in decibels, per mode. Eco mode is quieter and dimmer; whether that trade works depends on the room. A projector a metre behind the seats makes this the most audible position in the room.
What makes it work well
A rear shelf or a wall bracket, eco mode in a dark room, and a machine whose zoom range gives some slack in the distance. It is a common and perfectly good arrangement — it is simply the one that asks most of the specification sheet.
Questions people actually ask
Will people walking past cast shadows?
From a position behind the seating, far less than from a coffee table — the beam is above head height for most of its path. That is the main practical argument for the position.
How loud is too loud?
Manufacturers state fan noise in decibels, usually per brightness mode, and eco mode is markedly quieter. A machine a metre behind your head is the worst case acoustically, so it is the position where that stated figure is worth reading before buying.
Last reviewed 4 September 2026