Up-firing needs a ceiling; in-ceiling needs a drill
Height channels come in two forms that ask completely different things of a room. Up-firing modules sit on top of a floorstander or a bookshelf speaker and bounce sound off the ceiling — they need a flat, hard, horizontal ceiling at an ordinary height, and the maker states that condition in the manual rather than on the box. On-wall or angled speakers mounted high do the job directly and work in rooms where a bounce cannot: sloped ceilings, beams, or anything absorbent. The specification then behaves like any other speaker — sensitivity and impedance, since these channels are usually driven by the receiver's last two amplifiers, and the driver angle, which is fixed and decides where the reflection lands. We compare design type, stated sensitivity and impedance, driver angle, mounting provision, and the ceiling conditions the maker states.
Pair · Dolby Atmos certified height speaker · designed for XT20, XT60 and XT70 · wall, shelf or on-speaker mounting
A height module named for the exact speakers it sits on — XT20, XT60, XT70 — which is what makes a matched Atmos layout possible rather than approximate.
Best for: A Polk Monitor XT system: the front speakers, the centre and these, all from one range.
≈ $119 / 161 €
Pair · Tractrix horn 90° × 90° · Dolby Atmos elevation · from the Reference range
A horn-loaded height module with its dispersion pattern published — 90 by 90 degrees — which is the figure that says where the reflection lands.
Best for: A Klipsch system with an ordinary flat ceiling, where the height channels should match the front speakers.
≈ $396 / £329 / 289 €
Pair · Dolby Atmos Enabled certified · up-firing or rear speaker · horizontal or vertical mounting · rotating wall bracket
A certified Atmos Enabled pair that can also be used as an ordinary rear speaker — two jobs from one purchase, which is unusual on this shelf.
Best for: A room where the ceiling might not cooperate — because the same speakers work as rears if it does not.
≈ 300 €
