What the maker puts in writing
- “a 3-way, acoustic suspension tower loudspeaker, this media series tower reproduces sound at high output, with full-range dynamics and broad dispersion”
- “an updated version of nht’s absolute tower, this loudspeaker features a built-in up-firing driver connected via its own separate terminals in addition to the 1-inch aluminum dome tweeter and 3 5.25-inch woofers found in the earlier version”
- “enjoy music and movies almost anywhere in the room thanks to the broader soundstage generated by this 3-way design”
- “add a single or a pair of nht cs-10 subwoofers and for a powerful full range system”
- “licensed by dolby laboratories for atmos playback”
- Title: “Sealed Box | Aluminum Drivers | Single Unit”
The separate terminals are what make the Atmos driver real
A built-in up-firing driver connected via its own separate terminals.
This is the detail that separates a working Atmos tower from a marketing one.
A Dolby Atmos mix places sounds in three dimensions, and the height channels carry different content from the front left and right. A helicopter overhead is not in the same signal as the dialogue.
So an up-firing driver fed from the same terminals as the main speaker would simply be playing the front channel at the ceiling. That is not Atmos; it is a reflection of the front stage.
With separate terminals you run a second pair of cables from a height output on your receiver, and the driver plays what the mixer actually put up there.
Backed by “licensed by dolby laboratories for atmos playback”, which is a certification rather than a claim.
The practical requirement: a receiver with spare height channels — at least 7.1.2, since the two main channels and the two heights each need their own amplifier.
And this is the only tower on the shelf with a height driver at all. Polk’s T-series path ends at 5.1 with no height module; KEF offers Atmos speakers as separate models in the Q Series.
A sealed box, which nothing else here is
Sealed Box… acoustic suspension tower loudspeaker.
A sealed enclosure traps the air behind the cone so that air acts as a spring. Output falls away gently below the limit — about 12 dB per octave — and the cone’s motion stays tightly controlled, giving lower distortion and a crisper transient.
A ported box gains three to six decibels around its tuning frequency and then collapses at roughly 24 dB per octave below it, with possible port noise at high excursion.
Sealed goes cleaner and stops sooner.
Which is why the listing names the remedy itself: add a single or a pair of nht cs-10 subwoofers for a powerful full range system. That is the honest way to build a sealed system — let the small sealed cabinets do the midrange and treble properly, and give the bottom octaves to a box designed for them.
Everything else on this shelf is ported, and the four approaches are worth seeing together: Dayton bass reflex · Focal front and rear vents · Fluance Ai81 down-firing · KEF ported with bungs included to seal it near a wall · Polk passive radiators instead of a port.
Three small woofers, for a narrow cabinet
Three 5.25-inch cones, where most towers here use two 6.5-inch ones.
The areas are close: cone area goes as the square of the radius, so three 5.25-inch drivers have roughly the same total as two 6.5-inch ones. But each is smaller, so the front panel can be narrower.
184 mm wide — the narrowest on this shelf, against 198 (Dayton), 211 (KEF), 249 (SVS), 277 (Fluance Signature), 290 (Rockville), 375 (Focal).
Two benefits. A narrow baffle diffracts less: sound wrapping around a wide front panel creates response irregularities, and a slim front reduces them. Fluance’s Signature attacks the same problem differently, with “a solid 1.4” thick front baffle [that] bears chamfered edges to significantly decrease sound diffraction”.
And it occupies less floor, which matters when a speaker has to flank a television.
The cost is internal volume — less air behind the cones — which a sealed design feels more than a ported one.
Aluminum drivers, and the trade
A 1-inch aluminum dome tweeter, with aluminum woofer cones per the title.
Aluminum is stiff and light: stiffness pushes cone breakup high, low mass gives quick start and stop. The cost is damping — aluminum has little, so when it does resonate it rings at a sharp frequency, and the crossover has to stay below it.
On this shelf: silk (Dayton, Rockville, Polk) is damped and forgiving; aluminum (this) and diamond-coated aluminum (SVS) are stiff and analytical; Focal’s inverted aluminum-magnesium M-dome is stiffer still; both Fluances name neodymium, which is the magnet rather than the dome.
And it is sold singly
$749.99 for one speaker. A stereo pair is $1,499.98.
Three listings on this shelf are per speaker, and it reorders the whole shelf:
Rockville $119.95 (pair) · Dayton T65 $229.98 (pair) · Polk T50 ~$498 (pair, title singular) · Fluance Ai81 $599.98 (pair, powered) · Energy CF-70 $799.98 (2-pack) · Fluance Signature $799.99 (pair) · NHT $1,499.98 (pair) · Focal $1,993.90 (pair) · KEF $2,499.98 (pair) · SVS $3,998 (pair)
What is not published
No frequency response, which on a sealed design is the figure you most want, since the roll-off is the defining characteristic. KEF alone publishes one here: “37Hz (-6dB), with in-room bass extending to 26Hz”.
No sensitivity. A sealed box is typically less efficient than a ported one of the same size, so this is the listing where the number would matter most. KEF alone gives it, at 89 dB, with an amplifier range of 15–225 W.
No power handling and no impedance, where the Rockville at $119.95 publishes 125 W RMS, 500 W peak and 8 ohm.
No crossover detail, and no specification for the up-firing driver itself — its size, its power handling and its own impedance are all absent, which on the feature the speaker is sold for is the odd omission.
15,966 g and 184 × 146 × 1022 mm are published.
Prices quoted in this text were read on October 4, 2026. The live price is at the top of the page.
