What the maker puts in writing
- “Recommended power is 15-150 watts, Frequency response is 85hz-25 kHz, efficiency is 89dB, 8ohm, 2-way passive design”
- “Two 4” Full range woofers, 1” Mylar dome tweeter, mounting hang tab on back, quick Release spring loaded wire terminals, video shielded, digitally tuned bass reflex cabinet Enclosure”
- “Acoustically transparent grill, Black ash wood grain veneer finish, speaker size (H x W x D) is 4.01” X 13.85” X 5.74”, designed and engineered in the USA, full instructions included”
- “This Listing and price is for 1 indoor speaker”
- Description: “The Digitally tuned bass reflex enclosure fights internal vibrat[ion]”
Four-inch woofers for forty-three dollars
Which puts it in good company on this shelf. The woofer sizes here:
2 × 2.5 in — Polk TL1, $79 · 2 × 3 in — Goldwood AA35CB $38.88, Micca OoO $79.99 · 2 × 3.94 in — Sony, $248 · 2 × 4 in — this, Dayton C40, both Micca MB42X-C models · 4 × 4.5 in — JBL, $439.95 · 2 × 5 in — Neumitech, $89.99 · 2 × 5.25 in — Klipsch, $149.99 · 2 × 6.5 in — Triangle, $459
So four-inch cones for forty-three dollars, where the Sony at $248 uses 3.94-inch ones — which is the same thing in metric, 3.94 in (100 mm).
Cone area goes as the square of the radius, so a pair of 4-inch drivers has about 78 percent more area than a pair of 3-inch ones. On a center channel that matters for the lower register of a male voice and for the body of an explosion.
And the amplifier range is published, which almost nobody does
Recommended power is 15-150 watts… efficiency is 89dB, 8ohm.
Two figures that work together, and only one other product on this shelf gives both: the Goldwood AA35CB at $38.88 (92 dB, 20–200 W).
Sensitivity decides how loud a speaker plays per watt, and every 3 dB is a doubling of required power. The published figures here: Klipsch 95 dB · AA35CB 92 dB · this 89 dB · Micca MB42X-C G2 86 dB. Nine products publish nothing at all.
At 89 dB this needs twice the power of the AA35CB and half that of the Klipsch.
And the lower bound of the range is the important one: an amplifier driven past its limit clips, producing high-frequency energy that burns tweeter coils out. Far more speakers die of too little power than too much.
Video shielding, which dates the design
Video shielded.
The driver magnets are enclosed so their stray field does not escape — and that mattered enormously when televisions were cathode-ray tubes. A CRT steers an electron beam with magnets; an unshielded speaker magnet beside one bends that beam, producing a colored patch or a distorted corner.
Flat panels have no electron beam. There is nothing to deflect.
The claim is not false. It is answering a question nobody asks, and it tells you something about the design’s age — rather in the way a Blu-ray player still advertising “Hulu Plus” does.
Where it would still apply: an old CRT monitor, or a magnetically sensitive instrument on the same shelf.
The port direction is the gap
Digitally tuned bass reflex cabinet.
So there is a port, and the listing does not say which way it fires. On a center speaker that is the most consequential omission possible, because this is the one speaker that always lives in a confined space.
A rear port pushed into a cabinet or against a wall is choked: the bass compresses and at volume the port can audibly whistle.
The shelf divides clearly. Rear, published: Sony, JBL, Neumitech. Front: Triangle’s BRC2 at $459 alone, which claims bass “without placement limitations” as a direct result. Sealed, so indifferent: the AA35CB and Dayton’s C40.
If this is going into a tight unit, leave clearance behind it.
Twenty-five kilohertz, and Mylar
Nothing at 25 kHz is audible as a tone — hearing stops near 20 kHz in youth and lower with age. What a high limit indicates is where the dome’s first breakup resonance sits: a resonance at 21 kHz can color the treble you do hear; one at 30 kHz cannot.
Mylar is a thin polyester film — light, and it extends high, which fits the claim. It is the only Mylar dome on this shelf, against silk on most and aluminum on the Klipsch, JBL and Yamaha.
The missing piece is a tolerance. Only Klipsch publishes one here.
Small things that add up
A hanging tab on the back, so it can go on a wall without buying hardware. An acoustically transparent grille, which is the right claim — a grille that is not transparent audibly dulls the treble. Full instructions included. And it states plainly that the price is for one speaker, which at least six of the seventeen listings here feel the need to clarify.
Spring-loaded terminals take bare wire only. Dayton’s C40 is the only product here with gold-plated binding posts for banana plugs — and the only one that recesses them, which matters when the back of the speaker meets a wall.
2,722 g and a published 4.01 × 13.85 × 5.74 in.
Prices quoted in this text were read on October 4, 2026. The live price is at the top of the page.
