What the maker puts in writing
- “2-way, 3 driver center-channel speaker system” and “Center-channel speaker (single)”
- “Two 3.94 in. woofers boosts low-end frequencies”
- “High precision tweeter for faithful vocal reproduction”
- “Bass reflex enclosure for distortion-free, low frequency sound”
- “Reinforced cellular cone for undistorted audio” and “Premium componentry ensures premium sound”
- “Sony CS speakers are a perfect match for Sony AV receivers”
- Description: “a tuned ported cabinet, rear bass reflex, lightweight voice coil for improved sound pressure, and advanced damping materials”
Two hundred and forty-eight dollars, and the cones are 3.94 in (100 mm)
3.94 inches is 100 mm — the same as a nominal 4-inch driver. Set against the shelf:
2 × 2.5 in — Polk, $79 · 2 × 3 in — Goldwood AA35CB $38.88, Micca OoO $79.99 · 2 × 3.94 in — this, $248 · 2 × 4 in — Goldwood PSC-43 $42.88, Dayton C40 $55.98, both Micca MB42X-C $89.99 · 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 Neumitech at $89.99 has larger cones than this, and so do the Klipsch at $149.99 and three speakers under ninety dollars.
Cone area goes as the square of the radius, and it is what moves air. A pair of 5-inch drivers has about 56 percent more area than a pair of 4-inch ones.
What Sony offers in exchange is material engineering and range matching.
The material claims, taken seriously
“Reinforced cellular cone for undistorted audio.” A cellular — foamed — structure is light for its thickness, and reinforcing it raises stiffness. Both matter: a cone must be stiff so it moves as one piece rather than flexing, and light so it starts and stops quickly.
“Advanced damping materials.” The complement to stiffness. Every cone eventually resonates; damping is what makes that energy die quickly instead of ringing. Aluminum cones — Yamaha’s here — are stiff and ring; a damped cone is more forgiving.
“Lightweight voice coil for improved sound pressure.” The coil is the mass the magnet has to accelerate. Reducing it means more of the amplifier’s energy becomes cone motion and less becomes heat — which is a sensitivity gain, though Sony publishes no sensitivity figure to show it.
Those are real engineering statements. They are also unverifiable as written, since no measurement accompanies any of them.
The rear port is the practical weakness
Tuned ported cabinet, rear bass reflex.
A center channel is the one speaker that always lives in a confined space: shoved into a TV unit with its back near a panel, or against a wall.
In that position a rear port is choked — airflow restricted, bass compressed, and at volume the port can audibly whistle.
Leave at least a hundred millimeters behind it.
The shelf divides clearly on this. Rear, published: this, JBL, Neumitech — the last of which admits the reason is “a more compact design”. Front: Triangle’s BRC2 at $459 alone, which claims bass “without placement limitations” as a direct result. Sealed: Goldwood’s AA35CB at $38.88 and Dayton’s C40 at $55.98, which have no port to choke.
And the range matching, which is the real case for it
Sony CS speakers are a perfect match for Sony AV receivers.
Split that claim in two.
The speaker half is sound. In a film mix, dialogue and effects pan constantly between left, center and right. If the center uses different drivers from the flanks, the sound audibly changes tone as it moves and the illusion breaks. Sony’s CS range — the SS-CS5M2 bookshelf and SS-CS3M2 floorstanding models — uses the same reinforced cellular cones, so a front three from the range blends.
The receiver half is positioning. An AV receiver is electrically agnostic about speaker brand; there is no Sony-specific advantage in driving a Sony speaker.
What is not published
No tweeter size, which every other listing on this shelf gives — from half an inch (Polk) to an inch (six products).
No frequency response. Four products here publish one, and only Klipsch publishes a tolerance (“89Hz - 21kHz plus/- 3dB”), which is what makes such a figure a measurement rather than a claim.
No sensitivity, the figure that decides what amplifier you need — every 3 dB being a doubling of power. The four published figures here run from 95 dB (Klipsch) to 86 dB (Micca G2): a factor of eight.
No impedance and no power handling.
No off-axis treatment. Four listings here address the lobing that afflicts every center speaker — Dayton and JBL with 2.5-way crossovers, Neumitech and Micca’s OoO with tight driver spacing. This one does not mention it.
And 220 mm tall — the second tallest here. Measure the gap under your television.
5,557 g and 220 × 430 × 146 mm are published.
Prices quoted in this text were read on October 4, 2026. The live price is at the top of the page.
