MarkAudio Alpair 11MS Large Diameter Damperless Screwdriver Unit a pair6.5" (Approx. 165mm class)
Product code:MarkAudio Alpair 11MS Large Diameter Damperless Screwdriver Unit a pair6.5" (Approx. 165mm class)
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Overwhelming resolution and natural sound spread
The single suspension design creates a supple and dynamic sound
A typical speaker unit has two suspension mechanisms: an edge and a damper (spider) to support the movement of the diaphragm. However, the Alpair 11MS adopts a unique single-suspension design and eliminates dampers. By supporting the diaphragm only with the edges, it achieves smooth operation without unnecessary restrictions and overwhelming resolution.
This design allows the diaphragm to move more freely, faithfully reproducing even the smallest sound nuances. With no damper loss, the sound rises quickly, producing a natural resonant and expansive sound. On the other hand, the voice coil and frame are designed with high rigidity to ensure stability at amplitude. This improves controllability during large inputs, which is considered a challenge for single suspensions, and achieves break-free playback.
In addition, the Alpair 11MS features an Xmax 8mm long stroke design. Even in general home use, it can reproduce rich and deep bass while suppressing unnecessary low frequency overamplification.
The ultimate full-range unit that allows you to fully enjoy the sense of openness and delicate expressiveness unique to a single suspension. It's the perfect choice for audio files looking for authentic music playback.
| Revc (Voice Coil DC Resistor) | 7.20 Ω |
|---|---|
| Fo (Lowest Resonant Frequency) | 44.87Hz |
| SD (effective vibration area of diaphragm) | 111.220 cm² |
| VAS (Equivalent Oscillating Mass Volume) | 20.36 L |
| CMS (Vibration System Compliance) | 1.159m M/N |
| MMD (Diaphragm + Voice Coil Mass) | 10.85 g |
| Mms (Total Mass of the Vibration System) | 1.96 WM |
| BL (Flux Density × Voice Coil Length) | 7.654 T· M |
| Xmax (Maximum Linear Amplitude) | ± 8.0mm (one way) |
| PWR (Accepted Input) | 35W (Continuous) |
Transparency and resolution due to damperless construction
"The damperless structure completely eliminated the muddiness of the sound."
By eliminating the damper (spider), which contributes to the mudding of the sound in conventional units, the braking of the vibration system is extremely natural, resulting in a very clear and pure sound with almost no incidental sounds.
"The reproducibility of microsignals is excellent."
The elimination of resistance caused by the damper allows the cone to move extremely freely, especially at low volumes and in delicate expressions, and greatly improves the reproducibility of micro-signals. I feel that the depth of the sound field and the expression of reverberation are realistic.
The headroom and low frequencies brought by the large diameter unit
"Diameter 6.5 inches. It's an overwhelming sense of scale."
As for the full range, it is a large-diameter 6.5-inch class, so it achieves ample reproduction, and has an overwhelming sense of scale that cannot be obtained with small-caliber units, as well as rich, natural low-frequency reproduction capabilities.
"The sound has weight and stability, and it's very musical."
Not only is it a high resolution, but it also has the weight and stability of the sound unique to a large aperture, allowing you to experience a very musical and convincing sound in your listening.
