MAOP processed model of Markaudio’s largest-diameter Alpair11MS
A new frontier for 8-inch metal cone full-range drivers
The MAOP_11MS is the latest model based on Markaudio's Alpair11MS, the largest-diameter damperless unit, featuring the proprietary MAOP treatment. In addition to its inherently delicate expressive capabilities from the damperless design, the unique superior damping characteristics of the MAOP treatment have been combined to deliver an extremely smooth and musical sound.
Use of pure copper rectangular wire – acoustically optimized to the extreme
This unit is equipped with a specially designed voice coil using Rectangle Pure Copper Wire. Like a high-performance racing engine, it has been thoroughly optimized for lightness. A key feature of this coil is that it can reduce weight by several tens of percent compared to the same magnetic force, with many direct benefits to sound quality such as reduced linear resistance and suppression of self-resonance.

Additionally, the unit’s structure has been refined with a mix of fiberglass and ABS resin chassis. The magnet portion is covered with rubber to minimize the impact of resonance.
Thorough attention to the often-overlooked rear fluid design
While many theories are applied in enclosure design, the fluid characteristics at the rear of the speaker unit are often overlooked. The MAOP_11MS addresses this by adopting a design based on fluid dynamics, maximizing the unit’s potential and delivering astonishingly natural and transparent sound.
Highly acclaimed at audio events
The prototype of this unit was showcased at audio events in Japan and received high praise from enthusiastic listeners. The delicate expressiveness of the conventional Alpair11MS combined with the unique control of the MAOP results in smooth and rich music reproduction. This model, which further expands the potential of full-range drivers, has attracted significant interest.

MAOP – High Electric Field Oxidation Crystallization Treatment
MAOP (Micro-Arc Oxidation Process) is a special oxidation crystallization treatment applied to the surface of aluminum-magnesium alloy cones. In this process, oxidation is carried out over a long period in an alkaline electrolytic bath under a high voltage of 700V, forming countless fine crystalline structures on the cone surface. This treatment transforms the cone surface into a unique crystalline texture with a subdued gloss. Crystals containing numerous tiny air bubbles are formed, which significantly affect the acoustic characteristics.
MAOP is not simply a coating, but a treatment that changes the cone itself. As a result, the cone's mass increases by less than 0.4%, making it much lighter compared to conventional coatings. Countless crystalline structures and micro air holes, resembling a sponge, can be observed. This precise structure maintains the rigidity of the metal while appropriately dispersing and absorbing vibrational energy, creating a damping effect similar to that of a pulp diaphragm. Consequently, extremely flat frequency characteristics and a quiet, transparent sound quality are achieved.

| SP Unit | MAOP_11MS |
|---|---|
| Maximum Input | 35W (Nom) |
| Output Sound Pressure Level | 89.0dB /1w@1m |
| Rated Impedance | 6.8Ω |
| Mms | 10.1g |
| Xmax (1 way) | 8.0mm (1 way) |
| Dimensions | 172 x 80.2mm |
The Ultimate Fusion of MAOP and Damperless Design
"The damperless structure and MAOP treatment have completely eliminated sound coloration."
The absolute freedom of the vibration system enabled by the damperless design, combined with the ideal damping effect of the MAOP-treated cone, fully removes the ancillary sounds and muddiness typically present in conventional units, resulting in sound with ultimate transparency and quietness.
"The speed of sound attack and the realistic fading reverberation are astonishing."
Thanks to the lightweight MAOP treatment and damperless design, the transients (sound responsiveness) are extraordinary. Not only is the attack fast, but the minute reverberations and spatial information at the fading moments are accurately reproduced, giving a sense of being in a live venue.
A scale that surpasses the conventional limits of full-range speakers.
"A sense of scale and richness that goes beyond the limits of a full-range speaker."
By combining a large 6.5-inch-class diaphragm with an ideal cone material, it delivers an overwhelming sense of scale and deep, rich low-frequency reproduction that surpasses conventional full-range units. The sound remains full-bodied even at low volumes, maintaining a deep musicality.
Quality Control and Ownership Value
"It offers high-quality control and a sense of ownership befitting a limited edition model."
As a limited edition model that has undergone a rigorous production process, the precision of manufacturing and the matching of acoustic characteristics are exceptionally high. Both the tactile feel when holding the unit and the sound it produces provide a sense of pride in ownership.










