Despite its small size, the Concerta M12 monitor loudspeaker delivers outstanding accuracy over a remarkably wide frequency range. Two proprietary transducers, a sophisticated filter network, and an acoustically inert cabinet, provide performance worthy of the most demanding entertainment systems.

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"The M12 monitor loudspeaker delivers outstanding timbral accuracy over a remarkably wide frequency range that belies its diminutive cabinet size. The 6½-inch woofer features a rigid Organic Ceramic Composite (OCC) cone that is coupled to the die-cast frame via a high excursion butyl rubber surround, and includes a flat spider that further aids linearity and reduces distortion. Utilizing an oversized ceramic magnet, the M12 achieves impressive low frequency response all the way down to 41 Hz (-10dB).
The M12’s 1-inch OCC dome tweeter is mated with our proprietary “Constant Acoustic Impedance” waveguide technology, which provides optimized dispersion over a wide listening area and reduces distortion and compression at elevated listening levels. This carefully optimized dispersion precisely matches the 6½-inch woofer, resulting in unprecedented seamlessness and coherency. A powerful, yet compact neodymium motor system maximizes sensitivity, while Ferrofluid magnetic cooling fluid contributes to realistic musical dynamics.
The steep slope, high-order crossover features ultra-tight 3% precision tolerance components, assuring outstanding consistency and matching with the design reference standard. The M12 monitor loudspeaker is magnetically shielded, which allows placement near a CRT monitor in a home theater system. Constructed of thick MDF and internally braced for added rigidity, the M12 cabinet is equipped with threaded inserts on the bottom panel to accommodate screws for secure fastening to the optional pedestal stands. Gold plated binding posts can accept heavy gauge speaker cables and connectors. The M12 is available in your choice of cherry or black cabinet finishes."


6-1/2" Deep-anodized cone woofer

1" Anodized Al-dome tweeter

CAI waveguide

Steep-slope, high-order crossover

Heavily braced MDF enclosure

Optional STANDM12 pedestal stand available


Print Specifications


Concerta Series, 2-Way Bookshelf Loudspeaker

High-frequency Driver Components

1" (2.5 cm) micro-ceramic composite (MCC) cone tweeter

Low-frequency Driver Components

6 ½" (16.5 cm) micro-ceramic composite (MCC) cone woofer

Frequency Response

In-room response: ±1.5dB from 65Hz to 15kHz Low-frequency extension: –10dB @ 41Hz Bandwidth: –6dB @ 48Hz and 45kHz

Recommended Amplifier Power

20 –150 Watts

Nominal Impedance

8 Ohms


87dB SPL, with 2.83V @ 1m (4 pi anechoic)


Black ash (Cherry discontinued as of Oct-2012)


13.8" (35.1 cm)


8.9" (22.6 cm)


11.6" (29.5 cm)


Shipping weight: 19.2 lb (8.7 kg)

Optional Accessories

Optional Floor Pedestal for M12 • Adds 25.4" (64.5 cm) to M12 height • Textured black painted finish