Bookshelf Speakers

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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.


Description Concerta Series, 2-Way Bookshelf Loudspeaker
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
Sensitivity (2.83V @ 1m) 87dB SPL, with 2.83V @ 1m (4 pi anechoic)
Nominal Impedance 8 Ohms
High-frequency Drive Components 1" (2.5 cm) micro-ceramic composite (MCC) cone tweeter
Low-frequency Drive Components 6 ½" (16.5 cm) micro-ceramic composite (MCC) cone woofer
Height Dimensions (H x W x D): 13.8" x 8.9" x 11.6" (35.1 cm x 22.6 cm x 29.5 cm)
Weight Shipping weight: 19.2 lb (8.7 kg)
Finishes Black ash (Cherry discontinued as of Oct-2012)
Optional Accessories Optional Floor Pedestal for M12 • Adds 25.4" (64.5 cm) to M12 height • Textured black painted finish


2008 Review, by Andrew Robinson,

2005 "Editor's Choice" Award for Concerta Series Loudspeakers, Sound & Vision

2005 "Product of the Year" Award for Concerta Series Loudspeakers, Electronic House


M12 Owner's Manual
Concerta Brochure




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