Sema Zen Loudspeaker

Sema Zen Loudspeaker

Our best!… Representing nearly half a century of relentless pursuit and passionate desire to create utterly musical loudspeakers. Sema-Zen sounds powerful, effortless, delicately refined and very coherent all at once.

Extensive listening sessions with diverse variety of music reveals that Sema-Zen is unusually transparent, projects well defined spacious soundstage images with engaging musicality even with a just few good watts.


Sensitivity 93 dB
Impedance 8 Ohms
Frequency Response 27Hz to 40KHz
Power Handling 200 Watts RMS
Phase Coherent


Height 67″ (168 cm)
Width 13.3″ (34 cm)
Depth 29″ (73 cm)
Weight 220 lbs (100 kg) each


Two specifically designed and hand built (in our own facilities) 8 1/4” hyper exponentially shaped woven carbon full range drivers are meticulously pair matched. Main drivers cover a wide range of the music and are directly coupled to amplifiers to minimize interruptions and alterations to the musical signal flow.

Each driver is housed individually in precisely sized non-resonant semi-spherical bamboo resin enclosures. Dense front baffle supporting the main drivers is acoustically isolated from the main cabinet to reduce cabinet resonance noise dramatically.

Beryllium dome tweeter, mounted in an acoustic wave guide is perfectly aligned between the main drivers and is also acoustically isolated from the main driver baffle for more stable sound propagation.

Several perforated braces are angled and installed internally across the cabinets at critical points to reduce cabinet wall vibrations and to diffuse long vertical standing waves. A long and formed spine brace (separate from the cross braces) is installed a-symmetrically for the entire length of the cabinet to brace the rear, front, top and base panels of the cabinet and support the rear sides of bass drivers. All inner cabinet corners are filled with gussets to further ‘densify’ the cabinet structure as well as reducing corner nodes.

Four well matched bass drivers mounted in a line array (below) are mechanically grounded to the vertical spine brace to stabilize the drivers’ operation and drain potentially harmful mechanical vibrations.

A simple high pass filter (one high quality capacitor) is utilized to protect the beryllium dome tweeter from low frequencies. A simple low pass filter (one high quality coil) is used to gently roll off high frequencies from the woofers.

Solid metal stabilizer pods with large adjustable brass coupling spikes are mounted to support the cabinet.

Patented Surreal Acoustic Lenses are used to reduce noise caused by air turbulence in cone drivers. Patented Magnetic Conduction Wave Guides in bi-wire configuration are used for faster and more dynamic signal transfer.