Sound Judgment

The innovative approach of MartinLogan ESL design delivers fully dispersed quality sound with a maximum of bass pressurization and freedom from blurred imaging.

The simple, sculptured lines of the cabinet are the first thing you notice. It's not, however, until you listen to the unforgettable purity of sound that your can truly appreciate why the MartinLogan Monolith loudspeaker has become a classic, and why it remains one. The Monolith is the result of MartinLogan's early breakthrough thinking in electrostatic technology. The clarity of its sound bathes the entire listening area with all the exquisite truth and beauty of live performance. When you listen, it's easy to understand why our loudspeakers are not priced for everyone. We built them to be the finest in the world. Sound judgment will tell you that this is what you deserve.

Launched in 1983

Price when discontinued:



Specifications are subject to change without notice

Frequency Response

28–24,000 Hz +2db,-3dB

Recommended Amplifier Power

20‒500 watts per channel

Horizontal Dispersion


Vertical Dispersion

48" (121.92cm) line source


90 dB watt/meter

Crossover Frequency

100 Hz centre. 6dB per octave, phase coherent.

High Frequency Transducer

48" (121.92cm) CLS™ electrostatic transducer

Low Frequency Transducer

12" (30.5) high-excursion, super light, high-rigidity cone with extended thow drive assembly. Electrically tapered, contoured to offset magnetic nonlinearities. Correct blending between ESL and dynamic subwoofer occurs without complex servo-control requirements.


100% oxygen free copper coils. Polypropylene bypass capacitors.


5-way binding posts


165 lbs. (74.9 kg)


72" × 25" × 13"
(182.9cm × 63.5cm × 33cm)

Customer Reviews For Monolith

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  • Friday, November 6, 2009

As a young man, still in high school, I had the oportunity to stop by "That audio shop" in Lawrence one day in The early Eighties. I was graciously invited to audition an original pair of Monolith's. Even though it was obvious I could not afford to purchase them,I was treated with respect due someone beyond my years, and means. Thank you! My love for audio perfection was concieved on that day. I was blown away by the imaging, and clarity of these massive transducers. As I walked around the audition room, I truely felt that I was walking about the stage, as the musicians performed. Nowhere was the "beaminess" that so many have described. I believe you must take the time in setup and installation, to achieve the value that you have so dearly paid for. You will not be disappointed if you follow through beyond signing the check! I am a simple man, and due to our recent economic woes, I still do not have the luxury of Martin Logan. However, I am a trained audio engineer, and my opinions should not be simply dismissed. Audition this product, and it's many offspring, and you are sure to be superbly astounded! Many thanks, for the respect, and mostly for the experience!