Helos 100 front view.

Helos 100 is ideal for any room requiring ultimate in-ceiling audio performance such as a 2-channel system in a large living room or a multi-channel system in a discrete home theater. Helos 100's aimable assembly allows a large audience to experience the full potential of the Helos 100.

The Helos 100 delivers legendary MartinLogan quality and performance in a compact, high-resolution in-ceiling loudspeaker. Featuring a 1-inch neodymium soft dome tweeter, high-rigidity aluminum cone woofer, and proprietary Vojtko crossover topology, Helos 100 effortlessly provides solid imaging with extreme sonic accuracy. An acoustic contour switch tailors dispersion assuring a top-notch performance in any installation.

Helos 100 tweeter and woofer detail.

Designed to Aim at the Listening Position

Helos 100 features a high-resolution neodymium tweeter mounted on a rigid angled tweeter stem and an aluminum cone woofer mounted at an angle. Orientating the tweeter stem towards the primary listening location allows the audience to enjoy the highest levels of in-ceiling audio performance, while still providing rich, detailed sound throughout the entire room. To aim the Helos 100, simply turn the entire speaker assembly so the tweeter points at the primary listening location.

High-Resolution 8-Inch Aluminum-Cone Woofer

Utilizing a high-excursion, high-resolution state-of-the-art woofer specially designed for accurate in-wall bass performance, the Helos 100 delivers a precise low-end with accuracy, authority and extension uncommon to traditional in-ceiling loudspeakers.

Precision-Built Advanced-Technology Vojtko™ Crossover

Carefully hand-built using only the finest polyester capacitors and air-core coils, the crossover employ's MartinLogan's proprietary Vojtko topology for vanishingly low distortion and seamless driver integration. This precision-tuned network preserves even the most microscopic sonic nuances while handling the full dynamics of any source.

Acoustic Contour Switch Fine Tunes Dispersion

A unique acoustic contour switch tailors high-frequency performance to provide either spot or wide dispersion, assuring a top-notch performance in any installation.

Helos 100 rear view.

Quick, No-Hassle Installation

A robust mounting-lock system allows quick, trouble-free installation. When not in use, the constant-control, die-cast mounting locks are held securely within a self-contained housing. When moved into place during installation, they couple the speaker's chassis firmly to the ceiling. And if the speaker is ever removed, the locks retract and latch themselves back in their housings.

Each Helos 100 speaker comes with a full-size installation template that features quick-reference instructions, and die-cut guides for marking the cutout hole.

Paintable Frame and Grill Cover

A paintable frame and grill endows the Helos 100 with the flexibility to complement any décor.

Application Versatility

Helos 100 is ideal for any room requiring ultimate in-ceiling audio performance such as a 2-channel system in a large living room or a multi-channel system in a discrete home theater.

Exceptional Sound from Any Location!

1a. ONE at the front of a room for a 5.1 or 7.1 center channel.


1b. TWO at the front of a room for stereo sound or 5.1 or 7.1 left/right front channels.


1c.TWO at the rear of a room for 5.1 left/right rear channels.

d. TWO at the side of a room for 7.1 left/right side surround channels.

Helos 10, Helos 100, and Helos 20.