In-Ceiling Loudspeaker: The MartinLogan Helos 12 is a
high-resolution in-ceiling loudspeaker featuring a 1" neodymium soft-dome
tweeter mounted in a pivoting stem, aluminum cone woofer, and proprietary
Vojtko crossover topology. This in-ceiling speaker blends seamlessly into any home thanks to it's
low profile, micro-perforated grille with no visible bezel.
Pivoting Tweeter: The MartinLogan in-ceiling speaker features a
high-resolution neodymium tweeter mounted on a pivoting tweeter stem that easily
aims at the primary listening location. This design allows the audience to enjoy
the highest levels of in-ceiling audio performance, while still providing rich,
detailed sound throughout the entire room.
Aluminum Cone Woofer: The MartinLogan in-ceiling speaker
employs a 6.5" aluminum cone woofer with a rubber surround and cast
aluminum basket for detailed midrange and powerful midbass extension.
Precision 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.
Spring-Post Connectors: The MartinLogan Helos 12
features two spring-post connectors to attach your speaker wire. The
spring-posts will accept bare wire (16- to 12-gauge) and pin-connectors.
Robust Mounting Locks: A robust mounting-lock system allows quick,
trouble-free installation. When not in use, the constant-control 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
Low Profile Grille: The MartinLogan Helos 12 features a low
profile, paintable micro-perforated grille with no visible bezel for a near
invisible integration into any ceiling. A magnetic system secures the grille easily
into place, reducing the risk of warping or damage during installation.
Applications & Placement: The Helos 12 is suitable for almost any application in small rooms. Ideal for use in a multi-channel home theater as a surround speaker, in a kitchen as 2-channel stereo speaker, or in a hallway as part of a distributed audio system. This MartinLogan
in-ceiling speaker offers superb imaging and flexible placement in nearly any
location. However, for best performance and imaging place speakers equidistant
from one another and avoid physical obstructions between the speaker and primary
Installation Dimensions: The in-ceiling speaker has an overall
measurement of 9.5" in diameter x 4.625" deep. It requires a cut-out of 8.375"
in diameter and a mounting depth of 4.4375" behind the ceiling surface. The speaker
only protrudes 0.25" from the ceiling.
Break-in Period: Allow approximately 72 hours of break-in at
90 dB (moderate listening levels) before any critical listening.
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