Helos 20

High-Performance Stereo Sound From a Single In-Ceiling Speaker

Lifelike imaging from a very compact, high-performance, in-ceiling speaker designed for stereo or mono use.

Helos 20 delivers stereo sound from a single speaker, ideal for use in small rooms such as bathrooms, small offices, entryways, and kitchens. Helos 20 also bridges to deliver mono sound reproduction with wide dispersion. Delivering legendary MartinLogan quality and performance in a compact, high-resolution in-ceiling loudspeaker. Featuring dual 0.75-inch neodymium soft dome tweeters, a high-rigidity aluminum cone woofer, and proprietary Vojtko crossover topology, Helos 20 effortlessly provides solid imaging with extreme sonic accuracy.

Launched in 2008

Price when discontinued:
$399.00 each

Press For Helos 20

Helos 20 Specifications

Specifications are subject to change without notice

Frequency Response

47–20,000 Hz ±3dB

High Frequency Transducer

Two 0.75" (1.9 cm) neodymium soft-dome tweeters

Aiming

Pivoting Tweeter Stem

Low Frequency Transducer

6.5" (16.5 cm) cast basket, high rigidity aluminum cones with extended throw drive assembly, thermal protection

Sensitivity

89 dB/2.83 volts/meter

Impedance

Mono: 4 Ohms. Stereo: 8 Ohms × 8 Ohms Compatible with 4, 6, or 8 Ohm rated amplifiers.

Recommended Amplifier Power

20—200 watts per channel

Recommended Amplifier Power (Stereo)

20 watts × 20 watts ‒ 100 watts × 100 watts

Crossover Frequency

2600 Hz

Components

Air core coils, polyester capacitors

Inputs

Stereo binding posts (bridge for mono)

Weight

4.5 lbs. (2 kg)

Required Wall Opening (includes tolerance)

8.35" x 8.35 "
(21.2 cm x 21.2 cm)

Projection From Wall Surface

0.37" (1cm)

Depth Behind Wall Surface

5" (12.7 cm)

Customer Reviews For Helos 20

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Derek

  • Thursday, February 25, 2010

Helos Better than expected
I bought 5 of the Helo 20s online for a pretty good price, I have used another top of the line brand for the speakers in my other room but after installing these for the first time I was very impressed and surprised at how crisp and clean the sound was from them as well as the much better improvement from the speakers that I have in the other room.. thanks a lot

Jitendra K.

  • Thursday, January 21, 2010

Very nice sound quality with good bass with moderate price
Initially I plan to buy bose 191 speakers but I saw Helos 20 has 80% of the price on amazon on X'mas day so i rush to local magnolia center of Bestbuy to listen the sound quality but i was unlucky b'cos they don't have setup for helos 20, so i was little upset and was confused too b'cos i dont know what to do but suddenly what happen to me that i placed order on amazon for 10 In-ceiling Helos 20 speaker. After placing order went to martinlogan website to check for authorized dealer and found fry's so rush to their place and listen the sound quality which was way better than bose and better bass compare to bose 191 in-ceiling speaker. I took an deep breath thinking that all my investment and decision is worth selecting helos 20. On Jan 6 2010, all of my speakers and onkyo HT-RC180 arrived and it took me one week to put 6 speaker into ceiling and guest what on friday night after everything was ready and configured with onkyo receiver, I just turn on the FM and boom......great sound quality and enjoy blu-ray movies with THX, Dolby, etc sound with my onkyo receiver. Now i'm adding two more helos 20 speaker for sourrond back left/right and also planning to buy center channel and sub-woofer speaker from Marting logan itself. Finally, I would definitely recommend to buy this speaker but before that listen and decide because everybody has their own view and ear too. All the best for your shopping.....!!!!