Instruction/ maintenance manual of the product 20 MartinLogan
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™ H elos 20 user ’s manual M a r t i n L o g a n the loudspeaker technology company ® TM.
Contents and Introduction . . . . . . . . . . . . . . . . . . . 2 Contents Introduction P l a c e m e n t .............................. . 3 I n s t a l l a t i o n .............................. 4 P ainting and Customizing . . . . . . . . . . . . . .
Placement 3 P la Cement — Place the Helos 20 at least 12" (30cm) from any wall. — When used as a front channel, place it between 7 to 10 feet ( 21 4 to 315cm) from the primary listen- ing position. — P oint the tweeters towards the pri- mary listening position.
4 Installation NOT E : These instructions must be carefully followed to assure that your Helos 20 is safely installed. Study them thoroughly before installing your Helos 20. NOT E : The following instructions assume the mounting surf ace is of sta ndard woo d fra me a nd s tanda rd sh eet rock construction.
1 Using a stud finder , locate the final speaker position between ceiling joists. WA RNING! A bs o lu t e ly n o p a rt o f t h e t e m pl a te s ho ul d ov er la p a j oi st . 2 Insert a push pin in the template center . 3 Ma rk cu tou t t hr oug h slo ts in t emp lat e.
6 Installation Fi gur e 13. C onn ect in g t he He lo s 2 0 b ri dge d for m ono us e. Fi gur e 14. I nst all at ion s tep 6 –7. 5 T ake care to assign the same color to the (+) terminal on the speaker and the amplifier . Ste re o: Connect two sets of speaker cables from the left and right channels of your amplifier (figure 12).
Installation 7 Fi gur e 16. I nst all at ion s tep 9 . 8 Gently pivot the tweeter stem to point towards the pri - mary li stening pos ition. T o rotate the speaker , rotate the entire speaker assembly . DO NO T rotate the tweeter stem. 9 Gently press the grill cover into place.
8 Customizing and Painting NOT E : The Helos 20 can be either painted in place or removed from the ceiling for painting. IMPORT ANT! Do not paint the rear of the speaker or the surface behind the grill. 1 Remove the grill from the Helos 20 (see figure 17).
F requentl y a sked q uestIons and t roubleshootIng Frequently Asked Questions and Troubleshooting 9 How do I clean my speakers? Just use a dust free cloth or a soft brush to remove the du st from your speakers. W e recommend a specialty cloth (available at the Xtatic shop at www .
10 General Information g eneral I nForma tIon System Frequency R esponse 47–20,000 Hz ± 3 dB Sensitivity 89 dB/2.83 volts/meter (mounted in ceiling) Impedance Mono: 4 ohms Stereo: 8 ohms x 8 ohms C.
Glossary of Audio Terms 11 g lossary oF a udIo t erms AC. Abbreviation for alternating current. Active crossover . Uses active devices (transistors, ICs, tubes) and some form of power supply to operate. Amplitude. The extreme range of a signal. Usually mea- sured from the average to the extreme.
2101 Delaware Street, Lawrence, K ansas 66046, USA tel 785.749.0133 fax 785.749.5320 www .martinlogan.com M a r t i n L o g a n the loudspeaker technology company ©2008 MartinLogan. All rights reserved. Rev . #060408 ® Inductor . A device designed primarily to introduce induc- tance into an electrical circuit.
An important point after buying a device MartinLogan 20 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought MartinLogan 20 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data MartinLogan 20 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, MartinLogan 20 you will learn all the available features of the product, as well as information on its operation. The information that you get MartinLogan 20 will certainly help you make a decision on the purchase.
If you already are a holder of MartinLogan 20, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime MartinLogan 20.
However, one of the most important roles played by the user manual is to help in solving problems with MartinLogan 20. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device MartinLogan 20 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
