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MartinLogan 20 manual

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Table of contents for the manual

  • Page 1

    ™ H elos 20 user ’s manual M a r t i n L o g a n the loudspeaker technology company ® TM[...]

  • Page 2

    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 . . . . . . . . . . . . . . . . . . . 8 P ainting the Speaker F rame P ainting the Speaker Grill Removing the Logo Badge F re [...]

  • Page 3

    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. — When using the Helos 20 for dis - tributed audio place the speakers symet[...]

  • Page 4

    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. If you wis h to mount t he Helos 20 to an[...]

  • Page 5

    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. R em ove T em pla te . 4 Use a dry wall knife/saw to cut out the opening. Fi [...]

  • Page 6

    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). Mon o: Conne ct o[...]

  • Page 7

    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. Fi gur e 15. I nst all at ion s tep 8 .[...]

  • Page 8

    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). 2 P ress the paint shield into place (see figure 17). 3 In a well ventilated area paint the H[...]

  • Page 9

    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 .martinlogan. com) that cleans your speakers better than anything els[...]

  • Page 10

    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 Crossover Frequency 2600 Hz Components Custom air core coils, polyester capacitors Binding P osts T wo sets push style binding posts, accommodates wire[...]

  • Page 11

    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. A r c . T h e v i s i b l e s p a r k s g e n e r a t[...]

  • Page 12

    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. Sometimes called a choke or coil. Li[...]