MartinLogan Helos 12 Specifications Page 1

™H e l o s 20 u s e r ’ s m a n u a lM a r t i n L o g a nthe loudspeaker technology company®TM

10 General Informationgeneral InFormatIonSystem Frequency Response47–20,000 Hz ± 3 dBSensitivity89 dB/2.83 volts/meter (mounted in ceiling)Impedan

Glossary of Audio Terms 11glossary oF audIo termsAC. Abbreviation for alternating current. Active crossover. Uses active devices (transistors, ICs

2101 Delaware Street, Lawrence, Kansas 66046, USA tel 785.749.0133 fax 785.749.5320 www.martinlogan.comM a r t i n L o g a nthe loudspeake

Contents and Introduction . . . . . . . . . . . . . . . . . . .2 Contents IntroductionPlacement . . . . . . . . . . . . . . . . . . . . . . . .

Placement 3PlaCement— Place the Helos 20 at least 12" (30cm) from any wall.— When used as a front channel, place it between 7 to 1

4 InstallationNOTE: These instructions must be carefully followed to assure that your Helos 20 is safely installed. Study them thoroughly before i

1 Using a stud finder, locate the final speaker position between ceiling joists.WARNING! Absolutely no part of the template should overlap a joist.2

6 InstallationFigure 13. Connecting the Helos 20 bridged for mono use. Figure 14. Installation step 6–7.5 Take care to assign the same color to t

Installation 7Figure 16. Installation step 9.8 Gently pivot the tweeter stem to point towards the pri-mary listening position. To rotate the spea

8 Customizing and PaintingNOTE: The Helos 20 can be either painted in place or removed from the ceiling for painting.IMPORTANT! Do not paint the r

Frequently asked questIons and troubleshootIngFrequently Asked Questions and Troubleshooting 9How do I clean my speakers?Just use a dust free clot