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TM
™
H e l o s 20
u s e r ’ s m a n u a l
®
Ma rt i n Lo g a n
the loudspeaker technology company
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Contents and IntroduCtIon Contents Introduction Contents and Introduction . . . . . . . . . . . . . .2 . . . . C . ongratulations! You have invested in a new world Contents of high performance audio! Introduction Placement . . . . . . . . . . . . . . . . . . . . . .3 . . . . Th .e . M . ar . tin . Logan Helos 20 represents the culmination of Installation . . . . . . . . . . . . . . . . . . . . .4 . . . .a . n . int . en . si . ve, dedicated group research program directed Painting and
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Pla 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 (214 to 315cm) from the primary listen- ing position. — Point the tweeters towards the pri- mary listening position. Figure 1 . Stereo mode in a 2-channel system. Figure 2 . Stereo mode in a small space. — When using the Helos 20 for dis- tributed audio place the speakers symetrically throughout the room. Figure 3 . Stereo mode reproducing both the left Figure 4 .
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ItI allanst on NOTE: These instructions must be carefully followed to assure that your Helos 20 is safely installed. Study them thoroughly before installing your Helos 20. NOTE: The following instructions assume the mounting surface is of standard wood frame and standard sheet rock construction. If you wish to mount the Helos 20 to another type of material, you should consult a bonded contractor. Warning! Before installing check local building codes to verify com- pliance with local regula
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Figure 10 . Installation steps 1–3. Figure 11 . Installation step 4. 1 Using a stud finder, locate the final speaker position 4 Use a dry wall knife/saw to cut out the opening. between ceiling joists. WARNING! Absolutely no part of the template should overlap a joist. 2 Insert a push pin in the template center. 3 Mark cutout through slots in template. Remove Template. Installation Ceiling Joist Ceiling Joist
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Figure 12 . Connecting the Helos 20 for stereo use. Figure 13 . Connecting the Helos 20 bridged for mono use. Figure 14 . Installation step 6–7. 5 Take care to assign the same color to the (+) terminal 6 Place speaker in hole. on the speaker and the amplifier. 7 Use a 2-inch long #2 Phillips driver and an electric Stereo: Connect two sets of speaker cables from the drill to lock all 3 mounting locks in place. Use a low left and right channels of your amplifier (figure 12). clutch setting on t
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Figure 15 . Installation step 8. Figure 16 . Installation step 9. 8 Gently pivot the tweeter stem to point towards the pri- 9 Gently press the grill cover into place. mary listening position. To rotate the speaker, rotate the entire speaker assembly. DO NOT rotate the tweeter stem. Installation
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CustomIzIng and PaIntIng Painting the Speaker Frame Painting the Speaker Grill Figure 17 . Painting the speaker frame. Figure 18 . Painting the speaker grill. NOTE: The Helos 20 can be either painted in place or IMPORTANT! The grill must be removed from the speaker removed from the ceiling for painting. before painting. IMPORTANT! Do not paint the rear of the speaker or the IMPORTANT! The scrim must be removed before painting surface behind the grill. the grill. 1 Remove the grill from the Hel
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Fyrequentl a sked q uestIons and t roubleshootIng Frequently Asked Questions Troubleshooting How do I clean my speakers? Output Just use a dust free cloth or a soft brush to remove the • Check that all your system components are turned on. dust from your speakers. We recommend a specialty • Check your speaker wires and connections. cloth (available at the Xtatic shop at www.martinlogan. • Check all interconnecting cables. com) that cleans your speakers better than anything else we have tried. D
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g eneral InFtI orma on Specifications Warranty and Registration System Frequency Response Your Helos 20 speaker is provided with an automatic Limited 47–20,000 Hz ± 3 dB 90 Day Warranty coverage. Sensitivity You have the option, at no additional charge, to receive a 89 dB/2.83 volts/meter (mounted in ceiling) Limited 5 Year Warranty coverage. To obtain the Limited 5 Year Warranty coverage you need to complete and return Impedance the Certificate of Registration, included with your speakers,
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g lossary oF a udIo t erms AC . Abbreviation for alternating current. Diffraction . The breaking up of a sound wave caused by some type of mechanical interference such as a cabinet Active crossover . Uses active devices (transistors, ICs, edge, grill frame or other similar object. tubes) and some form of power supply to operate. Diaphragm . A thin flexible membrane or cone that vibrates Amplitude . The extreme range of a signal. Usually mea- in response to electrical signals to produce sou
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Inductor . A device designed primarily to introduce induc- Resonance . The effect produced when the natural vibra- tance into an electrical circuit. Sometimes called a choke tion frequency of a body is greatly amplified by reinforcing or coil. vibrations at the same or nearly the same frequency from another body. Linearity . The extent to which any signal handling process is accomplished without amplitude distortion. Sensitivity . The volume of sound delivered for a given electrical input
