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HTD SERIES MULTI CHANNEL HT AMPLIFIER OWNER’S MANUAL
HTD | HTD | HTD8150 6150 4150

WARNING
• TO PREVENT FIRE OR SHOCK HAZARD, DO NOT USE THIS PLUG WITH AN EXTENSION
CORD, RECEPTACLE OR OTHER OUTLET UNLESS THE BLADES CAN BE FULLY INSERTED TO
PREVENT BLADE EXPOSURE.
• TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR
MOISTURE.
• TO PREVENT ELECTRICAL SHOCK, MATCH WIDE BLADE PLUG TO WIDE SLOT, FULLY IN-
SERT.
Thislightingashwitharrowhead
symbol,withinanequilateraltriangle,
isintendedtoalerttheusetothepres-
enceofun-insulateddangerousvoltage
withintheproductsenclosurethatmay
beofsucientmagnitudetoconstitute
ariskofelectricshocktopersons.
Theexclamationpointwithinthe
equilateraltriangleisintendedtoalert
theusertothepresenceofimportant
operatingandmaintenance(servicing)
instructionsintheliterature
accompanyingappliance.
Thislightingashwitharrowhead
symbol,withinanequilateraltriangle,
isintendedtoalerttheusetothepres-
enceofun-insulateddangerousvoltage
withintheproductsenclosurethatmay
beofsucientmagnitudetoconstitute
ariskofelectricshocktopersons.
IMPORTANT SAFTEY INSTRUCTIONS
1.Readtheseinstructions.
2.Keeptheseinstructions.
3Readallwarnings.
4FollowallInstruction.
5.Donotusethisapparatusnearwater.
6.Cleanonlywithdrycloth.
7.Donotblockanyventilationopenings.Installinaccordancewiththemanufacturersinstructions.
8.Donotinstallnearheatsourcessuchasradiators,heatregisters,stoves,orotherapparatus(includingampliers)that
produceheat.
9.Donotdefeatthesafetypurposeofthepolarizedorgroundingtypeplug.Apolarizedplughastwobladeswithone
widerthantheother.Agroundingtypeplughastwobladesandathirdgroundingprong.Iftheprovidedplugsdoesnot
tintoyouroutlet,consultanelectricianforreplacementoftheobsoleteoutlet.
10.Protectthepowercordfrombeingwalkedonorpinchedparticularlyattheplugs,conveniencereceptacles,andat
thepointwheretheyexitformtheappliance.
11.Onlyuseattachmentsoraccessoriesspeciedbythemanufacturer.
12.Unplugtheapparatusduringlightningstormsorwhenunusedforlongperiodsoftime.
13.Referallservicingtoqualiedpersonnel.Servicingisrequiredwhentheapparatushasbeendamagedinanyway,
suchaspowersupplycordorplugisdamaged,liquidhasbeenspilledorobjectshavefallenintotheapparatus,the
apparatushasbeenexposedtorainormoisture,doesnotoperatenormally,orhasbeendropped.
RISK OF ELECTRIC SHOCK
DO NOT OPEN
HTD SERIES MULTI CHANNEL AMPLIFIER OWNER’S MANUAL

Introduction
Congratulationsonbuyingoneofthemostexibleandpowerfulhometheaterormultichannelampsavailable.These
aretheidealampsformountinginconnedspacessuchasracks,credenzas,andcupboards.Theyarealsoidealfor
runningforlongperiodsoftimewithouthavingtoworryaboutover-heating.Theinternalfansareextremelyquiet,only
turningonwhenneeded.EachoftheHTDampliersareconguredinsuchawaythatany,orall,ofthechannelscanbe
bridgedformaximumpowerinto8Ohms.Twoofthechannelscanalsobebridgedandusedasasubwooferampwith
availablecontrolsforcross-overfrequencycontrolandwellasphaseandlevelcontrol.Theampscanalsobecongured
toturnonautomaticallywhena12vsignalisdetectedandturnoagainwhennotdetected.Thisisusefulwhenthe
ampisnoteasilyaccessible,oryouwishtosimplifytheturn-on/oprocedure.FrontpanelLED’sindicatestatusorwarn
ofwiringissues,andagroundisolatingswitchisavailabletohelptroubleshoothumissues.
WelcometotheOSDfamily.
Thermal Protection
AllHTDampliersaredesignedwithspecialcircuitrytosafeguardtheamplierunderathermaloverload
condition.Thermalprotectionmodewillonlyengagewhentheunithasbeenrunathighvolumeforextendedperiods
withoutadequateventilationandwhenspeakerimpedancesarebelowtheminimumlevelsfortheamplier.Inthermal
Inprotectionmode,theamplierwillautomaticallystopoutput.Ifthisfaultoccurs,turnotheamplierandcheckthat
thespeakerimpedanceratingisabovetheminimumrating.Also,checkforadequateventilationaroundtheamplierand
makenecessaryadjustments.Theampliermaybepoweredbackononcetheunithascooledtosafeoperatingtem-
peratures.
Protection Circuitry
SpecialcircuitryhasbeendesignedintotheHTDSeriesMulti-ChannelAmplierstosafeguardunderashort-circuitcondition.
Afaultyspeakercanalsocauseashortcircuitcondition.TheZoneLEDindicatorwillblinkrapidlybetweenredandblue.
If this fault condition occurs, turn o the amplier and check speakers for short circuit conditions when appropriate.
Installation
Note:thedefaultgainforeachchannelissettozerovolume.Pleaseadjustforeachchanneltosetthemaxvolumelevel
foreachzone.Typically,onceyousetityouforgetit.Insteadrelyingonyoursourcedevicetocontrolthemastervolume.
TheHTDSeriesMulti-ChannelAmplierscanbeplacedonashelf,aspartofanequipmentrack,oronatableorcabi-
net.Duringinstallation,keepinmindthattheampliersrequireproperclearancesforventilationandheatdissipation.
Theamplierwilltaketworackspaceswiththefeetremoved.
HTD SERIES MULTI CHANNEL AMPLIFIER OWNER’S MANUAL
Produktspecifikationer
Varumärke: | OSD Audio |
Kategori: | mottagare |
Modell: | HTD4150 |
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