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		 HGS-15XTHXUltra2   
					Owner'sManual   
					HighGainServo-Controlled   
					Audio/Video Subwoofer System   
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				IMPORTANTES CONSIGNES DE SECURITE   
					ATTENTION   
					Risque d’électrocution   
					Ne pas ouvrir   
					Attention: Afin d’éviter tout risque d’électrocution, ne pas enlever le boitier (ou partie arrière de l’enceinte).   
					Aucune pièce ne doit être manipulée par l’utilisateur. Pour tout entretien, vous référer à un   
					personnel de service qualifié.   
					Le symbol de l’éclair avec la flèche sert à avertir l’utilisateur de la présence d’un “voltage dangereux” non isolé   
					dans l’enceinte du produit d’une magnitude pouvant constituer un risque   
					d’électrocution de personnes.   
					Le symbol du point d’exclamation sert à avertir l’utilisateur que d’importants conseils de fonctionnement et de   
					maintenance (entretien) sont fournis avec l’enceinte d’extrêmes graves.   
					1.   
					2.   
					3.   
					Lire le mode d’emploi - Tous les conseils de sécurité et de fonctionnement doivent être lus avant de   
					mettre en marche l’enceinte.   
					Garder le mode d’emploi - Il est conseillé de conserver les conseils de sécurité et de fonctionnement   
					pour un éventuel usage futur.   
					Avertissements - Il est important de se conformer à tous les conseils de fonctionnement concernant   
					l’enceinte et à toutes les instructions inscrites sur l’enceinte.   
					4.   
					5.   
					Suivre les conseils - Tous les conseils d’utilisation et de fonctionnement doivent être suivis à la règle.   
					Eau et humidité - Ne pas utiliser l’enceinte près d’une source d’eau - par exemple, près de la baignoire,   
					d’une bassine de lavage, d’un évier de cuisine, d’un bac à lavage, dans un sous-seul mouillé, près d’une   
					piscine…   
					6.   
					7.   
					Pieds et Supports - N’utiliser que des pieds et supports recommandés par le fabricant.   
					Assemblage mural ou au plafond - Se conformer uniquement aux instructions du fabricant pour fixer   
					l’enceinte sur un mur ou sur un plafond.   
					8.   
					Ventilation - Il est important de placer l’enceinte de telle sorte qu’elle ne gêne pas sa propre ventilation. Par   
					exemple, ne pas placer l’enceinte sur un lit, un canapé, sur la moquette, ou sur toute surface similaire qui   
					bloque les ouvertures de ventilation ; ne pas poser l’enceinte dans une meuble encastré ou fermé telle   
					qu’une bibliothèque ou un meuble qui empêche l’air de circuler par les ouvertures de ventilation de   
					l’enceinte.   
					9.   
					Chaleur - Placer l’enceinte loin de toute source de chaleur tels que radiateurs, compteurs thermiques, fours   
					ou autres enceintes dégageant de la chaleur.   
					10. Sources d’électricité - Ne brancher l’enceinte que dans une prise du type décrit dans le mode d’emploi ou   
					comme indiqué par le fabricant.   
					11. Protection du cordon électrique - Les cordons électriques doivent être fixés pour éviter que toute personne   
					ne marche dessus et que rien ne puisse être placé sur ou contre eux - faire tout particulièrement attention   
					aux cordons branchés dans des prises électriques, à des réceptacles et à leurs points de sorties de   
					l’enceinte.   
					12. ”Attention : Afin d’éviter tout choc électrique, introduire la lame la plus large de la fiche dans la borne   
					correspondante de la prise et pousser jusqu’au fond”.   
					13. Nettoyage - Pour le nettoyage de l’enceinte, suivre scrupuleusement les instructions du fabricant.   
					14. Périodes de non-utilisation - Le cordon électrique de l’enceinte doit rester débranché si l’enceinte reste   
					inutilisée pendant une longue période de temps.   
					15. Infiltration d’objet ou de liquide - Faire attention à ce qu’aucun objet ne tombe et à ce qu’aucun liquide ne   
					soit versé sur l’enceinte.   
					16. Dommages nécessitant réparation - L’enceinte ne doit être réparée que par du personnel qualifié lorsque :   
					a.   
					b.   
					c.   
					d.   
					e.   
					le cordon électrique ou la prise ont été endommagés.   
					Des objets sont tombés ou du liquide a été versé sur l’enceinte.   
					L’enceinte a été exposée à la pluie.   
					L’enceinte ne semble pas fonctionner normalement ou indique un changement de performance.   
					L’enceinte est tombée par terre ou a été endommagée.   
					17. Entretien - L’utilisateur ne doit pas tenter de réparer l’enceinte au-delà de ce qui est décrit dans le mode   
					d’emploi.   
					18. Surcharge - Ne pas surcharger les prises murales, les rallonges, ou les prises femelles encastrées de   
					commodité. On risquerait un incendie ou un choc électrique.   
					19. Pièces de rechange - Lorsque le remplacement d’une pièce s’avère nécessaire, s’assurer que le technicien   
					utilise la pièce spécifiée par le fabriquant, ou une pièce possédant les mêmes caractéristiques que la pièce   
					d’origine. Les substitutions non autorisées peuvent provoquer des incendies ou des chocs électriques, ou   
					présenter d’autres dangers.   
					20. Contrôle de sécurité - Après toute intervention technique sur ce produit (neuf ou réparé), demander au   
					technicien de procéder à un contrôle de sécurité pour vérifier qu’il est en bon état de marche.   
					Toute autre réparation doit être référée à du personnel qualifié.   
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				WICHTIGESICHERHEITSHINWEISE   
					VORSICHT   
					GEFÄHRLICHE SPANNUNG   
					NICHT ÖFFNEN   
					Vorsicht: Zur Vermeidung von Gefahr durch elektrischen Schlag, Deckel (oder Rückwand) nicht   
					abnehmen. Produkt enthält keine Anwenderteile. Reparatur und Wartung nur von qualifiziertem   
					Fachpersonal vornehmen lassen.   
					Das Blitzsymbol dient als Hinweis auf unisolierte „gefährliche Spannungen“ innerhalb des Gehäuses,   
					deren Werte eine Berührungsgefahr für den Menschen darstellen können.   
					Das Symbol mit dem Ausrufungszeichen dient als Hinweis auf wichtige, in den Unterlagen des   
					Subwoofers enthaltene Bedienungs- und Wartungsvorschriften.   
					1.   
					Anleitungen lesen - Alle Sicherheits- und Bedienungsanleitungen vor Inbetriebnahme des Subwoofers   
					aufmerksam durchlesen.   
					2.   
					Anleitungen aufbewahren - Die Sicherheits- und Bedienungsanleitungen zur späteren Bezugnahme   
					aufbewahren.   
					3.   
					4.   
					5.   
					Warnungen beachten - Alle Warnungen am Subwoofer und in der Bedienungsanleitung unbedingt beachten.   
					Anleitungen befolgen - Alle Bedienungs- und Gebrauchsanleitungen genau befolgen.   
					Wasser und Feuchtigkeit - Subwoofer nicht in der Nähe von Wasser aufstellen, d.h. neben einer Badewanne,   
					Spüle, Waschmaschine, in einem feuchten Keller, in der Nähe des Swimmingpools o.ä..   
					Rollwagen und Ständer - Subwoofer nur mit einem vom Hersteller empfohlenen Rollwagen oder Ständer   
					benutzen.   
					Wand- oder Deckenbefestigung - Subwoofer nur den Herstellerempfehlungen gemäß an der Wand oder   
					Decke befestigen.   
					Belüftung - Subwoofer so aufstellen, daß die erforderliche Belüftung nicht behindert wird. D.h., Subwoofer   
					nicht auf einer weichen Oberfläche wie einem Bett, Sofa, Teppich o.ä. aufstellen, die die Belüftungsöffnungen   
					blockieren kann. Subwoofer gleichfalls nicht in einem Regal oder Schrank unterbringen, worin die Luftzufuhr   
					behindert wird.   
					6.   
					7.   
					8.   
					9.   
					Wärme - Subwoofer nicht in der Nähe von Wärmequellen, wie Heizkörpern, Wärmespeichern, Öfen oder   
					anderen wärmeerzeugenden Subwoofern aufstellen.   
					10. Netzanschluß - Subwoofer nur an eine der in der Bedienungsanleitung beschriebenen oder auf dem   
					Subwoofer angegebenen Stromquellen anschließen.   
					11. Netzkabelschutz - Netzkabel so verlegen, daß nicht daraufgetreten wird oder sie durch darauf-oder   
					dagegengestellte Gegenstände eingeklemmt werden können. Die Anschlußstellen des Netzkabels an   
					Steckdosen und am Subwoofer dabei besonders beachten.   
					12. „Vorsicht“: Zur Vermeidung von Gefahr durch elektrischen Schlag sicherstellen, daß der Schutzkontakt   
					des Steckers vollständig in die Steckdose eingeführt ist.   
					13. Reinigung - Subwoofer nur den Herstellerempfehlungen gemäß reinigen.   
					14. Betriebsfreie Zeiträume - Netzkabel des Subwoofers aus der Steckdose ziehen, wenn er über einen längeren   
					Zeitraum nicht benutzt wird.   
					15. Beschädigungen durch Gegenstände oder Flüssigkeiten - Es ist darauf zu achten, daß keine Gegenstände auf   
					das Gehäuse fallen oder Flüssigkeiten darauf verschüttet werden.   
					16. Beschädigungen, die eine Reparatur erforderlich machen - Subwoofer sollte von qualifiziertem Fachpersonal   
					repariert werden, wenn:   
					a.   
					b.   
					c.   
					d.   
					e.   
					Das Netzkabel oder der Stecker beschädigt sind.   
					Gegenstände oder Flüssigkeiten in den Subwoofer gelangt sind.   
					Der Subwoofer dem Regen ausgesetzt wurde.   
					Der Betrieb des Subwoofers gestört ist oder seine Leistung deutlich nachgelassen hat.   
					Der Subwoofer fallengelassen oder beschädigt wurde.   
					17. Reparatur und Wartung - Durch den Benutzer auszuführende Wartungsmaßnahmen des Subwoofers sind auf   
					die in der Bedienungsanleitung angegebenen Prozeduren beschränkt.   
					18. Überlastung - Zur Vermeidung von Brandgefahr und elektrischem Schlag Wandsteckdosen,   
					Verlängerungskabel bzw. eingebaute Steckdosen nicht überlasten.   
					19. Ersatzteile - Wenn Ersatzteile benötigt werden, sicherstellen, daß der Servicetechniker entweder die   
					vom Hersteller angegebenen Ersatzteile benutzt oder Teile, die den Originalteilen entsprechende   
					Kennwerte besitzen. Die Verwendung von Ersatzteilen, die nicht zugelassen sind, kann Brände,   
					elektrischen Schlag oder andere Gefahren verursachen.   
					20. Sicherheitsprüfung - Nach Beendigung von Wartungs- oder Reparaturmaßnahmen an diesem Produkt   
					vom Servicetechniker Sicherheitsprüfungen zum Nachweis des ordnungsgemäßen Betriebszustandes   
					vornehmen lassen.   
					Alle anderweitigen Servicemaßnahmen von qualifiziertem Wartungspersonal durchführen lassen.   
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				Congratulations!   
					CongratulationsonyourpurchaseofaVelodynesubwoofersystem.This   
					systemrepresentstheabsolutestateoftheartinaccuratelowfrequency   
					reproduction.Webelievethistobethefinestsubwooferavailableanywhere!   
					In this new subwoofer, we have combined our radical new driver and   
					amplifierdesignstoobtainourtraditionallyaccuratesoundwhileincreasing   
					efficiencyandoutputtonewstandards.Thisexceptionalsubwooferwill   
					provideyouwithyearsofunparalleledlisteningpleasure.Enjoy!   
					Caution!   
					Pleaseobservethefollowinginstructionstoinsuresafeandpropersystem   
					operation.   
					Note: Do not move unit while turned on or plugged in!!! Do not   
					leaveunitindirectsunlightoruseinhighhumidityenvironments!!!   
					Warning!   
					Topreventfireorshockhazard,donotexposethisequipmenttorainor   
					moisture.Toavoidelectricalshock,donotopenspeakerenclosureoramp   
					chassiscover.Pleaseobserveallwarningsontheequipmentitself.There   
					arenouserserviceablepartsinside.Pleasereferallservicequestionsto   
					yourauthorizedVelodynedealer.   
					Priortoinstallation   
					Pleaseunpackthesystemcarefully!Thisunitisextremelyheavy. Use   
					cautionwhenliftingofmovingtoavoidinjury.Removeallstaplesusedto   
					sealthecartonastheycanscratchthecabinet.Pleasesavethecartonand   
					allpackagingmaterialsforfutureuse.Packingthisunitinanyothercarton   
					may result in severe damage when shipping. Please take a moment to   
					record the serial number and date/location of purchase in the space   
					providedonthewarrantycardforfuturereference.   
					continued. . .   
					☞ 
					1 
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				Product Features and Controls   
					• 15"(12.7"pistondiameter)subwooferwithtandem3"voicecoilsand   
					220oz.magnet   
					• Built-in1250watt(RMS)highefficiencyclassDamplifier   
					• Accelerometerbasedservocontrolsystemforextremeaccuracy   
					• Adjustable(40to120Hz)low-passcrossover(defeatable)   
					• Selectable(80or100Hz)high-passcrossoveroutputs   
					• Balanced(XLR)inputs   
					• Line-level(RCA)inputs&outputs   
					• Speaker-levelinputsandoutputswith5waybindingpostconnections   
					• Signalsensingautoturnon/off(defeatable)   
					• Variablevolumecontrol   
					• Selectablephasecontrol(0 or180°)   
					° 
					• Selectablesubsonicfilter(15Hzor35Hz)   
					• Frequencyresponseof18-120Hz   
					• Detachablepowercord   
					• Magneticallyshieldedforvideouse   
					• Multiplestaggeredlow-passcrossovers;12dB/octaveinitial,   
					48dB/octaveultimate   
					• Gaincompressioncircuitpreventsoverexcursionandampclipping   
					• Externalremoteconnectorforcustominstallation   
					• Poweron   
					• Multi-layerresinlaminatecone   
					• High-excursionrubbersurround   
					☞ 
					2 
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				Installation   
					YournewVelodyneservosubwooferprovidesforanumberofinstallation   
					options.Readalltheinstallationinformationbelowinordertodetermine   
					whichinstallationoptionisbestforyoursystem.Remembertoperform   
					all installation procedures with system power turned off!!!   
					Inputs   
					Yournewsubwooferisequippedwithspeaker-level,line-levelandbalanced(XLR)   
					inputs.UsetheLINELEVELjackswhenconnectingyoursubwoofertoapre-amp,   
					signalprocessor,line-levelcrossover,orreceiverwithpre-ampleveloutputs.The   
					SPEAKERLEVELjacksconnectdirectlytothespeakeroutputsofanyamplifier,   
					integratedamplifierorreceiver.Youramplifiersectionwillnoticenoadditional   
					loadingeffectswhenyouusetheseinputsduetotheirveryhighimpedance.   
					Important!!!   
					DonotusebothLINELEVELandSPEAKERLEVELconnectionssimultaneously!   
					Volumecontrol   
					This control allows you to balance the output from the subwoofer to the main   
					speakers/amplifierinyoursystem.Thiscontrolshouldbesettoachievesimilar   
					outputlevelfromboththemainspeakersandsubwooferwhenlisteningtomusic.   
					Theremotemaythenbeusedforminute/temporaryadjustments,suchasincreasing   
					thevolumeforhometheaterusage.   
					Low-passcrossover-40to120Hz   
					Allinputssumtheleftandrightchannelstogether,withtheresultingsignalpassing   
					throughanadjustablelow-passcrossoverbeforebeingamplified.Thecrossover   
					controlallowsyoutoadjusttheupperlimitofthesubwoofer'sfrequencyresponse   
					from 40 to 120Hz. The subwoofer's response will begin rolling off above the   
					frequencyyousetthiscontrolto.Youshouldsetthecrossoverfrequencytoobtain   
					asmoothandseamlesstransitionfromthesubwoofertothemainspeakersinyour   
					system.Ifyourmainspeakersaresmallerunitswithlimitedlowfrequencyoutput,   
					youmaywishtochooseahigherfrequency(suchas100-120Hz)thanyouwould   
					withlargerspeakerswhichhavegreaterlowfrequencyoutput.Withlargerspeakers,   
					youmightstartwiththiscontrolsetlower,suchas80Hz.   
					continued. . .   
					☞ 
					3 
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				Abypassswitchisalsoprovidedifyouwishtouseanexternalcrossover.   
					If you are not using an external crossover, we recommend that you   
					use the one provided within the unit for optimum performance!   
					Phaseadjustment-0°/180°   
					Thiscontrolallowsyouthe"reverse"thephaseofthesubwoofer'soutputsignal   
					180°tocorrectforanypossiblemismatchandresultingcancellationbetweenthe   
					subwooferandyourmainspeakers/amplifier.Toadjust,simplylistentothesystem   
					withmusicplaying.Thenmovetheswitchfromonepositiontotheotherandlisten   
					forachangeinlowfrequencyoutput.Thecorrectpositionwillhaveagreateramount   
					ofapparentlowfrequencyoutput.   
					Subsonic-15Hz(THX)/35Hz   
					Thisadjustmentaltersthelowfrequencylimitofthesubwoofer.Formostsystems   
					we recommend the 15Hz setting which will allow the subwoofer to deliver the   
					maximumlowbassoutputitwasdesignedfor.Incertainmovietheaterinstallations   
					whichsuggestthattheextremelowbassbelimited,movetheswitchpositionto35Hz   
					andtheresponsewillbeattenuatedbelowthisfrequency.   
					Crossoverswitch-In/Out(THX)   
					Thisswitchallowstheelectroniccrossovercircuitrytoberemovedfromthe   
					signalpath.Thisisrequiredincertaininstallationswhichroutethesignal   
					throughexternalprocessorswithacrossovercircuitoftheirown,suchas   
					thenewdigitalunits.SimplymovetheswitchtoOUTtodisengagethebuilt   
					in crossover. For all other installations which do not have a separate   
					electroniccrossoverwerecommendyouleavetheinternalcrossoverIN   
					toprovideoptimumperformance.   
					Autoturnonfunction   
					Withthisfunctioninthe"auto"position,yoursubwoofer canbesafelyleft   
					withthemainpowerswitchoncontinuously.Thesubwooferwillturnitself   
					onautomaticallywhenanaudiosignalispresent.Ifnosignalispresentfor   
					approximately15minutes,theunitwillswitchtostandbymode.Whilein   
					standymode,yoursubwooferwilldrawveryminimalpower.Thisfunction   
					canbedisabledbyleavingtheswitchinthe"on"position.   
					☞ 
					4 
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				Externalremotejack   
					Thisconnectionallowsanauxiliaryinfraredremotereceiver"eye"tobeinstalledand   
					placed where most convenient. This option is usually only required when the   
					subwooferistobepartofacustominstallationinwhichthebuiltin"eye"(located   
					adjacenttothespeakeronthefrontbaffle)willbehiddeninalocationwhereitcan   
					notadequatelyreceivesignalsfromtheremote.   
					Highpasscrossover switch-80Hz (THX)/100Hz   
					This switch selects the frequency for the high pass crossover outputs. This   
					crossoverisfunctionalonbothlineandspeaker-leveloutputs.Smallerspeakerswith   
					limitedlowfrequencyabilitymaypreferthehigher100Hzsettingwhichwillreduce   
					thelowfrequenciessenttothem.Largerspeakerswithgreaterlowfrequencyoutput   
					maybeabletohandlethe80Hzsettingwithoutstrain.   
					Powerswitch   
					Themasterpowerswitchislocatedontherighthalfoftheunit.Thisrockerstyle   
					switchisthemainon/offfortheunit.Thisswitchshouldbesettoposition 1(up)   
					foron,and0(down)foroff.Iftheunitistobeleftunusedforanextendedperiodof   
					time,themasterpowerswitchshouldbeturnedoff.   
					Detachablepowercord   
					Allowsforeasyreplacementshouldtheoriginalbedamaged.   
					Line-Level Connection   
					Figure1showsconnectiontoapre-amplifier'smainoutputsandreturning   
					themtoyouramplifierinputs.   
					Wheninstalledinthisfashion,yoursatellitespeakerswillbecrossedoverat80/   
					100Hzwhichremovesthelowerbassfromyouramplifierandspeakers,enablingthem   
					todoabetterjobreproducinghighfrequencies.Byutilizingthismethod,youwill   
					haveabi-amplifiedsystem,gainingimprovedpowerandheadroomforyoursystem.   
					THXUltra2Operation:   
					OnthebackpanelofthesubwooferselecttheTHXSubwoofervolume   
					levelandtheSubsonic,X-Over,andHigh-PassCrossoverTHXsettings.   
					continued. . .   
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					5 
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				Figure 1: Installation Using Line-Level Inputs   
					AMPLIFIER   
					PRE-AMP   
					MAIN INPUTS   
					MAIN OUTPUTS   
					MAIN OUTPUTS   
					RIGHT LEFT   
					LEFT RIGHT   
					RIGHT   
					LEFT   
					TOSATELLITESPEAKERS   
					Subwooferoutputs   
					TheVelodynesubwooferisdesignedtooperateusingthefullrangeaudiosignal   
					for input when using the built-in crossover. Some processors/receivers, have a   
					"subwoofer out" jack that is internally filtered and designed to be used with a   
					conventionalamplifierandspeaker.Insomerarecases,combiningbothanexternal   
					crossover and the one internal to the subwoofer may result in low output and   
					increased noise. In these installations you may need to bypass the internal   
					crossoverineithertheprocessororVelodynesubwoofer.Insomeinstallations,   
					simplysettingonecrossovertoahigherfrequency(suchas120Hz)willrestore   
					maximumperformance.Tobypassthesubwoofer'sinternalcrossoverwhentheunit   
					is being fed a low pass signal from another crossover, simply locate the switch   
					markedX-over,OUT-INontherearpanelofthesubwooferandsettotheOUT   
					position.Thiswilleliminatetheinternalcrossoverfromthesignalpath. Note:Ifnot   
					usinganexternalperformance.   
					☞ 
					6 
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				Speaker-Level Connection   
					Figure2showsaneasywaytoconnectyourVelodynesubwooferdirectlytoyour   
					receiverorintegratedamplifier. Whenconnectedinthisfashion,yoursatellite   
					speakerswillbecrossedoverat80/100Hz,whichremovesthelowerbassfromyour   
					speakers,enablingthemtodoabetterjobreproducinghighfrequencies.Youmay   
					alsoconnectyoursatellitesdirectlytoyourreceiveroramplifieralongwiththe   
					subwooferifyouwishtobypasstheinternalhigh-passcrossover.   
					Caution!!! Toavoiddamagetoyourmainamplifier,besuretomaintaincorrect   
					polaritywhenmakingallconnections.Red(positive)tored,andblack(negative)   
					toblack.Besurethatallconnectionsaretight,andthattherearenoloosestrands   
					orfrayedwires.   
					Figure 2: Installation Using Speaker-Level (from amplifier) Inputs   
					MAINOUTPUTS   
					(speaker-level)   
					SATELLITESPEAKERS   
					INTEGRATEDAMP/RECEIVER   
					☞ 
					7 
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				Interconnect Cables   
					WheninstallingyournewVelodynesubwooferusingthelinelevelconnections,   
					you should always use shielded phono cables. There are many decent cables   
					availabletoday,mostanyofwhichwillworkperfectlywell.Wedorecommendthat   
					you keep the length of cable as short as possible to avoid any potential noise   
					problems.   
					When using speaker level connections, use a decent quality speaker cable that   
					mateswellwiththeconnectors.Beverycarefultoavoidanyloosestrandsorfrayed   
					wireswhichmayresultinashort,whichmaydamageyourequipment.Cablesof   
					extremelylargesizearetypicallynotrequired.Extremelylargegaugewiremaynot   
					properlyfitinthebindingposts,resultinginapoorconnectionandpossibleshort   
					circuits.   
					Placement   
					Truesubwoofersoperateatextremelylowfrequencieswhichareprimarilynon-   
					directional.Whileitisrecommendedthatthesubwooferbeplacedonthesameplane   
					asthesatellitespeakers,roomandsystemconditionsoftendictateotherwise.Keep   
					inmindthatfrequencyresponseandoutputlevelcanbedrasticallyinfluencedby   
					placement,dependingontheacousticpropertiesofthelisteningroom.Typically,   
					theoptimumlocationforasubwooferistuckedawayinacornerofyourlistening   
					room.Thislocationwillusuallyofferthegreatestoutputlevelsandoptimumlow   
					frequencyextension.Theworstlocationforasubwooferittypicallyfarawayfrom   
					anywalls,andclosetothecenterofyourroom.Avoidtheselocationswhenpossible.   
					WhenusingapairofVelodynesubwoofersinstereo,itispreferabletoplaceeach   
					subwooferbythesatelliteofthesamechannel.   
					Caution! Thissubwooferhaselectronicsbuiltintothecabinet.Donotplacethe   
					cabinetnexttosourcesofheatsuchasfurnaceregisters,radiators,etc.Donot   
					placetheunitnearsourcesofexcessivemoisture,suchasevaporativecoolers,   
					humidifiers,etc.Thepowercordshouldberoutedinsuchawaythatitwillnot   
					bewalkedon,pinched,orcompressedinanywaythatcouldresultindamaging   
					theinsulationorwire.   
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				RegardlessofwhereyouinstallyourVelodynesubwoofer,itmustremain   
					inanuprightposition(wooferfacingforward).Using,shipping,orotherwise   
					storingthesubwooferinanyotherpositionforanextendedperiodoftime   
					mayresultindamagetotheunitnotcoveredbywarranty.   
					The subwooferismagneticallyshieldedtoreducetheamountofstray   
					magneticenergyemittedfromthespeaker'smotorstructure.Thisgreatly   
					increasesflexibilitywhenplacingtheunitclosetovideomonitorsasthere   
					isverylittlestraymagnetism.However,thisshieldingmaynotbeadequate   
					incertainextremelysensitiveinstallations.Certaintypesoftelevisions   
					areparticularlysensitivetostraymagneticfields.Ifyourtelevisionproduces   
					distortedcolorsafterinstallingyoursubwoofer,simplyincreasethedistance   
					betweenyourtelevisionandthesubwoofer,untilnormalcolorandoperation   
					isreturned.   
					Protection Circuitry   
					Your new subwoofer is equipped with special protection circuitry to   
					providemaximumperformancewithgreatestreliability.   
					Theunitisprotectedagainst:   
					1) Overdrivingthespeakeroramplifier.   
					2) Overheatingtheamplifier.   
					3) Excessivedropinpowerlinevoltage.   
					Thefirsttypeofprotectioncircuitrywhichpreventsoverdrivingofthe   
					speakeroramplifieroperatesconstantlywithoutbeingaudibleundermost   
					situations.Insomeextremesituations(sustainedhighoutputlevelssuchas   
					prosoundusage),theunitmayshutdownmomentarily.Thebluepowerled   
					mayalsoblinkrapidly.Thisindicatesoperationofthethermalorundervoltage   
					protectioncircuitry.Ifthisshouldhappen,youshouldreducethevolume   
					settingorshuttheunitoffuntilnormaloperatingconditionsreturn.Youmay   
					alsowanttoplugtheunitintoadifferentwalloutlet,asdroppingpowerline   
					voltagewillbemostnoticeableunderstrenuousconditions.   
					continued. . .   
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				Distortion in Loudspeakers   
					Nonlineardistortionisaproblemwhichplaguesallspeakers.Thisparticulartype   
					ofdistortionisacommonprobleminsubwoofers,whichmustmovelargeamounts   
					ofairtoproduceadequatelevelsofdeepbass.Nonlineardistortionisdefinedasany   
					form of distortion that moves energy from one portion of the audio frequency   
					spectrumtoanother.Whenasingletoneisappliedtoanonlinearsystem,theresult   
					isharmonicdistortion.Inwhichsomeoftheenergyleavesthesystematmultiples   
					oftheoriginalfrequency.Whenmultipletonesareapplied,intermodulationtones   
					areproduced,usuallyassimplecombinationsoftheinputfrequencies.Generally,   
					3%distortionisconsideredareasonableamountforspeakers.Thismeansthat3%   
					ofthetotalenergyleavingthespeakerisatfrequenciesotherthantheintendedinput   
					signal.   
					Most subwoofers on the market today however, produce much more than 3%   
					distortionatcommonlisteninglevels.Manymodelswehavetestedproducegreater   
					than20%distortion@20Hzwhendrivento100dB.Thisisatypicaloutputlevel   
					obtainedinmanysystems,particularlyhometheatersystems.Evenat1watt,many   
					conventionalunitsproduceseveralpercentdistortion.Secondly,theoddorder,   
					higherharmonicsaremuchmoreoffensivetothehumanearthanthecloser2nd   
					harmonic.   
					Aninterestingresultofthisreduceddistortionisthatsomeofthebass,whenplayed   
					overanextremelyaccuratesubwoofersystem,seemstoactuallybemissing.The   
					truth,however,isthatthe"missing"basswasnevertheretobeginwith!Distortion   
					products of conventional woofers actually add to the bass spectrum making it   
					appearlouderthanrecorded.Thisisduetotheadditionalandunwantedharmonics   
					(distortion)ofthefundamentalsignal.Whileconventionalsubwoofersofferlittle   
					tocombatdistortionproducts,weatVelodynehavedevelopedanotherway...   
					The Velodyne Servo-Control Solution   
					YourVelodyneHGSXsubwooferproducessoundinthesamemannerasconventional   
					loudspeakers:acone-shapedpistonisforcedtomovebymeansofalinearmotor.   
					However,thisisabouttheonlyconventionalpartofthesubwoofer.   
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				Wedeterminedthatconventionalmotorsareunacceptablewhencalled   
					upontoproducetheamountoflinearmotionwedesired.Thisinadequacy   
					ledustodesignanimprovedmotorstructurebyincorporatingtwocoils,   
					operatingoutofphaseinapush-pullconfigurationwithintwomagneticgaps   
					andsuspendedbydualspidersforevengreaterlinearity.Wedesignedthis   
					motortoproduceoverone inch(1-1/8"tobeexact)oflinearmotion,with   
					amaximummechanicallimitof2".Also,withthisuniqueconfiguration,the   
					distortionproductsarereducedbyafactoroftwooverconventionalsingle   
					coilstructureswithdramaticallyimprovedconecontrol.Thisdriveralone   
					wouldresultinlessdistortionthananyothernonservodesign.Wealso   
					designedthismotortobemagneticallyshieldedfromthestart,allowfor   
					convenientplacementnearthetelevisionmonitorsofhometheatersystems.   
					Theuniquepush-pulltwinvoicecoilinthesesubwoofersisdesignedandbuiltin-   
					houseonacustombuiltNCcoilwindingmachine.Thisuniquemachinewindsthis   
					coilinawaylikenoneother.Therearetwocoils,eachwithtwolayers,wouldonthe   
					sameformer.Twolayersarefirstwoundinsidetheformerandthentwolayerson   
					theoutside.Thisresultsinincreasedheatdissipationovernormaldesignswhich   
					simplypileaddedlayersontopofeachother,buryingseverallayersbeneaththe   
					surface.WethenutilizedmaterialssuchasPolyimideresinimpregnatedfiberglass,   
					for the former. This material is capable of withstan- ding the extremely high   
					temperatures(320degreesC)thatcanoccurwhendrivenbyourpowerfulamplifiers.   
					Thisresultsinexcellentlong-termpowerhandlingcapabilities.   
					ThesespeakersalsofeatureournewMulti-LayerResinLaminatecone   
					system.Thisnewconestartswithtwo-layersofreinforcedpulpfiber,which   
					arethenheatpressedwithabindingresintoformanextremelyrigidcone   
					structure. This helps to reduce distortion by decreasing cone flex and   
					breakup.Attachedtotheedgeoftheconeisournewlydesignedrubber   
					surround,tailoredforlonglifeunderthehighexcursionstheseunitsare   
					capableof.   
					As in our other servo products, we then incorporated closed-loop   
					accelerometerbasedservo-controloftheloudspeaker.Attheheartofthis   
					controlsystemisalowmassaccelerometerrigidlyattachedtothevoice   
					coil.Theaccelerometercontinuouslymonitorsconemotions,providingus   
					continued. . .   
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				withafeedbacksignalfortheservocontrolcircuitry. Thishigh-gainsystemis   
					designedtoimprovelinearityandreducedistortionapproximately30timesover   
					conventionalnon-servosystems.Whiletheinputsignalisbeingsenttotheamplifier   
					whichpowersthedriver,acontinuoussignalrepresentingconemotionisbeingsent   
					toacomparatorcircuit.Thiscircuitconstantlyadjustsforanydeviationbetween   
					theinputsignalandthesubwoofer'soutput.Thisselfregulationresultsinextreme   
					controloverconemovement,andveryaccuratelowdistortionsound.   
					Toprovidethepowerfordrivingthismassiveloudspeaker,weincorporated   
					anextremelyefficientClassDswitchingamplifier.Onethatiscapableof   
					runningcooltothetouchandproviding1250watts(RMS)and3000watts   
					peak power! At typical listening levels, the HGS-15X THX Ultra 2   
					produceslessthan0.5%harmonicdistortionwithinputsignalsextending   
					to20Hzandbelow. Evenattheirmaximumoutputlevel,thedistortion   
					barelyexceeds1%,far betterthananyconventionaldesigncurrentlyonthe   
					market.Thiscombinationprovidesyouwiththebestcombinationofclean,   
					deep,accuratebass,withoutmakinganysacrificetodistortion.   
					Care of Your Subwoofer   
					Do not use any harsh detergents or chemicals to clean the cabinet.   
					Abrasives,detergents,orcleaningsolutionsmaydamagethefinishonthe   
					cabinet.Werecommendusingadampclothtocleanthecabinet.During   
					normal conditions, your new subwoofer may be left on continuously   
					withoutanyproblems.Theunitisequippedwithasignal-sensingturnon/   
					offthatwillautomaticallyturnontheunitwhenasignalispresentattheinputs   
					andturnoff theunitafterseveralminuteswhenthereisnolongeranysignal   
					attheinputs.Ifyouplantoleavethesubwooferunusedforanextended   
					periodoftime,werecommendthatyouturnoffthemasterpowerswitch   
					ontherearpanel.   
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				Troubleshooting and Service   
					Ifyoushouldexperienceaproblemwiththeoperationofyoursubwoofer,   
					pleasecheckallofthefollowingbeforeseekingservice.Followingisa   
					simpletroubleshootingguidetoassistyou.   
					1. Verifyunitispluggedinandpoweroutletusedisactive.   
					2. Ispowerswitchon?   
					3. Isautoturnon/offsetproperly?   
					4. Isunitreceivinganinputsignalfromyoursource?   
					5. Haveallcontrolsonsubwoofer(volume,crossover,phase,etc.)beenproperly   
					set?   
					6. Isthemuteontheremotecontrolengaged?   
					7. Arebothvolumecontrolsproperlyset?   
					8. Ifunithasbeenrunningathighlevelsforanextendedperiodoftime,oneofthe   
					protectioncircuitsmaybeengaged.   
					• Hasthebuilt-inamplifieroverheated?   
					• Isyourpowerlinevoltagesaggingunderheavyuse?   
					If the protection circuitry is active, the unit may cycle on and off until   
					operating parameters return to normal. Protection circuit operation is   
					usuallyindicatedbyablinkingpowerLED.Undermoreseriousconditions,   
					theunitmayshutoffcompletely.Normaloperationwillreturnuponcooling,   
					butyoumayberequiredtoturnthepoweroffandthenonagaintoreset   
					theunit.   
					Thefollowingconditionsrequireservicebyaqualifiedtechnician:   
					1. Thepowercordhasbecomedamaged.   
					2. Theunitdoesnotappeartooperatenormallyorexhibitsamarkedchangein   
					performance.   
					3. Theunithasbeenexposedtowater.   
					4. Somepartofthecabinetorcircuitryisphysicallydamaged.   
					Thank you for purchasing a Velodyne!   
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				SPECIFICATIONS   
					Cabinet(H/W/D)   
					HGS-15XTHXUltra2   
					19.75"x18"x17-7/8"   
					(49x45x45cm)   
					FrequencyResponse   
					HarmonicDistortion   
					SubsonicFilter   
					18Hz-120Hz+/-3dB   
					lessthan.5%   
					15Hzor35Hz   
					HighPassCrossover   
					LowPassCrossover   
					80Hzor100Hz(6dB/octave)   
					40Hz-120Hz   
					(12dB/octaveinitial,48dB/octaveultimate)   
					0°/180°   
					Phase   
					Amplifier   
					Woofer-forwardfiring   
					Magnet   
					ClassD,1250wattsRMS,3000wattspeak   
					15" (12.7"pistondiameter)   
					220oz. (13.7lbs.)   
					MagnetStructure   
					VoiceCoil   
					Inputs   
					Outputs   
					Warranty   
					380oz. (24lbs.)   
					Tandem3"push-pull   
					Line-level,Balancedandspeaker-level   
					Line-levelandspeaker-level   
					Twoyears(partsandlabor)   
					95lbs.(approx.) (43Kg)   
					Weight   
					Specifications are subject to change without notice.   
					FOR YOUR RECORDS. . .   
					DATEPURCHASED _______________________________________   
					DEALER _________________________________________________   
					SERIAL# ________________________________________________   
					*NOTE: Please complete and return your warranty card within ten (10) days or   
					Register. . . ON LINE . . .It's faster . . . and easier   
					
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				Installation Worksheet   
					Date: _____________   
					Model/Serial # ________________   
					Installed by: ____________________ Phone: _______________   
					Volume Setting: ____________ Output Level (dB): _________   
					Low Pass X-Over: _________ Hz Phase Pos.: 0°________   
					180°________   
					HighPassX-Over: 80Hz_________   
					100Hz_________   
					SubSonic: 15Hz_________   
					35Hz_________   
					OutputLevels:(Speakers)   
					LeftFront:_________dB   
					LeftRear: _________dB   
					RightFront:_________dB   
					RightRear: _________dB   
					Center:_________dB   
					Other Velodyne Subwoofer Products:   
					CHTSeries   
					SPLSeriesII   
					CHT-8   
					CHT-10   
					CHT-12   
					SPL-800SeriesII   
					SPL-1000SeriesII   
					SPL-1200SeriesII   
					SPL-523Satellites   
					CHT-15   
					CHT Front Row System   
					DigitalDriveSeries   
					DD-10   
					VX-10   
					DD-12   
					DD-15THXUltra2   
					DD-18THXUltra2   
					DLSSeries   
					DLS-3500   
					DLS-3750   
					DLS-4000   
					Signature1812   
					DecoSystem   
					Deco System   
					Deco Satellites   
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				“Not only was the little Velodyne the best small sub I’ve ever used, it was   
					one of the very best subs I’ve used.”   
					-John Potis   
					SoundStage!, April 2002   
					“The SPL-1200 was able to hit an impressively deep 16 Hz”.   
					-Tom Noussaine   
					Sound & Vision, June 2001   
					“How do they get this kind of bass out of such a tiny box? Deep, tight, tuneful   
					and loud enough to rattle pictures on the wall—this is serious subwoofing.”   
					-Robert Deutsch   
					Stereophile Guide to HomeTheater, September 1998   
					Velodyne Acoustics, Inc.   
					345 Digital Drive   
					Morgan Hill, CA 95037   
					408.465.2800 voice   
					408.779.9227 fax   
					
					
					
					
					Printed on recycled paper.   
					10-03, #63-HGS15X RevA   
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