Velodyne Acoustics HGS-12X User's Manual
Contents
1. 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 SoundStagel April 2002 The SPL 1200 was able to hit an impressively deep 16 Hz Tom Noussaine Sound amp 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 Home Theater September 1998 Velodyne Acoustics Inc 345 Digital Drive Morgan Hill CA 95037 408 465 2800 voice 408 779 9227 fax www velodyne com Service E mail service velodyne com Product E mail helb velodyne com Technical E mail techhelp velodyne com Printed on recycled paper 63 HGS12X 220CT03 Rev A HGS 12X Owner s Manual Velodyne High Gain Servo Controlled Audio Video Subwoofer System Other Velodvne Subwoofer Products VX 10 DLS Series DLS 3500 DLS 3750 DLS 4000 CHT Series CHT 8 CHT 10 CHT 12 CHT 15 CHT Front Row System CHT 14 Satellites CHT 24 Center Channel Deco System Deco Satellites SPL Series Il SPL 800 II SPL 1000 II SPL 1200 II SPL 523 SPL 23 Digital Drive Series DD 10 DD 12 DD 15 THX Ultra 2 DD 18 THX Ultra 2 Signature 1812 Installation Worksheet Date Model Serial ff Installed bv Phone Volume Setting OutputLevel dB Low Pass X Over High Pass X Over 80 Hz 100Hz2. Output Levels Speakers Left Front dB Left Rear dB Center Hz Phase Pos 0 180 Sub Sonic 20 Hz 35 Hz Right Front dB Right Rear dB dB FOR YOUR RECORDS DATE PURCHASED DEALER SERIAL NOTE Please complete and return your warranty card within ten 10 days Or Register ONLINE It s faster and easier www velodyne com 13 IMPORTANT SAFETY INSTRUCTIONS CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN Caution To reduce the risk of electric shock do not remove cover or back No user serviceable parts inside Refer servicing to qualified service personnel The lighting flash with arrowhead symbol is intended to alert the user to the presence of uninsulated dangerous voltage within the product s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons The exclamation point symbol is intended to alert the user to the presence of important operating and maintenance servicing instructions in the literature accompanying the subwoofer akoON gt D 12 13 14 20 Read Instructions All safety and operating instructions should be read before the subwoofer is operated Retain Instructions The safety and operating instructions should be retained for future reference Heed Warnings All warnings on the subwoofer and in the operating instructions should be adhered to Follow Instructions All operating and us
3. amplifier designs to obtain our traditionally accurate sound while increasing efficiency and output to new standards This exceptional subwoofer will provide you with years of unparalleled listening pleasure Enjoy Caution Please observe the following instructions to insure safe and proper system operation Warning To prevent fire or shock hazard do not expose this equipment to rain or moisture To avoid electrical shock do not open speaker enclosure or amp chassis cover Please observe all warnings on the equipmentitself There are no user serviceable parts inside Please refer all service questions to your authorized Velodyne dealer Prior to installation Please unpack the system carefully This unitis heavy Use caution when lifting or moving to avoid injury Remove all staples used to seal the carton as they can scratch the cabinet Please save the carton and all packaging materials for future use Packing this unit in any other carton may result in severe damage when shipping Please take amomentto record the serial number and date location of purchase in the space provided on the warranty card for future reference Important Note Do not move unit while plugged in continued 1 IS control system is alow mass accelerometer rigidly attached to the voice coil The accelerometer continuously monitors cone motions providing a feedback signal for the servo control circuitry This high gain system is designed to improve
4. Chaleur Placer l enceinte loin de toute source de chaleur tels que radiateurs compteurs thermiques fours ou autres enceintes d gageant de la chaleur 10 Sources d lectricit Ne brancher l enceinte que dans une prise du type d crit dans le mode d emploi ou comme indiqu par le fabricant 11 Protection du cordon lectrique Les cordons lectriques doivent tre fix s pour viter que toute personne ne marche dessus et que rien ne puisse tre plac sur ou contre eux faire tout particuli rement attention aux cordons branch s dans des prises lectriques des r ceptacles et leurs points de sorties de l enceinte 12 Attention Afin d viter tout choc lectrique 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 P riodes de non utilisation Le cordon lectrique de l enceinte doit rester d branch si l enceinte reste inutilis e pendant une longue p riode de temps 15 Infiltration d objet ou de liquide Faire attention ce qu aucun objet ne tombe et ce qu aucun liquide ne soit vers sur l enceinte 16 Dommages n cessitant r paration Lenceinte ne doit tre r par e que par du personnel qualifi lorsque a le cordon lectrique ou la prise ont t endommag s b Des objets sont tomb s ou du liquide a t vers sur l enceint
5. St nder benutzen T Wand oder Deckenbefestigung Subwoofer nur den Herstellerempfehlungen gem an der Wand oder Decke befestigen 8 Bel ftung Subwoofer so aufstellen da die erforderliche Bel ftung nicht behindert wird D h Subwoofer nicht auf einer weichen Oberfl che wie einem Bett Sofa Teppich o aufstellen die die Bel ftungs ffnungen blockieren kann Subwoofer gleichfalls nicht in einem Regal oder Schrank unterbringen worin die Luftzufuhr behindert wird l 9 Warme Subwoofer nicht in der Nahe von Warmequellen wie Heizk rpern Warmespeichern Ofen oder anderen warmeerzeugenden Subwoofern aufstellen 10 NetzanschluB Subwoofer nur an eine der in der Bedienungsanleitung beschriebenen oder auf dem Subwoofer angegebenen Stromquellen anschlie en 11 Netzkabelschutz Netzkabel so verlegen da nicht daraufgetreten wird oder sie durch darauf oder dagegengestellte Gegenst nde eingeklemmt werden k nnen Die Anschlu stellen des Netzkabels an Steckdosen und am Subwoofer dabei besonders beachten 12 Vorsicht Zur Vermeidung von Gefahr durch elektrischen Schlag sicherstellen da der Schutzkontakt des Steckers vollst ndig in die Steckdose eingef hrt ist 13 Reinigung Subwoofer nur den Herstellerempfehlungen gem reinigen 14 Betriebsfreie Zeitr ume Netzkabel des Subwoofers aus der Steckdose ziehen wenn er ber einen l ngeren Zeitraum nicht benutzt wird 15 Besch digungen durch Gegenst nde ode
6. anderweitigen ServicemaBnahmen von qualifiziertem Wartungspersonal durchf hren lassen a b c d SPECIFICATIONS HGS 12X Cabinet H W D inc feet grill Frequencv Response Harmonic Distortion Subsonic Filter High Pass Crossover Low Pass Crossover Phase Amplifier Class D Woofer forward firing Magnet Structure VoiceCoil Inputs Outputs Warranty parts labor Weight approx 14 3 4 x 14 x 15 7 8 37 x 35 x 40 cm 20Hz 120Hz 3 dB lt 1 typical 20Hzor35Hz 80Hz 6dB octave 40Hz 120Hz 12dB octaveinitial 8 dB octave ultimate 0 180 1250 watts RMS 3000 peak 12 9 7 piston diameter high excursion2 max 310 0z 19 3 lbs Tandem 3 push pull Line level Line level 80Hzup Twovears 60 Ibs 27 Kg Specifications are subject to change without notice 12 Troubleshooting and Service If you should experience a problem with the operation of your subwoofer please check all of the following before seeking service Following is a simple troubleshooting guide to assist you BARRE Verify unitis plugged in and power outlet used is active Is auto turn on off set properly Is unitreceiving an input signal from your source Have all controls on subwoofer volume crossover phase etc been properly set Ifunithas beenrunning athigh levels foranextended period of time one of the protection circuits may be engaged e Has the built in amplifier o
7. le mode d emploi Tous les conseils de s curit et de fonctionnement doivent tre lus avant de mettre en marche l enceinte 2 Garder le mode d emploi Il est conseill de conserver les conseils de s curit et de fonctionnement pour un ventuel usage futur 3 Avertissements Il est important de se conformer tous les conseils de fonctionnement concernant l enceinte et toutes les instructions inscrites sur l enceinte 4 Suivre les conseils Tous les conseils d utilisation et de fonctionnement doivent tre suivis la r gle 5 Eau et humidit Ne pas utiliser l enceinte pr s d une source d eau par exemple pr s de la baignoire d une bassine de lavage d un vier de cuisine d un bac lavage dans un sous seul mouill pr s d une piscine 6 Pieds et Supports N utiliser que des pieds et supports recommandes par le fabricant 7 Assemblage mural ou au plafond Se conformer uniquement aux instructions du fabricant pour fixer f enceinte sur un mur ou sur un plafond 8 Ventilation Il est important de placer l enceinte de telle sorte qu elle ne g ne pas sa propre ventilation Par exemple ne pas placer l enceinte sur un lit un canap sur la moquette ou sur toute surface similaire qui bloque les ouvertures de ventilation ne pas poser l enceinte dans une meuble encastr ou ferm telle qu une biblioth que ou un meuble qui emp che l air de circuler par les ouvertures de ventilation de l enceinte 9
8. the energy leaves the system at multiples of the original frequency When multiple tones are applied intermodulation tones are produced usually as simple combinations of the input frequencies Generally 3 distortion is considered areasonable amount for speakers This means that 3 of the total energy leaving the speaker is at frequencies other than the intended inputsignal Most subwoofers on the market today however produce much more than 3 distortion at common listening levels Many models we have tested produce greater than 20 distortion 20Hz when driven to 100dB This isatypical outputlevel obtained in many systems particularly home theater 8 IS for a subwoofer is tucked away in a corner of your listening room This location willusually provide the greatest output levels with optimum low frequency extension The worst location for a subwoofer it typically far away from any walls and close to the center of your room Avoid these locations when possible When using a pair of Velodyne subwoofers in stereo itis preferable to place each subwoofer by the satellite of the same channel Caution This subwoofer has electronics built into the cabinet Do not place the cabinet next to sources of heat such as furnace registers radiators etc Do not place the unit near sources of excessive moisture such as evaporative coolers humidifiers etc The power cord should be routed in such a way that it will not be walked on pinched or comp
9. PUSM DULL MOTORS 100 MADMET XTTIKACFTMM 250 WATTS AO PEAK PATENTED MIN AIN servo IMTTA BPPICTEWI CLASS D AM ete ee Uh TE PRE AMP AMPLIFIER MAIN OUTPUTS LEFT RIGHT gt MAIN INPUTS MAIN OUTPUTS LEFT RIGHT RIGHT LEFT TOSATELLITESPEAKERS continued 5 Is receivers have a subwoofer out jack that is internally filtered and designed to be used with aconventional amplifier and speaker In some rare cases combining both an external crossover and the one internal to the subwoofermay resultin low outputand increased noise Inthese installations you may need to bypass the internal crossover in either the processor or Velodyne subwoofer In some installations simply setting one crossover to ahigherfrequency suchas 120 Hz will restore maximum performance To bypass the subwoofer s internal crossover when the unit is being fed alow pass signal from another crossover simply locate the switch marked X over OUT IN on the rear panel of the subwoofer and set to the OUT position This will eliminate the internal crossover from the signal path Note If not using an external crossover vou should use the built in crossover for optimal performance Interconnect Cables Wheninstalling yournew Velodyne subwooferusing the line levelconnections vou should alwavs use shielded phono cables There are manv decent cables available today most any of which will work perfectly well Wedo recommend that
10. e c Lenceinte a t expos e la pluie d L enceinte ne semble pas fonctionner normalement ou indique un changement de performance e Lenceinte est tomb e par terre ou a t endommag e 17 Entretien L utilisateur ne doit pas tenter de r parer l enceinte au del de ce qui est d crit dans le mode d emploi 18 Surcharge Ne pas surcharger les prises murales les rallonges ou les prises femelles encastr es de commodit On risquerait un incendie ou un choc lectrique 19 Pi ces de rechange Lorsque le remplacement d une pi ce s av re n cessaire s assurer que le technicien utilise la pi ce sp cifi e par le fabriquant ou une pi ce poss dant les m mes caract ristiques que la pi ce d origine Les substitutions non autoris es peuvent provoquer des incendies ou des chocs lectriques ou pr senter d autres dangers 20 Contr le de s curit Apr s toute intervention technique sur ce produit neuf ou r par demander au technicien de proc der un contr le de s curit pour v rifier qu il est en bon tat de marche Toute autre r paration doit tre r f r e du personnel qualifi Congratulations Congratulations on your purchase of a Velodyne subwoofer system This system represents the absolute state of the artin accurate low frequency reproduction We believe this to be one of the finest subwoofers available anywhere In this new subwoofer we have combined our radical new driver amp
11. e instructions should be followed Water and Moisture The subwoofer should not be used near water for example near a bathtub washbowl kitchen sink laundry tub in a wet basement near a swimming pool or the like Carts and Stands The subwoofer shouldbe used only with a cartor stand recommended by the manufacturer Wall or Ceiling Mounting The subwoofer should be mounted to a wall or ceiling only as recommended by the manufacturer Ventilation The subwoofer should be situated so that its location or position does not interfere with its proper ventilation For example the subwoofer should not be situated on a bed sofa rug or similar surface that may block the ventilation openings or placedin a built in installation such as abookcase or cabinetthat may impede the flow of air through the ventilation openings Heat The subwoofer should be situated away from heat sources such as radiators heat registers stoves or other subwoofers that produce heat Power Sources The subwoofer should be connected to a power supply only of the type described in the operating instructions or as marked on the subwoofer Power Cord Protection Power supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against them paying particular attention to cords at plugs convenience receptacles and the point at which they exit from the subwoofer Caution To prevent electrical shock match wide blade of pl
12. gnal sensing auto turn on off defeatable e Variable volume control e Selectable phase control 0 or 180 e Selectable subsonic filter 20Hz or 35Hz e Frequency response of 20Hz 120Hz 3dB e Detachable power cord e Anti clipping circuit prevents overexcursion and amp clipping e Optional remote control with power volume and mute functions Installation Yournew Velodyne servo subwoofer provides fora number of installation options Read all the installation information below in order to determine which installation option is best for your system Remember to perform all installation procedures with subwoofer unplugged Inputs Your new subwoofer is equipped with line level inputs Use the LINE LEVEL jacks when connecting your subwoofer to a pre amp signal processor line level crossover orreceiver with pre amp level outputs If yourreceiver electronics does not have RCA type line level outputs you must use a high to low level adapter Consult the dealer where you purchased the unit for further details continued 2 IS Volumecontrol This control allows you to balance the output from the subwoofer to the main speakers amplifier in your system This control should be set to achieve similar output level from both the main speakers and subwoofer when listening to music A good starting point for the volume control is 4 or5 dots from minimum Low pass crossover 40 to 120Hz The line level inputs sum the left and
13. ine that the product is in proper operating condition All other servicing should be referred to qualified service personnel WICHTIGE SICHERHEITSHINWEISE VORSICHT GEFAHRLICHE SPANNUNG NICHT OFFNEN Vorsicht Zur Vermeidung von Gefahr durch elektrischen Schlag Deckel oder R ckwand nicht abnehmen Produkt enth lt keine Anwenderteile Reparatur und Wartung nur von qualifiziertem Fachpersonal vornehmen lassen Das Blitzsymbol dient als Hinweis auf unisolierte gef hrliche Spannungen innerhalb des Geh uses deren Werte eine Ber hrungsgefahr f r den Menschen darstellen k nnen Das Symbol mit dem Ausrufungszeichen dient als Hinweis auf wichtige in den Unterlagen des Subwoofers enthaltene Bedienungs und Wartungsvorschriften ill Anleitungen lesen Alle Sicherheits und Bedienungsanleitungen vor Inbetriebnahme des Subwoofers aufmerksam durchlesen 2 Anleitungen aufbewahren Die Sicherheits und Bedienungsanleitungen zur spateren Bezugnahme aufbewahren 3 Warnungen beachten Alle Warnungen am Subwoofer und in der Bedienungsanleitung unbedingt beachten 4 Anleitungen befolgen Alle Bedienungs und Gebrauchsanleitungen genau befolgen 5 Wasser und Feuchtigkeit Subwoofer nicht in der Nahe von Wasser aufstellen d h neben einer Badewanne Sp le Waschmaschine in einem feuchten Keller in der N he des Swimmingpools o 6 Rollwagen und St nder Subwoofer nur mit einem vom Hersteller empfohlenen Rollwagen oder
14. linearity and reduce distortion approximately 30 times over conventional non servo systems While the input signal is being sent to the amplifier which powers the driver a continuous signal representing cone motion is being sent to acomparator circuit This circuit constantly adjusts for any deviation between the input signal and the subwoofer s output This selfregulation results in extreme control over cone movement and very accurate low distortion sound Toprovide the power for driving this massive loudspeaker we incorporated an extremely efficient Class D switching amplifier This new amplifier features our patent pending energy recovery circuit design which drastically reduces wasted energy heat as compared to traditional switching designs One that is capable ofrunning cool to the touch and providing 1000 or 1250 watts RMS depending onthe model of power Attypical listening levels the HGSX produces less than 1 90 harmonic distortion with input signals extending to 20Hz At higher levels the distortion barely exceeds 1 far betterthan any conventional design currently onthemarket This combination provides you with the best combination of clean deep accurate bass without making any sacrifice to distortion Care of Your Subwoofer Do not use any harsh detergents or chemicals to clean the cabinet Abrasives detergents or cleaning solutions may damage the finish on the cabinet We recommend using a damp cloth to clean the cabinet D
15. lly when an audio signal is present Ifno signal is present for approximately 15 minutes the unit will switch to standby mode While in standby mode your subwoofer will draw very minimal power This function can be disabled by leaving the switch in the on position Remote sensor This connection allows for hook up of the optional remote control receiver With this optional receiver plugged in you will be able to utilize the functions of the remote tocontrol power volume and mute functions Place the infrared receiver within direct line of sight from your usual listening position Detachable power cord Allows foreasy replacement should the original be damaged Line Level Connection Figure 1 shows connection toa pre amplifier s main outputs and returning them to your amplifier inputs continued 4 gt When installed in this fashion your satellite speakers will be crossed over at 80Hz which removes the lowerbass from your amplifier and speakers enabling them to do a better job reproducing high frequencies By utilizing this method you will have abi amplified system gaining improved power and headroom for your system Subwooferoutputs The Velodyne subwoofer is designed to operate using the full range audio signal for input when using the built in crossover Some processors Figure 1 Installation Using Line Level Inputs zunwaoren LOWPASS VOL UE CROSSOVER kw Velodyne AT ee BAHN AT ING AL CD TANO M F
16. r Fl ssigkeiten Es ist darauf zu achten da keine Gegenst nde auf das Geh use fallen oder Fl ssigkeiten darauf versch ttet werden 16 Besch digungen die eine Reparatur erforderlich machen Subwoofer sollte von qualifiziertem Fachpersonal repariert werden wenn Das Netzkabel oder der Stecker besch digt sind Gegenst nde oder Fl ssigkeiten in den Subwoofer gelangt sind Der Subwoofer dem Regen ausgesetzt wurde Der Betrieb des Subwoofers gest rt ist oder seine Leistung deutlich nachgelassen hat e Der Subwoofer fallengelassen oder besch digt wurde 17 Reparatur und Wartung Durch den Benutzer auszuf hrende Wartungsma nahmen des Subwoofers sind auf die in der Bedienungsanleitung angegebenen Prozeduren beschr nkt 18 berlastung Zur Vermeidung von Brandgefahr und elektrischem Schlag Wandsteckdosen Verl ngerungskabel bzw eingebaute Steckdosen nicht berlasten 19 Ersatzteile Wenn Ersatzteile ben tigt werden sicherstellen da 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 Br nde elektrischen Schlag oder andere Gefahren verursachen 20 Sicherheitspr fung Nach Beendigung von Wartungs oder Reparaturma nahmen an diesem Produkt vom Servicetechniker Sicherheitspr fungen zum Nachweis des ordnungsgem en Betriebszustandes vornehmen lassen Alle
17. ressed in any way that could result in damaging the insulation or wire Regardless of where you install your Velodyne subwoofer it mustremain inan upright position woofer facing forward Using shipping orotherwise storing the subwoofer in any other position for an extended period of time may result indamage to the unit not covered by warranty Certain types of televisions are particularly sensitive to stray magnetic fields If your television produces distorted colors after installing your subwoofer simply increase the distance between your television and the subwoofer until normal color and operation is returned Protection Circuitry Your new subwoofer is equipped with special protection circuitry to provide maximum performance with greatestreliability Crossover switch In Out This switch allows theelectronic crossover circuitry to beremoved from the signal path This is preferable in certain installations which route the signal through external processors with a crossover circuit of their own suchas thenew digital units Simply move the switch to OUT to disengage the built in crossover For all other installations which do not have a separate electronic crossover we recommend you leave the internal crossover IN to provide optimum performance Auto turn on function With this function in the auto position your subwoofer can be safely left with the main power switch on continuously The subwoofer will turn itself on automatica
18. right channels together with the resulting signal passing through an adjustable low pass crossover before being amplified The crossover control allows you to adjust the upper limit of the subwoofer s frequency response from 40 to 120Hz The subwoofer s output will be reduced above the frequency you set this control to You should set the crossover frequency to obtain a smooth and seamless transition from the subwoofer to the main speakers in your system If your main speakers are smaller units with limited low frequency output youmay wish to choose a higher frequency such as 100 120Hz than you would with larger speakers which have greater low frequency output With larger speakers you might start with this control set lower such as 80Hz A bypass switch is also provided if you wish to use an external crossover If you are not using an external crossover we recommend that you use the one provided within the unit for optimum performance Phase adjustment 0 180 This control allows you the reverse the phase of the subwoofer s output signal 180 to correct for any possible mismatch and resulting cancellation between the subwoofer and vour main speakers amplifier To adjust simply listento the system with music playing Then move the switch from one position to the other and listen forachange mlow frequency output The correctposition will havea greater amount of apparent low frequency output Subsonic 20Hz 35Hz This adjustment alte
19. rs the low frequency limit of the subwoofer In certain movie theater installations which suggest that the extreme low bass be limited move the switch position to 35Hz and the response will be attenuated below this frequency 3 I Theunitis protected against 1 Overdriving the speaker or amplifier 2 Overheating the amplifier 3 Excessive drop in power line voltage The first type of protection circuitry which prevents overdriving of the speaker oramplifier operates constantly without being audible under most situations In some extreme situations sustained high output levels suchas pro sound usage the unit may shut down momentarily This indicates operation of the thermal or undervoltage protection circuitry If this should happen youshouldreduce the volume setting or shut the unit offuntil normal operating conditions return You may also want to plug the unit into a different wall outlet as dropping power line voltage will bemostnoticeable under strenuous conditions Distortion in Loudspeakers Nonlinear distortion is aproblem which plagues all speakers This particular type of distortionis acommon problem in subwoofers which must move large amounts of air to produce adequate levels of deep bass Nonlinear distortion is defined as any form of distortion that moves energy from one portion of the audio frequency spectrum to another Whena single tone is applied to anonlinear system the resultis harmonic distortion In which some of
20. the subwoofer We determined that conventional motors are unacceptable when called upon to produce the amount of linear motion we desired This inadequacy led us to design an improved motor structure by incorporating two coils operating out of phase ina push pull configuration within two magnetic gaps amp suspended by dual spiders for even greater linearity We designed this motor to produce over one inch 1 1 4 tobeexact of linear motion with amaximum mechanical limit of 2 peak to peak Also with this unique configuration the distortion products are reduced by a factor of two over conventional single coil structures with dramatically improved conecontrol This driver alone would result in less distortion than any other non servo design After optimizing every remaining part of the loudspeaker we then turned to the electronics As in our other servo products we then incorporated closed loop accelerometer based servo control of the loudspeaker At the heart of this 9 Is Product Features and Controls e 12 9 7 Piston Diameter subwoofer with tandem 3 voice coils and 310oz motor e Built in 1000 1250 watt RMS high efficiency Class D amplifier e Accelerometer based servo control system for extreme accuracy e Adjustable 40 to 120Hz low pass crossover defeatable e Multiple staggered low pass crossovers 12dB octave initial 48dB octave ultimate e Line level RCA inputs and outputs e 80 Hzhigh pass crossover output e Si
21. ug to wide slot fully inserted Cleaning The subwoofer should be cleaned only as recommended by the manufacturer Nonuse Periods The power cord of the subwoofer should be unplugged from the outlet when left unused for a long period of time Object and Liquid Entry Care should be taken so that objects do not fall and liquids are not spilled onto the enclosure Damage Requiring Service The subwoofer should be serviced by qualified service personnel when a The power supply cord or plug has been damaged b Objects have fallen or liquid has been spilled into the subwoofer c The subwoofer has been exposed to rain d Thesubwoofer does not appear to operate normally or exhibits a marked change in performance e The subwoofer has been dropped or damaged Servicing The user should not attempt to service the subwoofer beyond what is described in the operating instructions Overloading Do not overload wall outlets extension cords or integral convenience receptacles as this can result in a risk of fire or electric shock Replacement parts When replacement parts are required be sure the service technician has used replacement parts specified by the manufacturer or have the same characteristics as the original part Unauthorized substitutions may result in fire electric shock or other hazards Safety Check Upon completion of any service or service of repairs to this product ask the service technician to perform safety checks to determ
22. uring normal conditions your new subwoofer may be left on continuously withoutany problems The unitis equipped with a signal sensing turn on offthat will automatically turn on the unit whena signal is present at the inputs and turn off the unit after several minutes when there is no longer any signal at the inputs If you plan to leave the subwoofer unused for an extended period of time we recommend that you unplug the unit continued 10 i systems Evenat 1 watt many conventional units produce several percent distortion Secondly the odd order higher harmonics are much more offensive to the human ear than the closer 2nd harmonic An interesting result of this reduced distortion is that some of the bass when played over an extremely accurate subwoofer system seems to actually be missing The truth however is that the missing bass was never there to begin with Distortion products of conventional woofers actually add tothe bass spectrum making it appear louder than recorded This is due to the additional and unwanted harmonics distortion of the fundamental signal While conventional subwoofers offer little to combat distortion products we at Velodyne have developed another way The Velodyne Servo Control Solution The Velodyne HGS subwoofers produce sound in the same manner as conventional loudspeakers a cone shaped piston is forced to move by means ofa linear motor However this is about the only conventional part of
23. verheated e Is your power line voltage sagging under heavy use If the protection circuitry is active the unit may cycle on and off until operating parameters return tonormal Under more serious conditions the unitmay shutoffcompletely Normal operation willreturnuponcooling but you may be required to unplug the unit momentarily The following conditions require service by a qualified technician The power cord has become damaged The unit does not appear to operate normally or exhibits amarked change in performance The unit has been exposed to water Some part of the cabinet orcircuitry is physically damaged Thank you for purchasing a Velodyne continued 11 IMPORTANTES CONSIGNES DE SECURITE ATTENTION Risque d lectrocution Ne pas ouvrir Attention Afin d viter tout risque d lectrocution ne pas enlever le boitier ou partie arri re de l enceinte Aucune pi ce ne doit tre manipul e par l utilisateur Pour tout entretien vous r f rer un personnel de service qualifi Le symbol de l clair avec la fl che sert avertir l utilisateur de la pr sence d un voltage dangereux non isol dans l enceinte du produit d une magnitude pouvant constituer un risque d lectrocution de personnes Le symbol du point d exclamation sert avertir l utilisateur que d importants conseils de fonctionnement et de maintenance entretien sont fournis avec l enceinte d extr mes graves 1 Lire
24. you keep the length of cable as short as possible to avoid any potential noise problems When routing cables try to keep them away from equipment which generates significantnoise such as industrial or digital equipment Placement True subwoofers operate at extremely low frequencies which are primarily omni directional While itis recommended that the subwoofer be placed on the same plane as the satellite speakers room and system conditions often dictate otherwise Keepin mind that frequency response and output level can be drastically influenced by placement depending on the acoustic properties of the listening room Typically the optimum location 6 IS
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