Velodyne Acoustics 15X User's Manual
Contents
1. If you know subwoofers you know about Velodyne it s safe to say that when it comes to woofin done right Velodyne s bigger models are probably the safest bet there is we just sat there marvelling at the sheer power and majesty of this junior varsity Velodyne Corey Greenberg Home Theater Technology February 1995 Face Off Comparison of five subwoofers Model Tested VA 1012X Velodynes VA 1215xX is a great subwoofer It combines deep loud high quality output with a slick styling a fairly small cabinet full flexibility it s sure to stand tall next to the very best of its peers Tom Nousaine Video October1995 Model Tested VA 1215X Velodyne Acoustics Inc 1070 Commercial St Suite 101 San Jose CA 95112 408 436 7270 voice 408 436 7276 fax Web Site http www velodyne com E mail velodyne earthlink net Printed on recycled paper M1215XII Owner s Manual Velodyne Audio Video Subwoofer System 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 symbot 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 symbol2. registers radiators etc The power cord should be routed in such a way that it will not be walked on pinched or compressed in any way Regardless of where you install your VA 1215X1i subwoofer it must remain in an upright position passive radiator facing downward Using shipping or otherwise storing the VA 1215XI subwoofer in any other position for an extended period of time may result in damage to the unit not covered by warranty The VA 1215XI Subwoofer is magnetically shielded to reduce magnetic emission from its cabinet to increase the number of possible locations available for placement However this shielding may not be adequate for all installations Certain types of televisions are particularly sensitive to stray magnetic fields If your television produces distorted colors after installation of your VA 1215XII subwoofer simply increase the distance between your television and the VA 1215XII until normal color and operation is returned 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 During normal conditions the VA 1215XII subwoofer may be left on ti ed E continuously without any problems The unit is equipped with a signal sensing turn on off that will automatically turn on the unit when a signal is present at the input
3. and the one internal to the subwoofer may result in low output and increased noise In these cases to optimize your subwoofer performance you should bypass the internal crossover in your Velodyne subwoofer To bypass the crossover within the subwoofer simply locate the switch marked normal bypass on the back panel of the subwoofer and set to the bypass position This will eliminate the internal crossover function Note If not using an external crossover you should use the built in crossover for optimal performance Subwoofer out from A V Processor From the low pass output of your signal processor Install into right or left RCA line in connector in the back of the subwoofer or use a Y connector adapter into both right and left RCA line in connectors in the back of the subwoofer Speaker level connection Figure 2 shows an easy way to connect your VA 1215XI subwoofer directly to your receiver or integrated amplifier When connected in this fashion your satellite speakers will be crossed over at 80 100hz which removes the lower bass from your speakers thus enabling them to do a better job reproducing high frequencies You may also connect your satellites directly to your receiver or amplifier along with the subwoofer if you wish to bypass the internal high pass crossover ataia Figure 2 Installation using speaker level from amplifier inputs Woo Velodyne MAIN OUTPUTS speaker level INTEGRATE
4. is intended to alert the user to the presence of important operating and maintenance servicing instructions in the literature accompanying the subwoofer PUUN NO 12 13 14 16 17 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 Wamings All wamings on the subwoofer and in the operating instructions should be adhered to Follow Instructions All operating and use 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 should be used only with a car or 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 ona bed sofa rug or similar surface that may block the ventilation openings or placed in a built in installation such as a bookcase or cabinet that may impede the flow of air through the ventilation openings Heat The subwoofer should be situatedaway trom heat sources such a
5. D AMP RECEIVER SATELLITE SPEAKERS Caution To avoid damage to your main amplifier be sure to maintain correct polarity when making all connections Red positive to red and black negative to black Be sure that all connections are tight and that there are no loose strands or frayed wires Interconnect cables When installing your VA 1215XIl using the line level inputs outputs you should use standard shielded phono cables Always keep the lines as short as practical to minimize noise When using the speaker level inputs outputs use the same quality speaker cable to your subwoofer as you run to your satellites Placement The VA 1215xXIl operates at very low frequencies which are prima rily non directional While it is recommended that the subwoofer be placed on the same plane as the satellite speakers room and system conditions often dictate otherwise See your dealer for help in placement When using a pair of VA 1215XIl subwoofers in stereo it is preferable to place each subwoofer adjacent to the satellite of the same channel Keep in mind that frequency response and output level can be drastically influenced by placement depending on the acoustic properties of the listening room Typically the VA 1215XII will sound louder when placed next to a wall or in a corner Caution The VA series subwoofers have amplifiers built into the cabinet Do not place the cabinet next to sources of heat such as furnac
6. FROM AMPLIFIER inputs simulta neously Volume control This control allows you to balance the output from the subwoofer to the main speakers in your system This control should be set to achieve similar volume level from both the main speakers and subweofer f Low pass crossover Both sets of inputs sum the left and right channels together and the resulting signal is passed 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 120 hz The subwoofer s response will begin rolling off 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 you may 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 recom mend that you use the one provided within the unit for optimum performance Phase adjustment i This control allows you the ability to compensate for having the subwoofer in a different location than the main speakers Ideally you will have
7. o handle the 80hz setting without strain Power switch The master power switch is located on the right half of the unit This rocker style switch is the main on off for the unit This switch should be set to position 1 for on up O for off down Detachable power cord available on some versions Allows for easy replacement should the original be damaged Line level connection Figure 1 shows connection to a pre amplifier s main outputs and returning them to your amplifier inputs When installed in this fashion your satellite speakers will be crossed over at 80 100hz which removes the lower bass from your amplifier and speakers enabling them to do a better job reproduc ing high frequencies By utilizing this method you will have a bi amplified system gaining improved power and headroom for your system Figure 1 Installation using line level line in inputs PBERIES Nahe Soe om AMPLIFIER MAIN OUTPUTS MAIN INPUTS MAIN OUTPUTS RIGHT LEFT RIGHT LEFT RIGHT LEFT TO SATELLITE SPEAKERS A word about subwoofer outputs The Velodyne subwoofer is designed to operate using the full range audio signal for input when using the built in crossover Some surround sound processors receivers including the Dolby AC3 sys tem with there 1 channel outputs have a subwoofer out jack that is already crossed over and designed to be used with a conventional amplifier and speaker Combining both an external crossover
8. s amp outputs Speaker level inputs amp outputs with 5 way binding post connec tions Signal sensing auto turn on off with bypass option Variable volume control Variable phase control 0 to 180 degrees Two position audio video listening selection switch 3dB video Response 22 hz to 120 hz 3dB Detachable power cord available on some versions Magnetically shielded for video use Dual staggered low pass crossover 12dB octave initial 24dB octave ultimate l Gain compression circuit to protect woofer from over excursion Input overload protection Thermal power sensing to protect woofer s voice coil from burnout Power on LED green Installation Your new VA 1215XII subwoofer system provides for a 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 system power turned off Inputs Your new VA 1215XII subwoofer is equipped with both speaker level and line level inputs Use the LINE IN jacks when connecting your subwoofer to a pre amp signal processor or line level cross over The FROM AMPLIFIER jacks connect directly to the speaker outputs of a integrated amplifier or receiver Your amplifier section will notice no additional loading effects when you use these inputs because of their high impedance Note Do not use both LINE IN and
9. s and turn off the unit after several minutes when there is no longer any signal at the inputs If you plan to leave the VA 1215XIl unused for an extended period of time we recommend that you turn off the unit by the master power switch on the rear panel i Troubleshooting amp Service Before seeking service for your VA 1215XIi subwoofer please re check all systems Following is a simple troubleshooting guide to assist you Verify unit is plugged in and power outlet used is active Is power switch on Is auto turn on off set properly Is unit receiving an input signal from your source Have all controls on subwoofer volume crossover phase etc been properly set If unit has been running at high levels one of the protection circuits may be engaged Has the built in amplifier overheated Has the speaker s voice coil started to heat up ap ON gt D If the protection circuitry is active the unit may cycle on and off until operating parameters return to normal Under more serious condi tions the unit may shut off completely Normal operation will return upon cooling but you may be required to turn the power off and then on again to reset the unit The following conditions require service by a qualified technician 1 The power cord has become damaged 2 The unit does not appear to operate normally or exhibits a marked change in performance 3 The unit has been exposed to water 4 Some part of the cabinet or circ
10. s radiators heat registers stoves orother subwoofers that produce heat Power Sources The subwoofer should be connected to a power supply only of the type describedin the operating instructions or as marked on the subwoofer Power Cord Protection Power supply cords shouk be routed so that they are notlikely tobe walkedon orpinched by items placed upon or against them paying particular attention to cords at plugs convenience receptacles and the point at which they exit rom the subwoofer Caution To prevent electrical shock match wide blade of plug to wide slot fulty inserted Attention Pour eviter les chocs electriques introduire lame la plus large de la fiche dans la bome corespondante de la prise et pousser jusqu au fond 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 darnaged Objects have fallen or liquid has been spilled into the subwoofer The subwoofer has been exposed to rain The subwoofer does not appear to operate normally or exhibits a marked change in performance 4 The sub
11. the sound from the subwoofer reach the listening position the same time as the sound from the main speakers However if the distance from the listening position to the subwoofer andthe distance from listening position to the main speakers differs the sound from each will reach your ears at a different time This control allows the signal to be delayed up to 180 degrees so the output of the subwoofer will blend in to that of your main speakers without any cancellation Video Audio switch Many listeners prefer an emphasized low end on movie soundtracks This switch sets the VA 1215XII for an additional 3dB of output when in video mode Auto turn on switch The auto turn on switch allows the user to bypass the auto turn on function if desired When set inthe auto mode with main power on the VA 1215XII will turn itself on when an input signal is present If no signal is present after several minutes the unit will shut itself off When setin the on mode the auto turn on off function is bypassed and the unit will be on whenever the main power switch is on High pass crossover switch This switch selects the frequency for the high pass crossover This crossover is functional on both line and speaker level outputs Smaller speakers with limited low frequency output may prefer the continued higher 100hz setting which will reduce the low frequencies sent to them Larger speakers with greater low frequency output may be able t
12. uitry is physically damaged Thank you for purchasing a SPECIFICATIONS Cabinet incl legs Frequency Response High Pass Crossover Low Pass Crossover Amplifier Woofer Magnet Voice Coil Passive Radiator Inputs Outputs Warranty Weight VA 1215xXiIl 18 x 19 1 8 x 20 W H D 22hz 120hz 3 dB 80hz or 100hz 6 dB octave 40hz 120hz 6 dB octave 24 dB ultimate Class AVB 250 watts 500 watts peak 12 forward firing 55 oz 2 15 downward firing Line level amp speaker level Line leve amp speaker level One year parts amp labor 67 Ibs approx Specifications are subject to change without notice FOR YOUR RECORDS DATE PURCHASED DEALER SERIAL NOTE Please complete and return your warranty card within ten 10 days
13. woofer has been dropped or damaged Servicing The user should not attempt to service the subwoofer beyond what is described in the operating instructions paos Alt other servicing should be referred to qualified service personnel Congratulations Congratulations on your purchase of a Velodyne VA 1215XI sub woofer system This system represents the state of the art in accurate low frequency reproduction Read and follow the instruc tions below 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 equipment itself 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 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 Record the serial number in the space provided on the warranty card for future reference Product Features amp Controls 12 forward firing woofer with 2 voice coil amp 55 oz magnet 15 downward firing passive radiator Built in 250 watt RMS power amplifier Adjustable 40 to 120hz low pass crossover with bypass option Selectable 80 or 100hz high pass crossover Line level input
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