Velodyne Acoustics FSX-12 User's Manual
Contents
1. with a crossover circuit of their own such as the new 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 switch Auto On The auto tum on switch allows the user to utilize or bypass the automatic signal sensing circuitry When set in the AUTO mode with main power ON the subwoofer will turn itself on when an input signal is present Ifno signal is present after several minutes the unit will shut itself off When set in the ON mode the auto tun on off function is bypassed and the unit will be on whenever the main power switch is on 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 up for on and 0 down for off Ifthe unit is to be left unused for an extended period of time the master power switch should be turned of 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 85Hz which removes the lower bass 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 g2. If you know subwoofers you know about Velodyne Corey Greenberg Home Theater Technology February 1995 Face Off Comparison of five subwoofers _ the clean full and extended quality of the F 1800R s bass caused me to gasp with the recognition that was finally listening to a real subwoofer our entire listening room swelled with solid satisfying bass as if both musician and instrument were in the room scenes such as the pre battle sequence in Braveheart may very well have threatened the room s structural integrity had we not backed off the volume a bit Al Griffin Home Theater December 1996 Gear Guide 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 8 97 63 FSX12 FSX 12 O wner s M anual Velodyne SERVO CONTROLLED 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 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
3. on the acoustic properties of the listening room Typically the optimum location for a subwoofer is tucked away in a comer of your listening room This location will usually offer the greatest output levels and 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 continued 8 iS
4. aining improved power and headroom for your system The first type of protection circuitry which prevents overdriving of the speaker or amplifier operates constantly without being audible under most situations In some extreme situations sustained high output levels the unit may shut down momentarily The green power led may also blink rapidly This indicates operation of the thermal protection circuitry If this should happen you should reduce the volume setting or shut the unit off until normal operating conditions retum You may also want to plug the unit into a different wall outlet as dropping power line voltage will be most noticeable under strenuous conditions Distortion in loudspeakers Nonlinear distortion is a problem which plagues all speakers This particular type of distortion is a common 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 When a single tone is applied to a nonlinear system the result is harmonic distortion In which some of 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 a reasonable amount for speakers This means that 3 of the total energy leavin
5. alert the user to the presence of important operating and maintenance servicing instructions in the literature accompanying the subwoofer TRO N D 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 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 cart 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 on a 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 situated away from heat sources such as radiators heat registers stoves or other subw
6. at will automatically tum on the unit when a signal is present at the inputs and tum 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 tum off the master power switch on the rear panel continued 12 woofers actually add to the 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 FSX 12 produces sound in the same manner as conventional loudspeakers a cone shaped piston is forced to move by means of a linear motor composed of a coil situated between the poles of a very strong permanent magnet In our F series products however a feedback mechanism is provided to link the driver to the amplifier creating a control system loop At the heart of this control system is a low mass accelerometer rigidly attached to the voice coil The accelerometer continuously monitors cone motions providing us with a feedback signal for the servo control circuitry This high gain system is designed to improve linearity and reduce distortion approximately 30 times over conventional non servo systems While the input signal is being sent to the class AB amplifier which powe
7. efeatable Variable volume control Selectable phase control 0 or 180 Frequency response of 20Hz 120Hz 3dB Multiple staggered low pass crossovers 12dB octave initial 48dB octave ultimate Gain compression circuit prevents over excursion amp amp clipping Power on amp protection indicator LED green Installation Your new Velodyne servo subwoofer 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 subwoofer is equipped with speaker level and line level inputs Use the LINE LEVEL jacks when connecting your subwoofer to a pre amp signal processor line level crossover or receiver with pre amp level outputs The SPEAKER LEVEL jacks connect directly to the speaker outputs of any amplifier integrated amplifier or receiver Your amplifier section will notice no additional loading effects when you use these inputs due to their very high impedance 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 your new subwoofer may be left on continuously without any problems The unit is equipped with a signal sensing turn on off th
8. en 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 new Velodyne subwoofer using the line level connections you should always use shielded phono cables There are many decent cables available today most any of which will work perfectly well We do recommend that you keep the length of cable as short as possible to avoid any potential noise problems Figure 2 Installation using speaker level from amplifier inputs MAIN OUTPUTS speaker level INTEGRATED AMP RECEIVER SATELLITE SPEAKERS When using speaker level connections use a decent quality speaker cable that mates well with the connectors Be very careful to avoid any loose strands or frayed wires which may result in a short which may damage your equipment Cables of extremely large size are typically not required Extremely large gauge wire may not properly fit in the binding posts resulting in a poor connection and possible short circuits Placement True subwoofers operate at extremely low frequencies which are primarily omni 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 Keep in mind that frequency response and output level can be drastically influenced by placement depending
9. g The user should not attempt to service the subwoofer beyond what is described in the operating instructions All other servicing should be referred to qualified service personnel SPECIFICATIONS Cabinet h w d Frequency Response Harmonic Distortion High Pass Crossover Low Pass Crossover Phase Amplifier class AB Woofer Magnet Magnet Structure Voice Coil Inputs Outputs Warranty Weight approx FSX 12 18 x 16 5 x 15 20Hz 120Hz 3 dB lt 1 typical Passive 85Hz 6 dB octave slope 40Hz 120Hz 12 dB octave initial 48 dB octave ultimate O 180 120 W RMS 265W peak 12 forward firing 75 oz 4 6 Ibs 170o0z 10 5 Ibs 2 5 diameter Line level amp speaker level Line level amp speaker level Two years parts amp labor 60 Ibs 27Kg 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 14 Troubleshooting amp Service Ifyou 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 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 sub
10. g the speaker is at frequencies other than the intended input signal 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 is a typical output level obtained in many systems particularly home theater systems Even at 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 continued 10 t locations when possible When using a pair of Velodyne subwoofers in stereo it is 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 compressed in any way that could result in damaging the insulation or wire Regardless of where you install
11. nternal crossover in either the processor or Velodyne subwoofer In some installations simply setting one crossover to a higher frequency such as 120 Hz will restore maximum performance To bypass the subwoofer s internal crossover when the unit is being fed a low 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 Figure 1 Installation using line level inputs pa Velodyne i ROM AMI aes aa 2 PRE AMP AMPLIFIER MAIN OUTPUTS MAIN INPUTS MAIN OUTPUTS RIGHT LEFT RIGHT LEFT RIGHT LEFT TO SATELLITE SPEAKERS continued 6 ws Note If not using an external crossover you should use the built in crossover for optimal performance Spea ker level connection Figure 2 shows an easy way to connect your Velodyne subwoofer directly to your receiver or integrated amplifier When connected in this fashion your satellite speakers will be crossed over at 85Hz which removes the lower bass from your speakers 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 Caution To avoid damage to your main amplifier be sure to maintain correct polarity wh
12. oofers 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 plug to wide slot fully inserted Attention Pour eviter les chocs electriques introduire lame la plus large de la fiche dans la borne correspondante 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 damaged b Objects have fallen or liquid has been spilled into the subwoofer c The subwoofer has been exposed to rain d The subwoofer does not appear to operate normally or exhibits a marked change in performance e The subwoofer has been dropped or damaged Servicin
13. rs the driver a continuous signal representing cone motion is sent back to a comparator circuit This circuit constantly adjusts for any deviation between the input signal and the subwoofer s output This self regulation results in extreme control over cone movement and very accurate low distortion sound At typical listening levels these servo controlled units produce less than 1 harmonic distortion with input signals extending to 20Hz and below Far better than conventional designs currently on the market This combination provides you with the best combination of clean deep accurate bass without making any sacrifice to distortion 11 gt Important Do not use both LINE LEVEL and SPEAKER LEVEL connections simultaneously Volume control This control allows you to balance the output from the subwoofer to the main speakers amplifier in your system This control should he set to achieve similar output level from both the main speakers and subwoofer when listening to music The remote may then be used for minute temporary adjustments such as increasing the volume for home theater usage A good starting point for the volume control is 3 or 4 dots from minimum Low pass crossover 40 to 120Hz All inputs sum the left and 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 respon
14. se from 40 to 120Hz 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 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 subwoofers output signal 180 to correct for any possible mismatch amp resulting cancellation between the subwoofer and your main speakers amplifier To adjust simply listen to the system with music playing Then move the switch from one position to the other and listen for a change in low frequency output The correct position will have a greater amount of apparent low frequency output continued 4 i Subwoofer Direct switch In Out This switch allows the electronic crossover circuitry to be removed from the signal path This is required in certain installations which route the signal through external processors
15. woofer volume crossover phase etc been properly set Is the mute on the remote control engaged Are both volume controls properly set If unit has been running at high levels for an extended period of time one of the protection circuits may be engaged Has the built in amplifier overheated e Is your power line voltage sagging under heavy use Ifthe protection circuitry is active the unit may cycle on and off until operating parameters retum to normal Protection circuit operation is usually indicated by a blinking power led Under more serious conditions 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 circuitry is physically damaged Thank you for purchasing a Velodyne 13 nS Congratulations Congratulations on your purchase of a Velodyne servo controlled subwoofer system This system represents the state of the art in accurate low frequency reproduction We believe these units to be some of the finest sounding subwoofers available When properly cared for this exceptional subwoofer will provide you with years of unparalleled listening pleasure Enjo
16. y 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 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 This unit is extremely heavy Use caution when lifting of 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 a moment to record the serial number and date location of purchase in the space provided on the warranty card for future reference Note Do not move unit while power is on You may damage the Servo Control circuitry continued 2 E Product Features amp Controls e 12 subwoofer with 2 1 2 voice coil amp 750z magnet e Built in 120 watt RMS class AB amplifier e Accelerometer based servo control system for extreme accuracy e Adjustable 40 to 120Hz low pass crossover defeatable 85Hz high pass crossover outputs Line level RCA inputs amp outputs Speaker level inputs amp outputs Signal sensing auto turn on off d
17. your Velodyne subwoofer it must remain in an upright position woofer facing forward Using shipping or otherwise storing the subwoofer in any other position for an extended period of time may result in damage to the unit not covered by warranty The FSX 12 subwoofer is not magnetically shielded When installing near television monitors test placement with the monitor operational to observe any change in colors 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 greatest reliability The unit is protected against 1 Overdriving the speaker or amplifier 2 Overheating the amplifier 3 Excessive drop in power line voltage Subwoofer outputs The Velodyne subwoofer is designed to operate using the full range audio signal for input when using the built in crossover Some processors receivers have a subwoofer out jack that is intemally filtered and designed to be used with a conventional amplifier and speaker In some rare cases combining both an external 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 i
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