10s Manual
Contents
1. Adjustment range is from 30dB to 6dB Factory preset gain is 6dB You may need to adjust this to match the level of your monitors Low Pass Frequency Adjustment Low Pass Frequency adjustment is ES performed through a coninuously o variable adjustment The range is from 50Hz to 130Hz If you are using the Subwoofer Line Outs for the monitors you will want to place this at the 80Hz position see additional information in the Installing Your Monitors section 80Hz Phase Switch Functionally the Phase switch is a polarity inversion mechanism whose position affects the phase relation of the subwoofer output to the other speakers in your room The proper switch position of 0 or 180 degrees depends on a number of variables These variables include the distance of the subwoofer from the listening position and monitors as well as the system s absolute polarity and the bass response of the room refer to the Subwoofer Setup and Placement section in order to determine the correct switch position for your monitoring system and room Using the Ground Lift Engaging the ground lift switch can sometimes reduce ground loop noise in your system By providing an AC mains ground on the KRK10s and proper installation in a quiet studio environment the system is happily quiet However noise will be induced if the monitor is installed in less than desirable settings i e audio cables run alongside power cables behind refrigerat2. at all then the tweeter probably needs to be replaced e Once you have a better idea of what may be at fault then call us and speak with someone in the service department They will help you determine the best solution to correct your unit The service department can be reached at 954 316 1580 Here are some suggestions that will help you eliminate these undesirables from your system e Make sure that the power cord is plugged snugly into the IEC socket on the rear of the unit e Check the connections between the signal source and the unit The sub and monitor s XLR and TRS connectors are a completely balanced system If you re connecting an unbalanced output to the monitor be sure that you re using Pin 2 for signal and have Pin 1 and Pin 3 tied together at the source end e Refer to the Connecting Your System section on page 6 of this manual to ensure that the AC mains is matched to the operating voltage requirements e All audio equipment should use the same ground point Check all other devices using the same AC output in the building such as dimmers neon signs TV screens and computer monitors These devices should not be using the same circuit Please read the warranty card that was included in the shipping carton of your subwoofer prior to sending it back to KRK Systems LLC All products in need of repair can be returned to the dealer where they were purchased or to KRK Systems LLC Before shipping your unit back to KRK for servic
3. off and check the A C mains fuse s NEVER USE A LARGER AMPERAGE FUSE THAN IS SPECIFIED Turn the power switch back on The power light should illuminate e Note If a fuse change was needed and the AV mains voltage is set correctly yet upon powering the unit back up the fuse s blow again the product needs to be returned to the dealer you purchased it from or to KRK for servicing Repeat the steps in the Troubleshooting section above before continuing to the next steps Check to see if all other audio devices using the same AC outlet are still operating Make sure that e The audio source cable is plugged into both the source output and the unit s input e The System Gain pot is turned up fully clockwise 6dB e The signal source e g mixing console work station CD player etc is turned up to a level that can properly send a signal to the monitors If one of the full range monitors is working then exchange the audio input cable from the non working monitor to the working unit This will determine whether it s really the monitor a faulty cable or some other glitch in the audio chain If the unit is still not responding it should be returned to the dealer that you purchased it from or to KRK for servicing Turn the unit s send down or off Repeat the steps in the Troubleshooting sections above before continuing to the next steps Carefully check to see if the amplifier s back plate is hot If the unit has been runnin
4. KRK10s SUBWOOFER USER GUIDE IMPORTANT SAFETY INSTRUCTIONS A CAUTION ATTENTION A POUR VITER LES ep oes INTRODUIRE LA LAME LA PLUS LARGE DE LA FICHE DANS LA BORNE CORRESPONDANTE DE LA PRISE ET POUSSER JUSQU AU CAUTION TO REDUCE THE RISK OF ELECTRIC FOND SHOCK DO NOT REMOVE COVER OR BACK NO CAUTION USER SERVICEABLE PARTS INSIDE REFER SERVICING TO PREVENT ELECTRIC SHOCK MATCH WIDE BLADE OF TO QUALIFIED SERVICE PERSONNEL PLUG TO WIDE SLOT FULLY INSERT Warning To reduce the risk of fire or electric shock do not If an indoor antenna is used either built into the set or installed expose this unit to rain or moisture separately never allow any part of the antenna to touch the metal rts of other electrical appli h I TV set etc The lightning flash with an arrowhead symbol within an equilateral ES triangle is intended to alert the user to the presence of uninsulated CAUTION dangerous voltage within the product s enclosure that may be of POWER LINES sufficient magnitude to constitute a risk of electric shock to persons Any outdoor antenna must be located away from all power lines The exclamation point within an equilateral triangle is intended to y OUTDOOR ANTENNA GROUNDING alert the user to the presence of important operating and If an outside antenna is connected to your tuner or tuner maintenance servicing instructions in the literature accompanying Preamplifier be sure the antenna
5. NA GROUND CLAMPS GROUND WIRE bookcase or cabinet that may impede the flow of air through its O DISCHARGE ventilation openings POWER SERVICE GROUNDING gt ie Su The unit should be situated from heat sources such as radiators fe s interior metal water pipe BONDING JUMPER Y WIRES TO EXTERNAL heat registers stoves or other devices including amplifiers that e TERMINALS produce heat Y OPTIONAL ANTENNA GROUND i ING ELECTRODE The unit should be connected to a power supply outlet only of the e te voltage and frequency marked on its rear panel SEENON SIZIN The power supply cord should be routed so that it is not likely to be NOTE TO CATV SYSTEM INSTALLER This reminder is pie oe eee P wena pug conventenee provided to call the CATV system installers attention to ate a Article 820 40 of the National Electrical Code that provides Unplug the unit from the wall outlet before cleaning Never use asi A A h benzine thinner or other solvents for cleaning Use only a soft guidelines for proper grounding and in particular specifies damp doth that the ground cable ground shall be connected to the The power supply cord of the unit should be unplugged from the grounding system of the building as close to the point of wall outlet when it is to be unused for a long period of time cable entry as practical Care should be taken so that objects do not fall and liquids are not DO NOT ATTEMPT SERVICING OF THIS UNIT nes we YOURSELF REFER SER
6. VICING TO QUALIFIED is unit should be serviced by qualified service personnel when A The power cord or the plug has been damaged or SERVICE PERSONNEL B Objects have fallen or liquid has been spilled into the unit or Upon completion of any servicing or repairs request the service C The unit has been exposed to rain or liquids of any kind or shops assurance that only Factory Authorized Replacement Parts D The unit does not appear to operate normally or exhibits a with the same characteristics as the original parts have been used marked change in performance or and that the routine safety checks have been performed to E The device has been dropped or the enclosure damaged guarantee that the equipment is in safe operating condition REPLACEMENT WITH UNAUTHORIZED PARTS MAY RESULT IN FIRE ELECTRIC SHOCK OR OTHER HAZARDS KRK s industry leading line of studio monitors and subwoofers provide a level of precision and performance unheard of in monitor systems Your KRK10s subwoofer features several key design elements that have come to be recognized as the studio standard for the world s finest engineers producers and musicians Your KRK subwoofer delivers world class performance at a price that makes this a truly uncommon value Introduction usina orgia ie aides Diced wk as 1 UNPACKING lt lt cen aire seGee ea EEE ee 2 KRK Systems Design Philosophies 00ooooooooooorrrrrnn 3 SYSteMCONHONS oes theta eda a AA ee 5 Con
7. ain monitors either stereo or 5 1 surround without exaggerating bass response in the room Improper set up may cause an exaggeration of bass response in the room which in turn may cause the engineer to mix in less bass energy than desired There are some basic steps necessary to ensure you have a subwoofer operating in top form 1 a room correction system such as KRK s ERGO and or room treatment 2 proper placement of the sub within the room and 3 proper electrical settings Proper Physical Placement of Subwoofer Just because bass frequencies are largely non directional does not mean that you can ignore the subwoofer s placement in the room If fact a sub s physical position in the room in relation to the floor walls and other surfaces radically influences its bass response In a monitoring situation it is desirable to place the subwoofer so that it produces the smoothest frequency response at the listening position In addition since the subwoofer s output will interact with the other monitor speakers in the room it is important to consider the subwoofer and near field speakers as a total system At this stage you have only the subwoofer operating Once you find its optimum position and settings you can turn on the complete monitoring system to verify that all components interact properly What you are attempting to do is find a place in the room where the subwoofer interacts smoothly with the acoustics to even out the bass response
8. assed allowing full bandwidth to run to the monitors while muting the sub This allows you to evaluate the impact of the subwoofer on your mix Plug in a standard quarter inch mono latching footswitch to the female quarter inch connector on the back panel Any standard latching quarter inch mono footswitch such as the Boss FS 5L should be compatible 10 This is a bit more involved than a stereo hook up since there are now six speakers involved as well as something called Bass Management see the Bass Management Theory section Notice from Figure 3 that for professional use a separate 6 channel level control box is required between the mix down deck and the monitor speakers This is because few small format mixing consoles have provisions to switch and level manage a 6 channel audio signal The simplest and perhaps best way to accomplish this is to use an external 5 1 level controller It is placed between the outputs of the mix down deck and the monitor speakers allowing it to control the playback level while the mix down deck receives full level recording signal Console Outputs Left Front Right Front Left Surround Right Surround Center LFE Doccocco Figure 3 11 Beyond Stereo to 5 1 Surround When using a subwoofer for the LFE Low Frequency Effects channel in a 5 1 surround monitoring system rotate the low pass filter all the way to the ri
9. at the listening position Once you find the optimal spot place the subwoofer there and listen to it from the mix position Move the subwoofer around a foot at a time until the bass response is as even as possible at the listening position Remember that you do not want any single frequency to be exaggerated during monitoring as that will result in the final music mix having too little bass One caveat if your subwoofer s optimum position is under your console make sure to leave the removable grill on the subwoofer to protect the speaker from your feet You do not want to kick a hole in the subwoofer speaker Continue to the next section Setting Subwoofer Levels in order to determine the proper position of the phase switch on the subwoofer Setting Subwoofer Levels Once the subwoofer is in position its level needs to be matched with the near field monitors For stereo systems the process is straightforward Obtain a SPL Sound Pressure Level meter If you will be using the internal high pass filtered outputs from the subwoofer to the near field speakers set the low pass filter on the KRK subwoofer back plate to 80Hz Now route 1 octave wide band pass pink noise to the monitor system which will be sent to the main speakers through the subwoofer or bass management filters A good choice is 500 to 1 000Hz band passed pink noise which is within the fundamental frequency range of many vocalists and minimizes high frequency problems but doe
10. at when making voltage changes the fuses will have to be replaced refer to the Changing Fuses section below Changing Fuses Under normal operation the fuses should not blow A blown fuse usually indicates an overload or fault condition To change the fuse remove the power cord pry off the fuse block with a small flathead screwdriver and change the blown fuses Refer to the Specifications section for fuse current ratings NOTE If the fuses blow immediately upon power up this indicates a fault condition and the monitor should be returned to KRK for repair Audio Inputs The XLR and TRS are 4 dBu balanced inputs whereas the RCA inputs are 10 dBu unbalanced TRS 1 4 Connectors XLR RCA Inputs Connectors Audio Input WF G 10k Ohms Balanced E Pin 2 Tip High UNBALANCED Pin3 Ring Low Pin Unbalanced Balanced 1 Sleeve Ground KRK subwoofers include a built in crossover and amplifier so you only need the appropriate hook up cables to integrate it into your existing monitor system First you ll need to connect a pair of cables from the stereo monitor outputs of your console or audio hardware device to the left and right XLR 1 4 or RCA input jacks on the subwoofer Next if you are using the internal 80Hz high pass filter built into the subwoofer for the existing full range monitors and most of you will hook the XLR 1 4 or RCA output jacks on the subwoofer to the line level inputs of y
11. bwoofer is out of warranty and you would like a quotation before servicing your product please include a note with your contact information on it and we will contact you with a service quote Service will be performed once your method of payment has been established and approved e For service or replacement part quotes call KRK Customer Service at 954 316 1580 Thank you for purchasing the KRK10s active studio subwoofer We are the most dedicated monitor company in the world and we are thrilled you have joined our ever growing family of loyal customers Our Focus is Your Mix At KRK our focus has always been to make the most accurate studio monitors available at any price We don t offer PA gear mixers or motorcycles just the tools you need to deliver a great mix From the legendary Expos Series to VXT to the new RoKit Generation 2 G2 series we know recording monitors We do not add sonic characteristics like some other manufacturers that make their monitors appear to provide more SPL or add low frequencies that demo well in the store When you use a KRK monitor you can be confident that your mixes will translate well to the wide variety of playback conditions that can occur in the real world We want your audio mixes to sound good everywhere not just in your studio Port Design Our ports are designed to greatly reduce air flow turbulence for high performance audio reproduction The result Clear accurate and we
12. e you must acquire a Return Material Authorizaion RMA from KRK Your unit will not be received by the company nor will any work be done on your unit without this number Please call KRK at 954 316 1580 to request your RMA e For the safest possible return to KRK please use the shipping carton and packaging in which your monitor was originally shipped e KRK cannot be responsible for any damages incurred during the shipping process due to poor packing Make sure to insure your shipment e If your subwoofer is out of warranty and you would like a quotation prior to servicing your product please call for a RMA number No service will be performed on your unit without this number e For replacement part quotes please call 954 316 1580 17 Frequency Response SPL Low Frequency Driver Cabinet Dimensions HxWxD Net Weight each AMPLIFIER Power Rating Signal to Noise T H D Input Impedance Balanced Unbalanced CROSSOVER Line Out High Pass Subwoofer Low Pass Filter FUSE 5mm x 20mm 100V 120V 220V 240V FEATURES KRK10s 34Hz 50Hz to 130Hz Variable 1 5dB 110dB Music and 113dB Peak 10 High Excursion Glass Aramid Composite Woofer 15 x 14 x 16 1 16 38 2 cm x 35 5 cm x 40 8 cm 40 2 lbs 18 24 kgs 150W RMS 98dB 08 10kohm 10kohm 80Hz Fixed 50Hz 130Hz Variable 4 0A 250V Slow Blow 2 0A 250V Slow Blow XLR amp 1 4 TRS Connectors RCA Connector IEC Mains Con
13. g at highest power output for an extended period of time it could be that it has become overheated and the protection circuitry has shut the system down momentarily The unit provides maximum circuitry protection against AC power surges amplifier overdrive and overheating of the amplifiers Turn the unit off then wait 30 minutes to allow the back plate to cool down Turn the power switch back on Increase the volume to check for normal operation If the unit is still not responding it should be returned to the dealer that you purchased it from or to KRK for servicing e Repeat the steps in the Troubleshooting section above before continuing to the next steps e Disconnect the signal cable at the unit s input With power on place your ear close to each driver tweeter woofer and listen for noise i e a slight hiss or hum If there s absolutely no sound whatsoever it could be that one or more of the drivers woofer tweeter or both is at fault It s also possible that the problem lies somewhere in the electronics e Play some non distorted source material at a low volume Carefully cover the tweeter to block the sound without touching the diaphragm Is the woofer producing a clean sound If there is not a clear tonal quality or any sound at all then the woofer probably needs to be replaced e Cover the woofer so you can hear mostly the tweeter Is the tweeter producing a clear sound If there is not a clear tonal quality or any sound
14. ght to the 130Hz position Note that the LFE channel is set with an additional 10dB of monitoring gain To set this level we recommend using 2 octave wide band passed pink noise from 20 to 80Hz for the LFE channel and 500 to 2 000Hz for the near field speakers After adjusting each near field monitor one at a time to 85dB SPL adjust the LFE channel 10dB louder to 95dB SPL Center SPL Meter Figure 4 12 Bass management is a method for extending the bass response of small near field speakers used in 5 1 surround sound systems familiarly called home theatre systems This is done by routing frequencies below a cutoff point to a separate subwoofer sometimes called bass redirection in home theater receivers This can usually be enabled by selecting Small Speakers from a speaker set up menu This process places a group of two way filters in the speaker output path typically at 80Hz These filters route all sonic energy above this given frequency e g 80Hz to the Left Center Right Left Surround and Right Surround speakers In turn the process redirects the low frequency energy from the five full range channels to a single subwoofer which also reproduces the separate LFE channel Bass management is used in practically every consumer home theater system Therefore audio engineers mixing for modern listeners should realize that their studio monitoring systems must be able to reproduce sufficient low frequenc
15. ies so they can avoid recording undesirable subsonic information Without such studio monitoring it is possible to release a mix with infrasonic problems such as pops air conditioner rumble traffic noise footsteps etc These subsonic noises will be eliminated masked by the natural high pass filter effect of using near field monitors with a response that goes down only as low as 40 or 50Hz Thus infrasonic problems may not be recognized heard in the studio However since virtually all home theatre systems use subwoofers with bass management consumers will hear these infrasonic problems at high volume levels in their home Bass management effectively extends the low frequency response of near field monitors down well into the 25 to 40Hz range depending on the subwoofer used This allows the engineer to take evasive action in the studio such as engaging high pass filters on input channels and microphones adding pop filters and suspension mounts to microphones and correcting HVAC and other rumble problems 13 The subwoofer grill can be removed and the grill s rubber gasket can be reinserted to show off your KRK10s woofer However if you place your subwoofer in proximity to your feet we highly recommend leaving the grill on to protect the speaker To Remove the grill and replace the grill s rubber gasket follow these directions 1 Take a paper clip and bend a tight hook into the paper clip You want a short hook to insert
16. into the grill 2 Insert the hook end of the paper clip into the gill near the edge and gently pull the grill toward you 3 As you see the grill start to separate repeat this procedure around the grill edge until you can easily pull the grill away from the cabinet 4 Once you remove the grill pull the grill s rubber gasket away from the grill 5 Now insert the grill s rubber gasket into the groove in the cabinet that the grill came from so that the back of the gasket is facing out This will give you a seamless edge to the gasket so that it fills the grill s groove in the cabinet 6 Store the grill in a safe place in case you want to reinstall it later 14 If you re having trouble check out these tips The power cord is plugged into both the IEC socket on the rear panel of the unit and into the AC mains The AC mains voltage is matched to the operating voltage requirements see Changing Voltage in the Connecting Your System section on page 6 If the AC mains voltage is higher than the selected voltage it is possible that the fuse needs to be replaced see Changing Fuses in the Connecting Your System section on page 6 The power light is illuminated on the front panel of the monitor or on the back panel of the subwoofer Note that with the the new Rokit series Generation 2 or the VXT series the logo illuminates on the front panel to indicate that power is on If the power indicator is not on turn the power switch
17. ll designed low frequency extension Even More Accurate than Before We tweaked our speaker voicing to provide even more accurate frequency response for amazing audio reproduction using our custom made KRK drivers What you hear is what you get where ever your music is being played Our drivers are all custom designed by our world class studio monitor engineering team Imitation but not Perfection A Statement to our Competition If the sincerest form of flattery is imitation we must own that aspect of the recording monitor world From using Kevlar in driver designs to copying our radiused edge approach the competition knows a good thing when they hear it However chasing our past won t deliver a product that comes close to the sound of a KRK monitor See ya later competition Enough About Us Let s Get Going So enough about why we do the things we do Let s read on about the features of your new KRK subwoofer so you can start enjoying your new subwoofer now KRK provides a standalone high performance room correction system called ERGO ERGO provides the ability to use up to two subwoofers with dedicated crossover functionality and delay compensation For more information about using ERGO with your monitoring system please visit our website at http www krksys com product_ergo php Volume The input sensitivity is adjusted counterclockwise reduces sensitivity with the rear panel 30dB 6dB VETE mounted Volume control
18. necting YOUr SYStEM inssi ira Pte dds map ees Soe Se Ane aoe Genin arms Sawa 6 Hooking Up Your Subwoofer Stereo Systems 0 00 cee eee ee 7 Subwoofer Placement and Set Up 2 ee 9 Hooking Up Your Subwoofer 5 1 Surround oooooccoo eee 11 Bass Management Theory 2 0c cece eee eee eee ence eee 13 Removing the Subwoofer Grill ooooooooooooooomooooooos 14 Troubleshooting e iia a A A Rae 15 Specifications kacer a a di ae 18 Congratulations Welcome to the latest KRK subwoofer series which includes the KRK10s This KRK subwoofer series provides even better performance and accuracy raising the bar once again above the competition We aren t the new standard We have always been the standard among the world s finest engineers producers musicians and DJs This manual is intended to inform you of the many features of your new KRK subwoofer and its operation We encourage you to take a few minutes to familiarize yourself with the information in this manual Thank you for choosing KRK SAFETY For your safety and to ensure correct operation of this product please take a moment to read the IMPORTANT SAFETY PRECAUTIONS section CAUTION Never remove the rear panel of the subwoofer To do so could result in electric shock A qualified technician should perform any repair or service to the electronics This product is capable of producing sounds at a volume that could potentially be damaging to hearing and resul
19. nector System Volume Control LED Power Indicator Subwoofer Line Out Bypass Switch Variable Low Pass Adjust Ground Lift Switch 18 Notes Notes www krksys com Our mission is to innovate design and deliver superior audio products that form the bridge between an artistic vision and a realized dream LITK00043 4 3 2009
20. ors near florescent lighting older buildings with bad wiring or with certain equipment with lots of RFI lap top supplies PCs generator supplied AC lines This is because there is a ground loop through the sub panel mains wiring source and back to the subwoofer on Pin 1 of the Audio inputs Ground currents traveling through this loop impose different voltages along the path at different gain stages within the circuitry thus creating noises LIFT GND The Ground lift switch does not affect the AC mains panel safety ground It does not open the connection thru Pin 1 to the panel but increases the resistance from zero ohms to one thousand ohms to reduce the ground current and induced noises Safety is not affected IMPORTANT All connections should be made all fader and controls should be set at their minimum levels and all other equipment should be powered prior to powering up your KRK10s subwoofer If you are connecting the sub s Line Outs to your monitors turn monitor power on after the subwoofer NOTE Ensure that the voltage indicator found in the voltage selector is set to the correct voltage setting for your local supply Powering On The power On Off switch is located on the rear panel The triangle in the KRK logo on the rear plate illuminates when power is applied Changing Voltage To change the voltage remove the power cord and slide the voltage selector to the desired voltage setting Please note th
21. our full range speaker XLR Connector Pin 1 ou Sleeve Sleeve Ring On Stereo Plug 1 4 Mono Phono Plug Pin 3 or Sleeve On Mono Plug Ring Sleeve 1 4 Stereo Phono Plug TRS Tip Ring Sleeve Subwoofer Hook Up with Active Monitors If you are using active powered monitors simply use an XLR 4 inch Phono or RCA cable to connect the output of the subwoofer directly to the input of the monitor The output marked Left should go to your left monitor and the output marked Right should go to your right monitor Self Powered Speakers Mixing Console with TRS or XLR Monitor Outputs From Console Master Outputs Figure 1 Subwoofer Hook Up with Passive Monitors If you are using passive non powered monitors that require an external amplifier connect the two outputs of the subwoofer to the inputs of the stereo monitor amplifier Typically this would also be a XLR connector but if need be you can use the other connections providing the amplifier will accept them at the amp input Connect the power amplifier to the speakers as you normally would Do not attempt to hook the speaker output of the monitor amplifier to the input of the subwoofer By doing so you run the risk of damaging the equipment Mixing Console with TRS or XLR Monitor Outputs Amplifier From Console Master Outputs Figure 2 A properly set up subwoofer system extends the bass response of the m
22. sn t excite the subwoofer Set this to a comfortable monitoring level typically 85dB SPL using the C response curve on the SPL meter Next route 1 octave wide band passed bass pink noise to the subwoofer via the same filter path A good noise choice is 35 to 70Hz which is below the 80Hz frequency of the subwoofer high pass filter but sufficiently high enough that most subwoofers will have adequate response in that band Set the gain of the subwoofer level control until it matches the same 85cB SPL level Turn up the low pass filter control on the subwoofer to 130Hz This allows the bass energy between the near field monitors and subwoofer to overlap While listening to it from the mixing position route pink noise with a band pass of 60 to 120Hz to the speaker system Have someone flip the phase switch between 0 and 180 degrees and then back and note which position sounds loudest The loudest position is correct and in phase Now return the low pass filter to the 80Hz position or another frequency if you are using external high pass filters for the near field monitors Your subwoofer should now be properly aligned for phase level and spectral response Using the Bypass Feature Your KRK subwoofer is equipped with a bypass feature which allows you to defeat the sub and provide full range audio to your recording monitors in instances where your Line Outs are being utilized This feature is of great benefit in that the high pass filter is byp
23. system is grounded so as to the product provide some protection against voltage surges and built up static charges Article 810 of the National Electrical Code ANSI NFPA No Do not place this unit on an unstable cart stand or tripod bracket 70 1984 provides information with respect to proper grounding of or table The unit may fall causing serious injury to a child or adult the mast and supporting structure grounding of the lead in wire to and serious damage to the unit Use only with a cart stand tripod an antenna discharge unit size of grounding conductors location bracket or table recommended by the manufacturer or sold with of antenna discharge unit connection to grounding electrodes and the unit Any mounting of the device on a wall or ceiling should requirements for the grounding electrode follow the manufacturer s instructions and should use a mounting a Use No 10 AWG 5 3mm2 copper No 8 AWG 8 4mm2 accessory recommended by the manufacturer aluminium No 17 AWG 1 0mm2 copper clad steel or bronze An appliance and cart combination should be moved with care wire or larger as a ground wire Quick stops excessive force and uneven surfaces may cause the b Secure antenna lead in and ground wires to house with stand off appliance and cart combination to overturn insulators spaced from 4 6 feet 1 22 1 83 m apart E E c Mount antenna discharge unit as close as possible to where lead 1 An apparatus with Class I constr
24. t in permanent hearing loss over an extended period of time IMPORTANT NOTE Unpacking and Visual Inspection Your KRK subwoofer was originally packaged in a specially designed carton with packaging materials designed specifically for this unit Please save these items They should be used when transporting or shipping your subwoofer These will help preserve your warranty Your new subwoofer has been carefully inspected and tested prior to packing and shipping After unpacking your subwoofer carefully inspect it for exterior damage and immediately report any physical damage during transit to your shipping carrier Save the shipping boxes and all packaging materials in case the unit needs to be returned to your local dealer or KRK Systems LLC Please read the warranty card that was included in the shipping carton with your product before shipping to KRK Systems A Return Material Authorization RMA from KRK Systems is required before shipping a product to KRK Systems for repair After obtaining a RMA from KRK Systems all KRK Systems products in need of repair can be returned to the dealer where they were purchased or sent directly to KRK Systems e For the safest possible return to KRK please use the shipping carton and packaging materials that were originally provided with your subwoofer e KRK cannot be responsible for any damages incurred during the shipping process due to poor packing Make certain to insure your shipment e If your su
25. uction shall be connected to in enters house a mains sockets outlet with protective earthing connection d Use jumper wire not smaller than No 6 AWG 13 3mm2 copper 2 Where the mains plug or an appliance coupler is used as the or the equivalent when a separate antenna grounding electrode aonne device the disconnection device shall remain readily is used see NEC Section 810 21 j operable 3 1A fuse is used to US market voltage will be set to 115V before EXAMPLE OF ANTENNA GROUNDING AS PER NATIONAL shipment 500mA fuse is used to European market voltage will ELECTRICAL CODE INSTRUCTIONS CONTAINED IN be set to 230V before shipment ARTICLE 810 RADIO AND TELEVISION EQUIPMENT Read and follow all the safety and operating instructions before connecting or using this unit Retain this notice and the owners manual for future reference All warnings on the unit and in its operating instructions should be adhered to Do not use this unit near water for example near a bath tub washbowl kitchen sink laundry tub in a wet basement or near a swimming pool The unit should be installed so that its location or position does not interfere with its proper ventilation For example it should not be situated on a bed sofa rug or similar surface that may block the SEEN ONCE ventilation openings or placed in a built in installation such as a gt STAND OFF INSULATORS gt SERVICE 7 ENTRANCE CONDUCTORS ANTEN
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