MK Sound MX-150THX, V-125THX Speaker User Manual
Contents
1. uS erras Roa ni 16 12 SPECIFICATIONS iis o RD GRE 16 13 CABINET MAINTENANCE 4 225 artisan ari ck CIF SERI uoa e PY V krE SER Pao 16 WIRING DIAGRAMS FIGURE 1 ONE SUBWOOFER TO A THX 5 FIGURE 2 TWO SUBWOOFERS A THX 5 FIGURE 3 ONE SUBWOOFER TO A SURROUND CONTROLLER NON THX 8 FIGURE 4 TWO SUBWOOFERS TO A SURROUND CONTROLLER NON THX 8 FIGURE 5 ONE SUBWOOFER TO AN OR PREAMP NON THX 9 FIGURE 6 TWO SUBWOOFERS TO AN OR PREAMP NON THYX 9 THX subwoofers page 3 CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN The lightning flash with arrowhead CAUTION The exclamation point within an equi within an equilateral triangle 15 TO PREVENT THE RISK OF ELECTRIC lateral triangle is intended to alert the tended to alert the user of the pres user of the presence of important op ence of uninsulated dangerous volt SHOCK DO NOT REMOVE COVER OR erating and maintenance servicing age within the product s enclosure BACK NO USER SERVICEABLE instructions in the literature accom that may be of sufficient magnitude to PARTS INSIDE REFER SERVICING TO panying the appliance constitute a risk of electric shock to per2. INPUT nw 0 1 0 V Pas 000 TX 11 SE MET ADU siiis ME por ALS stow stow If you have two subwoofers do not use a Y connector to feed both inputs on each subwoofer Connect the interconnect cable to the LEFT MONO INPUT only Run the Left interconnect cable to the Left subwoofer and the Right cable to the Right subwoofer See Figure 2 above 4 THX subwoofers page 6 TESTING THE SUBWOOFER THX MODE Once all of the interconnect cables are in place you are just about ready to plug in the subwoofer Set the LOW PASS FILTER toggle switch to the THX position and the BASS LEVEL toggle switch to the THX position Set the SUBWOOFER PHASE switch to the position If your THX controller has a SUBWOOFER OFF ON switch on its front panel rear panel or remote control set it to ON See the controller s manual for details Plug the subwoofer s AC cord in The red LED on the back panel should illuminate Play some program material that has good bass content through your system Carefully advance the system volume control You should hear the subwoofer operate If you think the subwoofer isn t working walk up to the speaker and listen to it from a distance of a foot or less If you confirm that it is not working unplug the subwoofer and check all of your connections before trying it again If you have a problem that you cannot solve
3. Double check all connections and replace any defective cables THX subwoofers page 15 2 Ifthe midbass range the area of transition between Subwoofer and Satellite or L C R speakers sounds weak See Section 7 PHASING TEST on page 11 Reverse the position of the SUBWOOFER PHASE switch on the back panel of the subwoofer The switch position that gives the most bass is correct 3 f you hear a thump through the subwoofer every time you turn the rest of your audio system on and your subwoofer is plugged in all the time Either the preamp amp receiver or surround sound processor is generating the thump and the subwoofer is reproducing it Contact your dealer or the manufacturer of the other component 4 If you hear a persistent hum or buzz through the subwoofer Because the subwoofer easily reproduces 60 Hz signals the frequency of hum it is often blamed for causing hum that originates elsewhere in the system Always avoid running all speaker wires and RCA interconnect cables near to AC cords and component power supplies Placing wires and cables close to AC lines often results in hum If necessary reroute your cables To identify the source of hum remove all input cables to the subwoofer but leave it plugged into the AC outlet Set the BASS LEVEL switch to the VARIABLE position Carefully turn the BASS LEVEL control up towards the MAX position If you hear hum from the subwoofer it is the source of the hum If
4. WHERE TO PLACE YOUR SUBWOOFER Your subwoofer will deliver excellent performance located virtually anywhere in your room Unless you are next to the subwoofer you will not hear it as a separate source of sound In fact its deep bass will appear to come from your other speakers Therefore there is no need to place your subwoofer either between your Satellite or L C R speakers or in any specific location in the room You can significantly improve and fine tune your subwoofer s performance by experimenting with its placement in the room For more detailed placement information please see Section 8 page 12 Your subwoofer is magnetically shielded so you can locate it close to a television without picture distortion occurring from magnetic deflection of the TV s electron beam Wherever you put the subwoofer you must allow room for ventilation of its heatsink and backplate The subwoofer s power amplifier is mounted on the backplate and it generates heat Therefore 1 Do not place the subwoofer against a wall Leave at least 3 inches clearance for the heatsink 2 Do not place the subwoofer close to baseboard heaters or forced air heating outlets DO NOT PLUG THE SUBWOOFER INTO AN AC OUTLET UNTIL ALL SYSTEM WIRING IS COMPLETE 4 OPERATION WITH THX COMPONENTS CONNECTING THE SUBWOOFER TO A THX CONTROLLER The INPUT RCA terminals on the subwoofer connect it to the outputs of your THX controller All of the input connections and controls for th
5. contact your dealer or the M amp K factory When your system wiring is complete and the subwoofer is plugged into the wall leave it plugged in even when the system is turned off The normal mode of operation for the subwoofer is to remain plugged in 24 hours a day Among other things this means that you don t have to walk over to the subwoofer to turn it on every time you want to use the system DO NOT PLUG THE SUBWOOFER INTO A SWITCHED OUTLET ON ANOTHER COMPONENT IT CAN DRAW UP TO 400 WATTS FROM THE AC LINE IT MUST BE PLUGGED INTO A SOLID AC LINE 5 CALIBRATING THE SUBWOOFER THX On the back panel of the subwoofer three toggle switches allow you to select various modes of operation Two are described here description of the function of the third toggle switch can be found in section 7 SATELLITE amp SUBWOOFER PHASING TEST page 11 OPERATION OF THE LOW PASS FILTER SWITCH THX When using the subwoofer with a THX controller this switch should be set to the THX position When using the subwoofer with a standard stereo system or a surround sound processor that is not THX certified this switch should be set to the 80 Hz 24 dB OCTAVE position The THX mode bypasses the internal crossover of the subwoofer and fixes its gain to a standard setting The THX controller contains the crossover and sets the rolloff point of the signal fed to the subwoofer to 80 Hz with a Linkwitz Riley characteristic OPERATION OF THE BASS LEV
6. the THX controller so that the output of the subwoofer causes the sound level meter to read 75 dB C scale slow mode when that test signal is playing All channels of the THX system should be calibrated to this 75 dB level when using the unit s internal test signal Special Note When calibrating the subwoofer level and only the subwoofer level you will find that the needle on your sound level meter will bounce plus or minus a couple of decibels when measuring the test signal To set subwoofer level read the AVERAGE meter level not the peak level Move around the room as you measure levels so that your measurements account for the room reinforcements and cancellations found at various room locations For details on setting levels with your THX controller see the instructions provided with that unit USING TWO SUBWOOFERS THX SPECIAL NOTE If you havethe V 125THX subwoofer you mustuse two in your system to meet THX requirements If you have the MX 150THX only one is required to meet THX specifications Using two subwoofers in your THX system will give you the ultimate in bass performance It will give you improved bass impact and definition as well as greater output and dynamic range If you locate the subwoofers in different parts of the room you will get a better overall frequency response because the room modes excited by one woofer are complemented by the presence of the other subwoofer Alternately if you stack two subwoofers on
7. you are using two subwoofers it is not necessary to use both inputs on each subwoofer Simply connect the interconnect cable to one FROM PREAMP jack only Run the Left channel interconnect cable to the Left subwoofer and the Right interconnect cable to the Right subwoofer See Figure 4 WIRING WITH THE M amp K LP 1S HP 80 OR VF 80 HIGH PASS FILTERS NON THX The M amp K LP 1S HP 80 and VF 80 High Pass Filters can improve any system that allows its preamp and power amp stages to be separated by filtering the bass fed to the main amp and Satellite speakers These filters will give your system greater dynamic range lower distortion and an increased maximum output To use these filters with an integrated amp or receiver the amp or receiver MUST have back panel RCA jacks labelled PREAMP MAIN OUTPUT and POWER AMP MAIN INPUT There may be a switch or jumper connections between them which you will have to remove If you have any questions about your components contact your dealer or M amp K For non THX systems your subwoofer is optimized for use with the HP 80 High Pass Filter We strongly recommend that you use this filter with any component system that allows for its use When you use this subwoofer with an HP 80 and M amp K Satellites the combination forms a 4th order Linkwitz Riley crossover between satellite and subwoofer The linear phase of this crossover means uncompromised performance with great flexibility in system setup without re
8. you hear no hum or much less hum the problem is in another component or a ground loop For ground loop problems when the subwoofer is plugged into a separate AC outlet try plugging itinto the same outlet as your amplifier or receiver If that doesn t work reverse the polarity of its AC plug If you cannot solve the problem call M amp K or your dealer 5 f you hear an unusual sound from the subwoofer when no signal or music is playing Try removing the input cables as described in Step 4 above If the noise disappears it is coming from another component If it does not go away contact your M amp K dealer or the factory 6 If the subwoofer will not play loud enough AND it is connected to the SUBWOOFER OUTPUT jack on a non THX surround sound processor Make sure that the BASS LEVEL toggle switch is set to VARIABLE Set the BASS LEVEL control to the MAX position If you get bass output but itis not enough then the processor s output level is too low Some surround processors receivers amps have very low output levels from their SUBWOOFER OUTPUT jacks If you do not have enough gain when using the SUBWOOFER OUTPUT jacks on a non THX processor use the processor s PREAMP OUTPUT jacks See Figures 5 and 6 page 9 IF YOU NEED TO REPLACE THE EXTERNAL FUSE First unplug the subwoofer from the wall AC socket Remove the fuse cap Look carefully at the fuse s wire filament inside the glass If it is broken replace the fuse ONLY
9. EL SWITCH THX When using the subwoofer with a THX controller this switch should be set to the THX position The controller sets the output level of the subwoofer so this switch disables the subwoofer s level control For the MX 150THX this position provides the proper sensitivity for when one subwoofer is used in the system For the 125 this position is proper when two subwoofers are used in the system The CALIBRATED level control mark is referenced to the level set by the THX switch On the MX 150THX both levels are identical If you set the MX 150THX switch to VARIABLE and the level control to CALIBRATED its output level is the same as when you set the switch to THX THX subwoofers page 7 For the V 125THX the CALIBRATED level is 4 dB lower than the THX level switch set to THX Set the control to this mark if you have only one subwoofer in the system such as in a very small room On both the MX 150THX and V 125THX the 2 and 4 marks indicate the points where your subwoofer is producing 2 dB and 4 dB more output than the CALIBRATED level SETTING SUBWOOFER LEVEL THX The proper method of setting the level of the subwoofer in THX mode is to use the low frequency pink noise test signal generator built into the THX controller and a sound level meter available from Radio Shack First set the master volume of the THX controller to the 0 or REF position Then set the Subwoofer Output control on
10. FICATIONS MX 150THX V 125THX POWER OUTPUT 150 watts RMS 125 watts RMS AMPLIFIER DISTORTION Less than 0 0396 from 20 to 125 Hz at full output into subwoofer drivers all models INPUT IMPEDANCE 15 Kohms 15 Kohms NOISE better than 90 dB relative to full output all models TYPICAL ROOM RESPONSE 20 125 Hz 3 dB 20 125 Hz 3 db DIMENSIONS H x W x D 23 x 15 1 4 x 19 5 8 18 1 2 x 15 3 8 x 20 1 4 WEIGHT 74 165 54 Ibs 13 CABINET MAINTENANCE The painted black cabinet of your subwoofer has a furniture grade finish that will maintain its attractive appearance with proper care Treat this cabinet as you would any piece of fine furniture Regular cleaning is all that is required Matching black paint can be used if necessary to repair any surface damage 0797MX150THX amp V125THX PM6 THX subwoofers page 17
11. G TEST METHOD TWO First set the toggle switch labelled SUBWOOFER PHASE to the position Then feed wideband pink noise found on test CDs the Wow disc or a pink noise generator through your front channel speakers and your subwoofer You can do this test by listening but it is best to use a spectrum analyzer and look at its display in the mid bass region of 70 125 Hz Then reverse the position of the SUBWOOFER PHASE switch If it is set to the position set it to the position If it was set to the position set it to the position The best way is to have a partner work the switch while you sit in the main listening position and listen Now listen to the same wideband pink noise or look at the spectrum analyzer output in the mid bass region If you hear measure less bass set the SUBWOOFER PHASE switch to the opposite position If you hear measure more bass leave the switch alone the new position is correct This test is necessary because the different distances from each speaker to your ears mean that it is possible that the Subwoofer s output may arrive at your ears out of phase with the Satellites output When this happens the midbass is cancelled Re do this test any time you move any of your speakers or the listening position If you want to experiment move the main speakers or subwoofer towards or away from your listening position in small increments When you hear the best combination of stereo
12. H NON THX CONTROLLER 55555 5554 595354 555999835559988855 999 7 OPERATION OF THE LOW PASS FILTER SWITCH senem nem 4 nrren nennen 7 OPERATION OF THE THE BASS LEVEL 8 WIRING WITH A NON THX CONTROLLER 8 USING THE SUBWOOFER WITH THE M amp K LP 1S HP 80 OR VF 80 HIGH PASS FILTERS 10 TESTING THE SUBWOOFER 10 SETTING SUBWOOFER LEVEL 11 USING TWO SUBWOOFERS 11 7 SATELLITE SUBWOOFER PHASING TEST 555555555595555555955 5555959935559955955599995 3969 11 8 FINE TUNING THE PLACEMENT OF YOUR SUBWOOFER 12 SPECIAL METHOD FOR PLACING THE 0 13 9 USE OF SPIKED FEET WITH MX SUBWOOFERS eren 14 10 TROUBLESHOOTING xcii diceris M co nixa co uin a ed uidi id e OD D e e ndi oris 14 IF YOU NEED TO REPLACE THE EXTERNAL FUSE eee ee eene nennen 15 The 5177 end ads cu IS da Ema kr
13. PASS FILTER iz 24 dBIOCTAVE THX FIGURE 6 WIRING TWO SUBWOOFERS TO AN AMP POWER AMP OR PREAMP WITH ONE SET OF PREAMP OUTPUTS 00 MAIN IN LEFT RIGHT OO PREAMP MAIN OUT LEFT RIGHT PHASE LOW PASS use one Y connector for each channel to split the output of the preamp 24dBIOCTAVE page 9 If your surround processor has only one PREAMP OUTPUT and no SUBWOOFER OUT and you do not have an M amp K High Pass Filter or crossover you must use a Y connector to feed the amplifier and subwoofer See Figure 5 above If you have a surround sound processor with a SUBWOOFER OUTPUT jack use it to feed the subwoofer See Figure 3 on page 8 Some surround processors receivers amps have very low output levels from their SUBWOOFER OUTPUT jacks If you do not get enough bass when using the SUBWOOFER OUTPUT jacks on a non THX processor use that processor s PREAMP OUTPUT jacks instead See Figure 5 above THX subwoofers page 10 To connect the subwoofer run shielded RCA RCA interconnect cables from the outputs on your component to the INPUT jacks found on the subwoofer s backplate See Figure 5 on page 9 If your processor has a single subwoofer output do not use a Y connector to connect it to both the Left and Right input terminals of the subwoofer The subwoofer combines both channels to mono in its amplifier input stage If
14. THX powered subwoofers operation manual MX SERIES MX 150THX V SERIES V 125THX Miller amp Kreisel Sound Corporation 10391 Jefferson Boulevard Culver City CA 90232 USA 310 204 2854 FAX 310 202 8782 1995 MILLER amp KREISEL SOUND CORP LUCASFILM Manufactured under license from Lucasfilm Ltd Lucasfilm and THX are registered trademarks of Lucasfilm Ltd THX subwoofers page 2 TABLE OF CONTENTS 1 SAFETY 3 2 INTRODUCTION creision cr 4 3 WHERE TO PLACE YOUR SUBWOOFER 4 4 OPERATION WITH THX nennen nennen nnns 4 CONNECTING THE SUBWOOFER A THX 4 TESTING THE SUBWOOFER 6 5 CALIBRATING THE SUBWOOFER nennen nnns 6 OPERATION OF THE LOW PASS FILTER AND BASS LEVEL SWITCHES 6 SELTING SUBWOOFER LEVEL THX 4 tario tereti teretes tace tone eren p rb rep di a 7 USING TWO SUBWOOFERS THX 7 6 OPERATION WIT
15. TS Before you can sit down to enjoy your new subwoofer you need to perform one simple Phasing Test This test insures optimum sound in the critical bass frequencies where your subwoofer and Satellite or L C R speakers overlap When using the subwoofer with a THX controller and THX L C R speakers the crossover slopes are linear phase When the subwoofer is placed along the same axis as the front speakers the system will tolerate a plus or minus 28 inch offset before significant losses at the crossover point are seen THX subwoofers page 12 Here are two methods of setting the correct phase with your subwoofer PHASING TEST METHOD ONE Set the switch labelled SUBWOOFER PHASE to the position Then play a familiar CD LP laserdisc or tape with steady consistent bass content Listen carefully to the mid bass region of 70 125 Hz This is the part of the spectrum where electric or string basses and drums predominate Then reverse the position of the SUBWOOFER PHASE switch If it is set to the position set it to the position If it was set to the position set it to the position The best way is to have a partner work the switch while you sit in the main listening position and listen Now listen to the same music concentrating on the mid bass If you hear less bass set the SUBWOOFER PHASE switch to the opposite position If you hear more bass leave the switch where it is the new position is correct PHASIN
16. e on top of the other their outputs will couple and give you an additional total of up to 6 dB of output Wiring with two subwoofers is simple Instead of running two interconnect cables to one subwoofer run one interconnect to each subwoofer using each LEFT MONO input jack See Figure 2 page 5 6 OPERATION WITH A NON THX PROCESSOR OPERATION OF THE LOW PASS FILTER SWITCH With a non THX controller preamp etc this switch should be set to the 80 Hz 24 dB OCTAVE position Do not operate this switch unless the BASS LEVEL control is set to MIN For use with non THX systems your subwoofer has been optimized for an 80 Hz crossover with a 24 dB octave slope This low pass filter makes a rapid transition to 36 dB octave above 125 Hz which provides the extremely sharp attenuation needed to make the subwoofer s sound non directional For optimal performance we strongly recommend that you use an M amp K HP 80 High Pass Filter Your subwoofer with this filter and M amp K Satellites forms a 4th order Linkwitz Riley crossover between satellite and subwoofer The linear phase of this crossover means uncompromised performance with great flexibility in system setup without elaborate calibrations or adjustments THX subwoofers page 8 OPERATION OF THE BASS LEVEL SWITCH When using the subwoofer with a non THX processor preamp etc this switch should be set to the VARIABLE position The subwoofer level can then be set independentl
17. e subwoofer are located on its large metal backplate which can be found on the back panel of the subwoofer cabinet To connect the subwoofer run a shielded RCA RCA interconnect cable from the SUBWOOFER THX subwoofers page 5 OUTPUT jack on your THX controller to the LEFT MONO INPUT jack on the subwoofer s backplate See Figure 1 below Some THX controllers have a pair of stereo subwoofer outputs while others have a single mono output Your subwoofer is compatible with both types If your THX controller has stereo subwoofer outputs use a stereo shielded cable connecting it to the LEFT and RIGHT INPUT terminals on the subwoofer If your THX controller has only a single mono subwoofer output use a mono cable and connect it to the subwoofer s LEFT MONO INPUT jack See Figure 1 below Do not use a Y connector to connect the signal to both the LEFT and RIGHT inputs of the subwoofer These inputs are summed to mono in the amplifier input stage and if they are combined the result will be too much gain and bass level FIGURE 1 WIRING ONE SUBWOOFER WITH A THX CONTROLLER LOW PASS RIGHT e FILTER 80Hz 24 dBIOCTAVE SUBWOOFER OUT INPUT PHASE THX CONTROLLER FIGURE 2 WIRING TWO SUBWOOFERS WITH A THX CONTROLLER use a Y connector if your controller has only one subwoofer output jack THX CONTROLLER SUBWOOFER OUT 10 s cet FER Su
18. f operation for the subwoofer is to remain plugged in 24 hours a day Among other things this means that you don t have to walk over to the subwoofer to turn it on every time you want to use the system THX subwoofers page 11 DO NOT PLUG THE SUBWOOFER INTO A SWITCHED OUTLET ON ANOTHER COMPONENT THE SUBWOOFER CAN DRAW UP TO 400 WATTS FROM THE AC LINE IT MUST BE PLUGGED INTO A SOLID AC LINE Now play some music through your system to make sure that the Satellite soeakers are working properly If they are carefully advance the BASS LEVEL control The subwoofer should begin to play Set the BASS LEVEL control where the subwoofer sounds in balance with the Satellite speakers If the system is not working properly unplug the subwoofer and check all of your connections Call your dealer or the factory if you cannot solve any problem SETTING THE SUBWOOFER LEVEL NON THX Here are two ways to set the subwoofer level First if you can obtain a spectrum analyzer you can accurately match the subwoofer to the main speakers First feed a wideband pink noise signal into the full system both the satellites and the subwoofer Then set up the analyzer at the main listening position Adjust the BASS LEVEL control until the analyzer display shows the flattest response through the 70 125 Hz midbass region If you don t have access to an analyzer the best way to match the level of the subwoofer to your system is to do it by ear listening ove
19. h as you move the subwoofer around In some rooms corner locations excite resonance modes producing a muddy or boomy sound In these rooms a location along a wall away from the corner may give the best results Find a spot where no single bass note overpowers the others and the overall sound is powerful and clean You want to achieve a smooth sound quality with the entire bass spectrum equally prominent Usually this will be along one wall probably close to or directly in a corner not in the center of the room SPECIAL METHOD FOR PLACING THE SUBWOOFER If you are interested in getting the best possible sound from your subwoofer this technique is often successful It does require though that you be willing to move some furniture around Place the subwoofer where your mainlistening position will be and connect it to your system Play some music through the system and then walk around the room listening to how the sound quality changes from location to location As you listen concentrate on the quality of the bass in the parts of the room where you could place the subwoofer The location where you hear the best combination of a smooth response exciting deep bass impact and sock with the least boominess should be the best place to locate the subwoofer Move the subwoofer to that location and continue your listening tests now from the main listening position If the sound quality is good leave the subwoofer where it is If it i
20. image localization and focus with solid midbass impact and output you have the ideal location If you have two subwoofers perform one test for each subwoofer When you perform each test make sure the other subwoofer is not operating by either unplugging its input cable or its power cord 8 FINE TUNING THE PLACEMENT OF YOUR SUBWOOFER Experimenting with the placement of the subwoofer can significantly improve its sound Once the subwoofer is hooked up listen to it with a familiar CD Laserdisc LP etc with good bass content As you move the subwoofer listen carefully for changes in the amount and quality of the system s bass reproduction THX subwoofers page 13 The amount and quality of bass you hear is dependent on the room itself Low frequencies are affected by a room s size and type of construction Rooms differ when it comes to reproducing bass and in every room bass quality changes when the subwoofer is moved from one location to another A simple rule to remember is that you get more bass when you move the subwoofer towards any wall or corner Moving it away from a wall or corner gives you less bass Remember that the floor also loads the subwoofer and that maximum bass is found with the woofer on the floor in a corner We recommend starting with the woofer in a corner or very close to one and proceeding from there Acorner location gives you maximum bass output and sonic excitement as well as a standard to compare wit
21. output a Make sure that the subwoofer is plugged into an AC outlet b Ifthe BASS LEVEL switch is set to VARIABLE make sure that the BASS LEVEL control is set above the MIN position Rotate it clockwise if it is set to the MIN position Make sure that the SUBWOOFER OUTPUT level control on your processor or amp is set above the MIN position Ifthe BASS LEVEL control is set to THX make sure that any SUBWOOFER OFF ON switch found on the controller front or rear panel or remote control is set to ON Make sure that the SUBWOOFER OUTPUT level control on your THX controller is set above the MIN position d Check the red LED on the subwoofer s back panel If the LED is not lit check the AC fuse next to the LED Unplug the subwoofer before changing the fuse See instructions on Page 15 If the element inside the fuse is broken replace the fuse If the fuse blows again contact your dealer or M amp K e Ifthe red LED is still lit set the BASS LEVEL switch to the VARIABLE position Turn the BASS LEVEL control to MIN Plug a standard RCA cable into the LEFT MONO FROM PREAMP jacks Lightly touch the plug at the free end of the cable Then turn the BASS LEVEL control clockwise If you hear a buzz or hum from the subwoofer when you touch the cable the subwoofer is working Look elsewhere in your system for the problem If you hear no output contact your dealer or M amp K for service f Make sure your cables are OK
22. p K THX subwoofer is an MX push pull dual driver subwoofer we have enclosed a hardware kit consisting of four black metal spikes threaded at one end and tapering to a sharp point at the other Depending on their orientation they can be used either as carpet spikes or rubber feet To avoid damage to the floor do not use the spiked end on hardwood or tile floors By mounting these spikes into the threaded inserts mounted in the bottom of the subwoofer you can elevate the subwoofer and on carpet couple it more tightly to the floor The threaded inserts are found in the four corners of the cabinet s bottom The inserts are 1 4 20 that is 1 4 inch in diameter and 20 threads per inch This is compatible with the majority of alternative spikes cones tip toes etc offered by other manufacturers To properly secure the feet to the cabinet you must use the provided washer and jamb nut on the threaded portion of the foot The washer goes first with the nut over it holding the washer securely in place This prevents damage to the spike and insert in case something pushes the cabinet laterally 10 TROUBLESHOOTING Your subwoofer amplifier circuit provides high reliability and if necessary easy modular parts replacement This guide will help solve or diagnose most problems that may occur Remember if a fuse blows you must replace it with the correct value to avoid fire hazards and to maintain the warranty 1 If your subwoofer has no
23. quiring elaborate calibrations or adjustments Do not use either of these filters with a THX controller The THX controller has the appropriate filters in its built in crossover circuitry Also do not use a SUBWOOFER OUTPUT jack on your amp or processor to feed any of these filters To connect one of these filters run one set of shielded RCA RCA interconnect cables from the receiver amp or preamp s MAIN OUTPUT to the input jacks on the LP 1S the HP VF 80 Run another set of interconnects from the high frequency output jacks on the filter to receiver or amp s POWER AMP inputs Last run interconnects from the subwoofer output jacks to the subwoofer s FROM PREAMP jacks See the instructions enclosed with your filter for wiring diagrams To use these filters make certain that the BASS LEVEL switch is set to VARIABLE and that the LOW PASS FILTER switch is set to 24 dB OCTAVE TESTING THE SUBWOOFER NON THX Once all of the interconnect cables are in place you are ready to plug in your subwoofer Make sure the LOW PASS FILTER switch is set to the 24 dB OCTAVE position and the BASS LEVEL control to set to VARIABLE Make sure the SUBWOOFER PHASE switch is set to the position Then plug the AC cord in You should see the red LED on the back panel of the subwoofer illuminate When your system wiring is complete and the subwoofer is plugged into the wall leave it plugged in even when the system is turned off The normal mode o
24. r several hours to familiar recordings Make adjustments to the level in small increments depending on whether the bass level sounds too high or too low There is a possibility that your surround sound processor has a built in test generator for the subwoofer level but the virtually all non THX processors do not If you do have such a surround sound processor see SETTING SUBWOOFER LEVEL THX on page 7 In any case remember that you can always deliberately set the level higher if you want more bass or lower if you don t want to disturb your neighbors USING TWO SUBWOOFERS NON THX Using two subwoofers in your audio video system will give you the ultimate in bass performance It will give you improved impact and definition as well as greater output and dynamic range If you locate the subwoofers in different parts of the room you will hear a better overall frequency response as the room modes excited by one woofer are complemented by the presence of the other Alternately if you stack two subwoofers one on top of the other their outputs will couple and give you an additional total of 6 dB of output Wiring with two subwoofers is simple Instead of running two interconnect cables to one subwoofer just run one interconnect to each subwoofer using the LEFT MONO input on each subwoofer You don t need to use a Y connector See Figure 4 page 8 or Figure 6 page 9 7 SATELLITE SUBWOOFER PHASING TEST WITH BOTH THX AND NON THX COMPONEN
25. s not continue experimenting as above Good luck The subwoofer generates tremendous energy so it may vibrate objects close to it If you hear buzzing or vibrating objects try moving the subwoofer and or damping the vibration of those objects The THX Wow disc Chapter 16 Side 2 contains test signals useful for locating buzzes and rattles Buzzes and rattles can be cured or improved by applying glue tape or pads in the area where the objects are vibrating against each other Try felt pads between objects that cannot be taped or glued together such as picture frames buzzing against walls One subwoofer is sufficient in a stereo system because the human ear brain hearing system cannot locate the direction of bass sounds below 150 Hz We perceive the direction of low frequency sounds by the higher frequency overtones reproduced by the Satellite or L C R speakers All M amp K Powered Subwoofers have exceptionally sharp 36 dB octave low pass filters to remove these unwanted midbass and midrange frequencies making your M amp K subwoofer truly non directional We realize that you are probably won t design your room around the subwoofer These suggestions are helpful guidelines but remember that the subwoofer will work well just about anywhere in the room These suggestions are intended to help you find a good balance between sound quality and aesthetics THX subwoofers page 14 9 USE OF SPIKED FEET WITH MX SUBWOOFERS If your M am
26. sons QUALIFIED SERVICE PERSONNEL 1 SAFETY INSTRUCTIONS 1 READ INSTRUCTIONS All safety and operating instructions should be read before this product is operated 2 RETAIN INSTRUCTIONS The safety and operating instructions should be retained for future reference 3 HEED WARNINGS All warnings on this product and in the operating instructions should be adhered to 4 FOLLOW INSTRUCTIONS All operating and use instructions should be followed 5 ATTACHMENTS Do not use attachments not recommended by the product manufacturer as they may cause hazards 6 WATER AND MOISTURE Do not use this product near water for example near a bath tub wash bowl kitchen sink or laundry tub in a wet basement or near a swimming pool and the like 7 ACCESSORIES Do not place this product unstable cart stand tripod bracket or table The product may fall causing serious injury to a child or adult and serious damage to the product Use only with accessories recommended by the manufacturer or sold with the product Any mounting of the product should follow the manufacturer s instructions and should use a mounting accessory recommended by the manufacturer 8 POWER SOURCE This product should be operated only from the type of power source indicated on the marking label If you are unsure of the type of power supply to your home consult your product dealer or local power company 9 OVERLOADING Do not overload wall outlets or ex
27. tension cords as this can result in a risk of fire or electric shock 10 LIQUID ENTRY Never spill any liquid of any kind on the product 11 SERVICING Do not attempt to service this product yourself Opening or removing covers including any over bottom or side speaker drivers may expose you to dangerous voltage or other hazards Refer all service to qualified service personnel 12 DAMAGE REQUIRING SERVICE Unplug this product from the wall outlet and refer servicing to qualified personnel under the following conditions a When the power supply cord or plug is damaged b If liquid has been spilled or objects have fallen into this product 6 If the product does not operate normally by following the operating instructions Adjust only controls that are covered by the operating instructions as an improper adjustment of other controls may result in damage and will often require extensive work by a qualified technician to restore the product to its normal operation d If the product has been dropped or damaged in any way e When the product exhibits a distinct change in performance this indicates a need for service 13 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 risk of fire electric shock or other hazard 14 SAFETY CHECK Upon comple
28. tion of any service or repairs to this product ask the service technician to perform safety checks to determine that the product is in proper operating condition 15 HEAT This product should be situated away from heat sources such as radiators heat registers stoves or other products including amplifiers that produce heat THX subwoofers page 4 2 INTRODUCTION Congratulations Your new M amp K THX subwoofer truly represents the state of the art in subwoofer performance The new dimension of deep and powerful bass it provides will both thrill and excite you We strongly encourage you to read this owner s manual as there is a great deal of information provided here to help you get the best possible performance If you have any questions about your subwoofer please contact your M amp K Home THX Audio dealer or call the M amp K factory directly at 310 204 2854 from 8 30 AM to 5 00 PM Pacific Time We will be more than happy to help you with any question no matter how simple or complex it may be For more details on the installation and calibration of your Home THX Audio system please refer to the THX Installation amp Operation Manual THIS OWNER S MANUAL HAS TWO SETS OF SET UP INSTRUCTIONS ONE SET IS FOR USING THE SUBWOOFER WITH A THX CONTROLLER THE OTHER SET IS FOR USE WITH NON THX PROCESSORS To operate it with a THX controller see Section 4 below To use it with a non THX controller see Section 6 page 7 3
29. with one identical in size and value Using a larger fuse will void your warranty AND MAY CREATE A FIRE HAZARD Plug the subwoofer back in If it does not work unplug it immediately and contact M amp K or your dealer for service THX subwoofers page 16 REPLACEMENT FUSE VALUES 110 VOLT 220 VOLT 220 VOLT 3 AG 1 4 x 1 1 4 slow blow 5 X 20 mm 127 1 MX 150THX 4 amp 2 amp T 1 6 A time lag V 125THX 2 amp 1 amp T 800 mA time lag 11 IF YOU NEED SERVICE Contact your dealer or M amp K with a complete description of the problem Please have the unit s model and serial numbers found on the back of the cabinet date of purchase and your dealer s name You can call M amp K between 8 30 AM and 5 00 PM Pacific Time Monday through Friday at 310 204 2854 If you call outside these hours leave a message and we will return your call DO NOT RETURN YOUR SPEAKERS TO THE FACTORY FOR SERVICE WITHOUT OBTAINING PRIOR AUTHORIZATION All M amp K subwoofers carry a three year limited parts and labor warranty This warranty is transferable to new owners up to three years from the date of original purchase It does not cover abuse misuse repairs by unauthorized service stations speakers without serial numbers and damage in shipping or by accident If you have questions about the warranty please contact M amp K or your dealer SAVE ALL OF YOUR SUBWOOFER PACKING MATERIAL YOU MUST USE IT ANY TIME YOU SHIP YOUR UNIT 12 SPECI
30. y to match your speakers The CALIBRATED mark is a reference relative to THX levels For a discussion of this CALIBRATED mark please see Operation of the Bass Level Switch on page 7 WIRING WITH A NON THX PROCESSOR OR PREAMP The FROM PREAMP RCA terminals on the subwoofer allow you to connect the subwoofer to preamp level components other than THX controllers such as preamplifiers integrated amps and receivers with preamp outputs high pass filters crossovers standard surround sound processors etc All of the input connections and controls for the subwoofer are located on its large metal backplate which can be found on the back panel of the subwoofer cabinet FIGURE 3 WIRING ONE SUBWOOFER TO AN AMP OR PROCESSOR WITH A SUBWOOFER OUTPUT JACK NON THX LOW PASS RIGHT FILTER iz 24 dBIOCTAVE SUBWOOFER MONO OUT INPUT E A PHASE SURROUND PROCESSOR FIGURE 4 WIRING TWO SUBWOOFERS TO AN AMP OR PROCESSOR WITH A SUBWOOFER OUTPUT JACK NON THX SUBWOOFER or MONO OUT SURROUND PROCESSOR use a Y connector to connect to two subwoofers FILTER THX subwoofers POWER AMP OO MAIN IN PREAMP use one Y connector for each channel to split the output of the preamp FIGURE 5 WIRING ONE SUBWOOFER TO AN AMP OR PREAMP WITH ONE SET OF PREAMP OUTPUTS BASS LEVEL REFERENCE 3 98 LEFT MONO VARIABLE LOW
Download Pdf Manuals
Related Search