NHT SW10 User's Manual
Contents
1. Model SW1O ll SW 1 2 Powered Subwoofer IMPORTANT SAFETY INSTRUCTIONS A e OF ELECTRIC SHOCK e NOT OPEN CAUTION TO REDUCE RISK OF ELECTRICAL SHOCK DO NOT REMOVE COVER OR BACK NO USER SERVICEABLE PARTS INSIDE REFER TO QUALIFIED SERVICE PERSONNEL The lightning flash with the arrowhead symbol within an equilateral triangle 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 within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance servicing instructions in the literature accompanying the appliance WARNING TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE 1 READ INSTRUCTIONS All safety and operating instructions should be read before the appliance is operated 2 RETAIN INSTRUCTIONS Safety and operating instructions should be retained for future reference 3 HEED WARNINGS All warnings on the appliance and in operating instructions should be adhered to 4 FOLLOW INSTRUCTIONS All operating and use instructions should be followed 5 WATER AND MOISTURE The appliance should not be used near water near bathtub washbowl kitchen sink laundry tub in a wet basement near a swimmi2. counter clockwise e Turn on your audio system including the SW10 II or SW12 Play some music you are familiar with and set your receiver preamplifier volume to a comfortable lis tening level e Slowly increase the volume of the SW10 Il or SW12 lis tening for proper frequency balance When balanced you will hear improved bass extension but not be aware that itis coming from the subwoofer From this point on the volume control on your receiver preamplifier will control the overall volume of your system including the subwoofer The Boundary EQ This is a feature unique to NHT Evolution products Reflective boundaries such as walls reinforce a speaker s bass output 3dB for two walls 6dB for a corner if the subwoofer is placed near them Conversely placing a subwoofer out in the room results in a relative decrease in bass output Boundary reinforcement may lead to low frequency response that is uneven Some frequencies will sound exaggerated relative to others or the subwoofer will sound thin and lack impact The Boundary EQ control allows you to compensate for the effects of room boundaries on the frequency response of the subwoofer Adjusting the control enables you to achieve smooth low frequency output from the sub woofer regardless of its location in your room The following diagrams shown in Fig 1 show the corre lation between subwoofer placement and Boundary EQ These diagrams are guidelines only Your room
3. 110 to 120 VAC and the 230VAC position for 220 to 240 VAC Next you will likely need a power cord that fits the AC receptacle and you will need to replace the fuse see Changing the Fuse below Changing the Fuse The SW10 Il and SW12 amplifier s fuse is user servicea ble To replace it turn the power OFF e unplug the power cord e remove the fuse holder cover above to the power inlet with a flat blade screwdriver e remove the fuse from the holder and replace it with the appropriate type e reinstall the fuse holder Always replace the fuse with one of the exact same specifications SW10 Il For systems operating at 115 volts use only a 5x20 mm T3A 250 volt slow blow fuse For systems operating at 230 volts use only a 5x20 mm T2 0A 250 volt slow blow fuse SW12 For systems operating at 115 volts use only a 5x20 mm T5A 250 volt slow blow fuse For systems operating at 230 volts use only a 5x20 mm T2 5A 250 volt slow blow fuse Troubleshooting If the SW10 Il or SW12 fails to operate at all when the Power Switch is turned on thoroughly check the power cord input and output connections If the SW10 Il or SW12 turns on but the LED indicator fails to illuminate mis wiring or a power surge may have caused the protection fuse to blow Replace it with one of correct type and value If the SW10 Il or SW12 turns on but its status LED stays red the unit is gone into protect mode which could be c
4. nominal 8 ohm nominal 8 ohm nominal 8 ohm nominal Recommended Minimum 15 watts Minimum 15 watts Minimum 15 watts Minimum 15 watts Minimum 15 watts Minimum 15 watts Amplifier Power Maximum 125 watts Maximum 150 watts Maximum 175 watts Maximum 200 watts Maximum 150 watts Maximum 175 watts Weight 8 Ibs 13 Ibs 16 lbs 47 5 lbs 11 Ibs 22 Ibs 39 5 Ibs 47 5 lbs Dimensions 6 75 x 6 25 x 10 25 8 75 x 7 5 x 11 85 10x8x 13 12x 8x 38 6 63 x 16 54 x 5 63 85x19x6 5 14x 12x 18 16x14x20 Depth x Width x Height Finish White or Black White or Black Black Black Black Black Black Black High Gloss Piano High Gloss Piano High Gloss Piano High Gloss Piano High Gloss Piano High Gloss Piano High Gloss Piano High Gloss Piano Finish Finish Finish Finish Finish Finish Finish Finish Warranty Period For a period of 5 years for parts and 5 years for labor 1 year parts and 90 days labor for electronics from the date this product is first purchased from an author ized NHT dealer Now Hear This NHT warrants that if it fails to function properly due to a manufacturing defect despite its being installed and operated accord ing to these instructions and used under normal conditions it will be either replaced or repaired with new or rebuilt parts both at NHT s option with a unit of comparable value without charge to you Limited Warranty Valid Only in the U S A What s Not Covered Altered defaced or removed serial numbers void this warranty This warranty d
5. or exhibits a marked change in performance or e The appliance has been dropped or the enclosure is damaged 18 SERVICING Do not attempt to service this product yourself as opening or removing covers may expose you to dangerous voltage or other hazards Refer all servicing to qualified service personnel For service warranty information call the NHT Hotline number 1 800 NHT 9993 19 REPLACEMENT PARTS When replacement parts are required be sure the service technician has used replacement parts specified by the manu facturer or that have the same characteristics as the original part Unauthorized substitution may result in fire electric shock or other hazards 20 SAFETY CHECK Upon completion 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 CAUTION TO PREVENT ELECTRIC SHOCK DO NOT USE THIS POLARIZED PLUG WITH AN EXTENSION CORD RECEPTACLE OR OTHER OUTLET UNLESS THE BLADES CAN BE FULLY INSERTED TO PREVENT BLADE EXPOSURE eee Thank you for your purchase of the NHT SW10 Il or SW12 powered subwoofer Like all NHT loudspeakers the SW10 Il and SW12 s development has been guided by the study of human hearing it s design rigorously tested and its components optimized to deliver clean clear musical sound Since the quality of your speakers is one of the most important factors in maximizing the sound you
6. position selectable phase control for subwoofer 0 180 7 Line Input Low level RCA input jacks for L R signals 8 LFE In Out Low level RCA input jack for LFE or sub woofer signal Out is an unbuffered pass through used for multiple subwoofers 9 Hi Level Input Speaker level input connector 10 Power Switch Turns the unit on and off 11 Fuse Holder location of the user servicable fuse 12 Power Inlet For universal AC line input connection 13 Input Voltage Switch Selects 115 VAC or 230 VAC mains voltage Connecting The SW10Il OR SW12 FI 3 ee Low Pas Caution Before connecting the SW10Il OR SW12 to your audio system it is important to unplug or turn off all AC power connections to connected components such as receivers amplifiers preamplifiers and proces sors Do not plug in or connect the SW10II OR SW12 subwoofer to AC power until all connections have been made Integrating the SW10Il or SW12 into your surround sys tem is simple and straightforward when using this con nection method Your AV Receiver will control all crossover functions and the SW10II or SW12 will control Subwoofer gain phase and boundary equalization Connect the Subwoofer LFE Output on your AV Receiver to the LFE IN on the back of the SW10II or SW12 Fig 2 Main Speakers Reciever SPEAKER OUTPUTS L R LFE Sub SW10 SW12 Back of Subwoofer In the event your rece
7. this method only if both A amp B speaker outputs can oper ate simultaneously e For amps and receivers with only one set of speaker output terminals simply feed the same signal in parallel to both your main L amp R speakers and the SW10II OR SW12 Connect one pair of speaker cables from your component s speaker output terminals to the L amp R speakers and a second pair from the same output ter minals to the SW10II OR SW12 s High Level input The SW10I OR SW12 s input does not present a significant load to the receiver and will not compromise its output to the L amp R speakers If you find that your receiver will not accommodate more than one cable per output terminal check with your NHT dealer for alternative methods of connection Reciever Main Speakers SPEAKER OUTPUT SPEAKER OUTPUT SW10 SW12 Back of Subwoofer With all signal connections complete it is now time to apply AC power Plug the power chord into the power inlet in the back of the subwoofer plug the other end into into the wall outlet and switch the subwoofers power to the ON position Fine Tuning the Subwoofer The key to good subwoofer speaker integration is repeated listening followed by making small re adjust ments of the subwoofer controls The most important bass tuning functions you will control are the LOW PASS FILTER followed by the VOLUME CONTROL settings and then PHASE SELECTOR The frequ
8. acoustics and personal tastes will ultimately dictate the final setting Boundary Half 3dB Space 0 3dB Boundary 3dB 0 3dB Boundary 3dB 0 3dB LOW PASS FILTER This control determines the upper limit frequency the subwoofer will reproduce For example setting the filter at 100Hz will cause the subwoofer to reproduce only frequencies below 100Hz The Low Pass Filter is continuously variable between 40Hz low bass and 180Hz upper bass to accommodate different speakers Two tips on using the Low Pass Filter As a starting point set Low Pass Filter to the 1 o clock position This will result in an 80Hz low pass As the set ting is typical for most Dolby Digital DTS applications Note The LFE input bypasses the adjustable 12dB Low Pass Filter See the Fine Tuning section for further adjustment guidelines SUBWOOFER PHASE This switch sets the phase of the subwoofer at either the 0 position normal phase or the 180 position reverse phase to achieve the smoothest possible bass response in your system This phase reversing option is important because if bass frequencies come from both the subwoofer and the main speakers peaks and dips in the frequency response can occur at the listening position In these cases reversing the subwoofer phase can improve blending and balance To properly set the Subwoofer Phase Play familiar music reversing phase settings A
9. aused by incorrect wiring short circuits or excessive volume Turn off the Power Switch on the subwoofer for two or more seconds to reset and double check all speaker cables to be sure that no small metal strands are shorting the terminals If these steps don t restore the SW10 Il or SW12 to oper ation contact your local Authorized NHT Dealer or NHT for assistance Satisfaction Your satisfaction with your new NHT SW10 Il or SW12 Subwoofer is important to us Please note the matched products and accessories we provide for them and your warranty printed on the back of this manual If you have any questions regarding your speakers use feel free to call NHT at 1 800 NHT 9993 Enjoy your listening and viewing Ea i Glossary Active Uses electrical power Amplifier An electronic device that increases the cur rent and or voltage of a signal providing power to the loudspeakers i e power amplifier integrated amplifier receiver Bass The range of audio frequencies below 180Hz characterized by low pitch Crossover An electronic circuit that divides an audio signal into different frequency ranges Distortion Any deviation from the original signal Driver The moving part of a loudspeaker which radiates sound energy Dynamics Variations in loudness of sound Frequency A rate of vibration which corresponds to musical pitch expressed in Hertz Hz Full Range A signal encompassing the entire au
10. dible frequency spectrum Hertz Hz A unit equal to one cycle per second used to measure the frequency of a signal or sound High Pass Filter A filter that passes only high frequen cies above a lower limit Impedance A measure of the total opposition to current flow in an alternating current circuit measured in ohms In Phase The polarity of an audio signal when connect ed as follows to and to Integrated Amplifier A preamplifier and amplifier built into one chassis Interconnect Cable A length of shielded wire with plugs at both ends for feeding signals from one electronic device to another L F E Low Frequency Effects The 1 channel of infor mation recorded on most multichannel digital sound for mats Line Level Connection Low level RCA phono or XLR type connection Load A term used to describe the impedance that a speaker presents to an amplifier Low Pass Filter A filter that passes only low frequen cies below a higher limit Main Speakers Front L amp R channel speakers some times referred to as satellites Main In A line level RCA XLR power amplifier input on the back of a receiver integrated amplifier or power amplifier Midrange The frequency span in the middle of the audio range roughly 180Hz 3000Hz Also used to describe the driver that reproduces these frequencies Ohm A unit of electrical resistance That which opposes an electric current in a conductor In audio a m
11. easure of the load presented by a device to an electrical source Out of Phase The polarity of an audio signal when connected as follows to and to Passive Uses no electrical power Phase An expression of the relative polarities of two sig nals Power Handling The ability of a loudspeaker to operate without large increases in distortion when given varying amounts of input power Preamplifier An electronic device that selects sources and passes line level signals to an amplifier Pre Out A preamp line level RCA output on the back of a receiver integrated amplifier or preamplifier Receiver A preamplifier amplifier and tuner built into one chassis Satellite Front L amp R speakers when used with a sub woofer Also referred to as main speakers Sensitivity A ratio of voltage across the speaker load to the acoustic power output measured in decibels Sub Out An line level output for connection to a sub woofer or subwoofer signal processor Subwoofer A driver designed to operate over the low bass portion of the audio range Also refers to a system consisting of a woofer and its enclosure which are phys ically separate from the upper range loudspeakers Surround Speakers Speakers located in the side or rear for surround channel effects Treble The upper part of the frequency spectrum con sisting of frequencies above about 3000Hz Tweeter A small driver designed to reproduce high fre quencies Wa
12. ency chart below lists some terms commonly used to describe different bands of the frequency spectrum Listen to your system and make adjustments to achieve a seamless blend between your main speakers and the SW10 Il or SW12 Four common prob lems are outlined below Follow the flow chart to correct these See the glossary for any terms you are unfamiliar with Frequency Chart Low Bass Wid Bass Upper Bass Lower Mid Mid Upper Mig igh Below 50Hz 50Hz 100Hz 100Hz 180Hz 180Hz 300Hz 300Hz 700Hz 700Hz 3K 3K and above Fine Tuning Flow Chart Boomy Lacks Excessive Too Much Mid Upper Bass Low Mid Upper Lean But With Bass Bass Weight Weight y y y y Adjust Adjust Adjust Decrease Subwoofer Subwoofer Subwoofer Boundary Phase Phase Phase EQ 0 90 0 90 Switch Vv Continuously Continuously 0 180 Add Add Move y Vv y Subwoofer Farther Lower If this makes Increase From Wall Low Pass it worse Raise Boundary V X Over try gt gt gt Low Pass EQ Frequency If the sound Setting y Listen y improves y Move Lower y Adjust Subwoofer Subwoofer Adjust Subwoofer Closer to Volume Subwoofer Volume Wall y Volume y y Listen Y Adjust Eisten Listen Subwoofer Phase Yy Listen Operation We recommend that the SW10 Il or SW12 power be left on which will allow the bu
13. ilt in Auto Mode feature to dis able the subwoofer when not in use Every speaker has limits and it s important to listen for them Speaker damage most often results not from brief loud musical peaks but from sustained high volume lev els in some or all frequencies For this reason extreme volume settings and excessive bass treble or equalizer boosts are not recommended If you hear unusual distortion or breakup or notice heat coming from the woofer decrease volume immediately neutralize any excess bass treble or equalizer boosts and avoid setting any controls to similar extremes again Maintenance Your SW10 Il and SW12 is designed for years of use with no or minimal maintenance as long as you avoid expos ing it to direct sunlight high temperatures or moisture Clean cabinets when necessary using a damp cloth or a mild non abrasive cleaner to clean grilles remove from speaker and use a soft brush or a vacuum on its lowest setting Do not attempt to clean the actual driv er 9 8 Changing the Line Voltage Setting The SW10 Il and SW12 were designed to operate on two line voltage settings 115VAC and 230VAC In the event that it is necessary to change the line voltage setting begin by turning the power switch to the off position Remove all the connections from the amplifier including the detachable power cord Using a flat blade screw driver slide the switch to the correct position Use the 115VAC position for
14. iver or pre amp does not have a LFE or Subwoofer output the SW10II SW12 has two additional connection methods 1 Line Level Use if You have an amp or receiver with Pre Out jacks but no LFE Subwoofer jacks To connect for a Line Level signal Fig 3 keep your main speakers connected as usual but use RCA line level cables to connect as follows e Preamps with Line Out jacks connect one pair of Line Out cables to your main amp to power your main L amp R speakers and a second pair to the SW10II OR SW12 LINE LEVEL INPUT If your preamp has only one pair of Line Out jacks you can use a pair of Y connector cords available through your NHT dealer Main Speakers Reciever SPEAKER OUTPUTS Pre Out k R SW10 SW12 Back of Subwoofer Hi Level Input Power Mode Phase Boundary 2 bios RIME e Amps and receivers with Pre Out jacks connect the SW10Il OR SW12 from the Pre Out into the SW10II OR SW 12 s Line Input 2 Hi Level Use if Your receiver has no Pre Out or Subwoofer LFE Out jacks To connect for a High Level signal Fig 4 use two addi tional pairs of speaker cables and connect as follows e For amps and receivers with separate A and B speak er outputs connect one pair of speaker cables from your receiver s Speaker A outputs to your main L amp R speak ers and a second pair from your receiver s Speaker B outputs to the SW10II OR SW12 s High Level Input Use
15. ll get from your music and home theater system we re sure that you ll find your purchase of the SW10 Il and SW12 a good investment and invite your comments If you find your experience with the SW10 Il and SW12 as satisfying as we believe you will and wish to enjoy its high quality sound through your entire system you ll find information about other sonically matched NHT Super Series loudspeakers on the back of this manual Background ______ The NHT SW10 Il and SW12 Powered Subwoofer is a compact versatile and powerful amplified subwoofer designed to provide low frequency reinforcement for high performance audio and home theater systems The SW10 Il and SW12 features line level and speaker level inputs for connection with all types of receivers or other audio components e independent gain phase and low pass filter controls e boundary control for adjusting system sound for various room placement Please take a few minutes to read through this owner s manual before setting up your speakers this information will help you get the most out of them Also please keep the SW10 Il or Sw12 s packaging to use in case you move or transport them If you have questions at any time during setup or use feel free to call your NHT dealer or our Toll Free Customer Hotline at 1 800 NHT 9993 Placement ee Note To prevent the SW10 Il and SW12 subwoofer amplifier from overheating always be sure to provide adequate s
16. nd listen from your usual position Avoid evaluating while standing above the subwoofer or amplifier sound at the listening position will be significantly different The correct setting is the one in which the bass is the loudest at the listening position POWER MODE This feature automatically switches your SW10 Il or SW12 into minimum power mode ie sleep whenever no signal is present for 20 minutes When a signal is received it immediately turns on again As AUTOMode is automatic it requires no adjustment nor is there a need to turn the SW10 Il or SW12 on and off every time it is used When in ON Mode the sub woofer is always on G m iQ Filter DO E po ESSI Input Voltage fo I 1isveotz J fg A y 230V 50Hz SH X 300w A 2 Back of Subwoofer refer to diagram above 1 Power Mode Leaves Subwoofer in permanantly on ON or puts the subwoofer in automatic standby mode AUTO 2 Power Indicator The light is green when the sub woofer is on The light is amber when the subwoofer is in stand by mode The light is red when the subwoofer is in protection 3 Volume Control Adjusts the loudness of the sub woofer independently of the main speakers 4 Low Pass Filter Continuously variable low pass crossover control 5 Boundary Switch Selects response mode of sub woofer depending on placement 6 Subwoofer Phase Selector 2
17. ng pool etc 6 CARTS AND STANDS Do not place this product on an unstable cart stand tripod bracket or table The appliance should be used only with a cart or stand that is recommended by the manufacturer 7 VENTILATION The appliance should be situated so that its location and position do not interfere with proper ventilation The appliance should not be situated on a bed sofa rug or any surface that may obstruct cabinet openings 8 HEAT The appliance should be situated away from heat sources such as radiators heat registers stoves or other devices including amplifiers that produce heat 9 POWER SOURCES This product should be operated only from the type of power source indicated on the marking label If you are not sure of the type power supply in your home consult your product dealer or local power company For products intended to operate from battery power or other sources refer to the operating instructions 10 POWER CORD PROTECTION Power supply cords should be routed so that they are not likely to be walked upon or pinched by items placed upon or against them paying attention to cords and plugs convenience receptacles and the point where they exit from the appliance 11 POLARIZED PLUG This appliance is equipped with a polarized line plug a plug having one blade wider than the other This plug will fit into the power outlet only one way This is a safety feature If you are unable to insert the plug fully into the outlet
18. oes not cover any product used in trade business industrial or commercial applications This warranty also does not cover the cabinet or appearance factors or costs defects or damage resulting from misuse abuse accident improper mainte nance alterations or modifications not authorized in writing by NHT or parts or labor from any source other than an authorized NHT service location Damage due to power exposure in excess of the speaker s published power ratings ie overpowering lightning or power surges are also not covered Your Rights This warranty gives you specific legal rights and you may have other rights which vary from state to state NHT limits this warranty to the purchase price of the product excludes incidental or consequential damages and limits its obligations under any implied war ranties under state laws to a period not exceeding their warranty periods As some states do not allow the above limitations however they may not apply to you To Obtain Service To find the name and address of the nearest authorized NHT service location call or write Customer Service Department NHT 527 Stone Rd Benicia CA 94510 1 800 NHT 9993 648 9993 www nhthifi com For your future convenience please keep this warranty with your sales receipt and record date and place of purchase for further reference
19. pace for proper ventilation Do not place the subwoofer directly against the wall or any other surface The key to placing your subwoofer for optimal enjoyment is to remember that low frequencies produce sounds with long wavelengths which interact in complex ways with room boundaries such a walls and corners and other large objects as well Placing the subwoofer near to a room boundary will tend to increase its apparent bass output but may result in boomy or muddy sound Conversely placing it farther away from room boundaries will tend to decrease its apparent bass output but may result in improved articulation and clarity When possible place the subwoofer in the same horizontal plane and along the same wall as the main speakers And since small changes in subwoofer position can have a significant effect on sound experimenting with the effects of different placements in your own listening view ing room is the key to finding the sound you like best SW10 Il and SW12 Features amp Controls Volume This control allows you to adjust the gain of the Subwoofer relative to the rest of your system Many lis teners make the mistake of setting subwoofers too loud which can cause excess bloat and loss of detail and musicality A properly calibrated subwoofer blends in with the speakers and does not call attention to itself To properly set volume e Turn down the volume control on the SW10 Il or SW12 to its lowest position
20. try reversing the plug If the plug still fails to fit contact your electrician to replace your obsolete outlet Do not attempt to defeat this safety feature 12 LIGHTNING For added protection for this product during a lightning storm or when it is left unattended and unused for long periods of time unplug it from the wall outlet and disconnect the antenna or cable system This will prevent damage to the product due to lightning and power line surges 13 OVERLOADING Do not overload wall outlets extension cords or integral convenience receptacles as this can result in a risk of fire or electric shock 14 CLEANING Unplug this product from the wall outlet before cleaning Do not use liquid cleaners or aerosol cleaners Use a damp cloth for cleaning 15 NON USE PERIODS This amplifier should be unplugged from the outlet when the appliance is left unused for a long period of time 16 OBJECT AND LIQUID ENTRY Never push objects of any kind into this product through openings as they may touch dangerous voltage points or short out parts that could result in a fire or electric shock Never spill liquid of any kind on this product 17 DAMAGE REQUIRING SERVICE The appliance should be serviced by qualified personnel when a The power supply cord or plug has been damaged or b Objects have fallen on or liquid has been spilled into the appliance or c The appliance has been exposed to rain or d The appliance does not appear to operate normally
21. tt A measure of electrical power combining the volt age with the electrical current required to drive the loud speaker Weight Low frequencies below 50Hz Woofer A driver designed to operate over the bass por tion of the audio range S pecification s All Super Series products are sonically matched for seamless integration into multichannel systems System Type Driver Complement SB1 2 Way Acoustic Suspension SB2 SB3 2 Way Acoustic Suspension 2 Way Acoustic Suspension 3 Way Acoustic Suspension SCI SC2 2 Way Acoustic Suspension 2 Way Acoustic Suspension SW10 1 Vented Powered 150 watts Class G Amplifier SW12 Vented Powered 250 watts Class G Amplifier Tweeter 1 fluid cooled aluminum dome tweeter with neodymium magnet structure Woofer 5 25 6 5 6 5 6 5 and 8 2 4 5 2 5 25 10 12 i i Polypropylene Polypropylene Polypropylene Polypropylene Polypropylene Polypropylene Aluminum Aluminum Video Shielded Unless Noted 8 Not Video Shielded Not Video Shielded Not Video Shielded Response 68Hz 22kHz 51Hz 22kHz 39Hz 22kHz 31Hz 22kHz 78Hz 22kHz 73Hz 22kHz 31Hz 180Hz 27Hz 180Hz 3dB 3dB 3dB 3dB 3dB 3dB 3dB 3dB Sensitivity 86dB 2 83v 86dB 2 83v 86dB 2 83v 86dB 2 83v 86dB 2 83v 87dB 2 83v Impedance 8 ohm nominal 8 ohm nominal 8 ohm
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