Fostex NX-6A User's Manual
Contents
1. 432656 Owner s Manual Model NX hfi POWERED NEAR FIELD STUDIO MONITOR HHRacilicil Introduction Thank you very much for purchasing the Fostex Model NX 6A The NX 6A is a nearfield studio monitor with a built in power amplifier It delivers a musical and highly accurate sound allowing you to check a sound thoroughly to a fine nuance The NX 6A employs a 160 mm woofer shielded type which adopts the latest diaphragm technology and a 20 mm hard dome tweeter shielded type which features a magne sium diaphragm It features bi amplifier design 60W for the woofer 40W for the tweeter In the enclosure HP sound reflectors are installed for natural low frequency reproduc tion Thanks to the time alignment construction on the buffle surface as well as the flush surface design each sound image is pinpointed accurately From dynamic low frequencies to natural and smooth high frequencies the NX 6A re produces the whole frequency range faithfully It is the ideal monitor for recording studios FOSTCX NX 6A Powered Near Field Studio Monitor CAUTION TO PREVENT ELECTRIC SHOCK MATCH WIDE BLADE OF PLUG TO WIDE SLOT FULLY INSERT RISK OF ELECTRIC SHOCK DO NOT OPEN ATTENTION POUR VITER LES CHOCS LECTRIQUES INTRODUIRE LA LAME LA PLUS LARGE DE LA FICHE DANS LA BORNE CORRESPONDANTE DE LA PRISE ET POUSSER JUSQU AU FOND CAUTION TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE COVER2. Output Level v MAX 0dB controllable Input terminals XLR 3 31 type balanced Pin2 Hot 4dBu 6mm phone jack unbalanced 10dBV Input impedance gt 10kQ or more Cross over freq gt 6kHz 18dB oct Wf 8kHz 18dB oct Tw Tweeter SPL adjustable level 3dB controllable Lo EQ level around 55Hz range 3dB controllable lt General gt Dimensions 230 W x 350 H x 334 D mm Weight Approx 13 kg Power supply 120VAC 60Hz 230V 50 60Hz Power consumption 7OW 350 334 230 NX 6A Powered Near Field Studio Monitor Declaration of EC Directive This equipment is compatible with the EMC Directive 89 336 EEC Directive on approximation of member nation s ordinance concerning the electromagnetic compatibility and with the Low Voltage Directive 73 23 EEC Directive on approximation of member nation s ordinance concerning electric equipment designed to be used within the specified voltage range The Affect of Immunity on This Equipment The affect of the European Specification EN61000 6 1 coexistence of electromagnetic waves common immunity specification on this equipment are as shown below In the electrical fast transient ourst requirements surge conducted disturbances by radio frequency fields power frequency magnetic field radiate electromagnetic field requirements and static electricity discharging environment this could be affected by gene
3. lt THE NETHERLANDS gt NAME IEMKE ROOS AUDIO B V ADD Kuiperbergweg 20 1101 AG Amsterdam The Netherlands TEL 31 20 697 2121 FAX 31 20 697 4201 lt NORWAY gt NAME Siv Ing Benum AS ADD P O Box 145 Vinderen 0319 Oslo Norway TEL 47 2213 9900 FAX 47 2214 8529 lt PORTUGAL gt NAME Caius Tecnologias Audio e Musica Lda ADD Praca do Bom Sucesso No 61 Bom Sucesso Trade Center Escritorio 701 702 4150 1460 Porto Portugal TEL 351 22 608 06 10 FAX 351 22 608 06 29 lt SPAIN gt NAME Letusa S A ADD C Laguna 10 28923 Alcorcon Madrid Spain TEL 34 91 4862800 91 4470898 FAX 34 91 6414597 lt SWEDEN gt NAME Sennheiser AB ADD John Ericssonsgatan 10 P O Box 22035 SE 104 22 Stockholm Sweden TEL 46 8 566 16400 FAX 46 8 566 16490 lt SWITZERLAND gt NAME Audio Bauer Pro AG ADD Bernerstrasse Nord 182 CH 8064 Zurich Switzerland TEL 41 1 4323230 FAX 41 1 4326558 lt UK gt NAME SCV London ADD 40 Chigwell Lane Oakwood Hill Industrial Estate Loughton Essex IG10 3NY U K TEL 44 20 8418 0778 FAX 44 20 8418 0624 FOSTEX CO 3 2 35 Musashino Akishima shi Tokyo Japan 196 0021 FOSTEX AMERICA 13701 Cimarron Avenue Gardena CA 90249 U S A PRINTED IN CHINAAUGUST 2005 432656
4. Be careful when cleaning speaker enclosure surfaces Stained enclosure surfaces must be wiped with No protecting grilles or covers are provided with tightly wrung out soft cloth after immersion in a NX 6A Brush off dust attached to surfaces of diluted detergent Under no circumstances must speakers with soft dusters Avoid direct fingers or organic solvents such as paint thinner be used damp dust cloth contact with diaphragms NX 6A Powered Near Field Studio Monitor Block Diagram gr TWEETER HF POWER ag LEVEL odBVv g in INPUT UNBAL O A m m g VOL 0dB INPUT BAL Te O 3dB pared LF POWER WOOFER 3 COLD e A AD LOEQ Specifications lt Speakers gt 1o Enclosure system 2 way bass reflex system Drivers 160mm woofer 90 Ret Pee cat SSP A sy H 20mm hard dome tweeter Te eT We EN Impedance Woofer 6Q Tweeter 8Q 10 OTe Oy s Reproduction freq range gt 55Hz to 38kHz rh ic Enclosure volume 11 liters 50 _ L z x Maximum output sound level 104 dB with VOL max rated input Ss lt Amplifiers gt Output power Low frequency amplifier 60W e Specifications and appearance are subject to change with High frequency amplifier 40W out notice for product improvement
5. a cart is used use caution when moving the cart apparatus combination to avoid injury from tip over LAr lt Unplug this apparatus during lightning storms or when unused for long periods of time Refer all servicing to qualified service personnel Servicing is required when the apparatus has been damaged in any way such as power supply cord or plug is damaged liquid has been spilled or objects have fallen into the apparatus the apparatus has been exposed to rain or moisture does not operate normally or has been dropped NX 6A Powered Near Field Studio Monitor Precautions e In the event of smoke or odors immediately turn off the power switch and remove the AC plug from the outlet Continued use under such conditions will result in fire and or electrical shock After extinction of such conditions refer the problem to a dealer or our service station located nearest to you In no events must an attempt to correct the problem by unauthorized personnel take place Noncompliance with this notice may pose an extreme danger e In the event of entry of water or an object into the appliance immediately turn off the power switch and remove the AC plug from the AC outlet A dealer or our service station located nearest to you must be contacted for reinstatement of the original conditions Continued use without it will result in fire and or electrical shock e In the event of electrical discontinuity and or damage
6. including conductor exposure occurs to the power cord contact a dealer or our service station located nearest to you for service Continued use without it will result in fire and or electrical shock e In the even of a fall of the appliance or damage to appliance cover immediately remove the AC plug from the AC outlet and contact a dealer or our service station located nearest to you for service Continued use without it will result in fire and or electrical shock e Placement of the appliance where contact with water is likely must be avoided Otherwise fire and or electrical shock will result This precaution is particularly important when the appliance is used outdoors on rainy or snowy days on the beach or other such places e No vases or cups containing water and or small metal pieces must be placed on the appliance Spilling of water or dropping of metal pieces into the appliance will result in fire and or electrical shock e Under no circumstances must an attempt be made to disassemble repair and or alter the appliance Neither must the appliance cover be removed Otherwise fire and or electrical shock will result e No contact with the AC plug must be made after lightning has started Otherwise electrical shock will result e No heavy objects must be placed on the AC cord nor the cord be routed under the appliance Damage to the cord will occur resulting in fire and or electrical shock e The AC cord must not b
7. OR BACK NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED SERVICE PERSONNEL The lightning flash with 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 WARNING TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE 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 11 Grounding or Polarization The precautions that should be taken so that the grounding or polarization means of an appliance is not defeated 12 Power Cord Protection Power supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against them paying particular attention to cords at plugs convenience receptacles and the point where they exit from the appliance ery INSTRUCTIONS Read Instructions All the safety and operating instructions should be read before the appliance is operated 2 Retain Instructions The safety and operating instructions should be retained for future reference 3 Heed Warnings All warnings on the appliance and in the 13 Cleaning The appliance should be cleaned
8. cies while turning it left cuts the low frequencies see the graph below 110 NX 6A Powered Near Field Studio Monitor Enclosure positioning Adopting the time alignment construction as well as mounting the woofer and tweeter closely the NX 6A pro vides a wide monitoring area We recommend to install the NX 6As vertically as shown below not only from the point of view of audio phase characteristics but also from the point of view of radiation of the built in power amplifier As a human ear is sensitive in the left right direction setting the unit horizontally is undesirable from the point of view of phase characteristics Vertical positioning Optimal listening point and setting To get the best of the NX 6A performance set them at the appropriate height so that the middle point between the center positions of the tweeter and woofer matches the listener s ear height Then orient them 15 to 30 degrees inward to form a triangle as shown in the Figure below The vertex of the equilateral triangle in the Figure is best listening position Center of the tweeter Center of the woofer 15 to 30 degrees inward A P 15 to 30 degrees inward Mid point of the woofer and tweeter O Listener X Maintenance precautions
9. e damaged modified twisted pulled and or heated Otherwise the cord will be damaged resulting in fire and or electrical shock e No power voltage different from that labeled on the appliance or specified in this owner s manual must be applied The power plug must be inserted to the end of an outlet Otherwise fire and or electrical shock will result e Avoid placement of the appliance in smoky or steamy places including unusually humid or dusty places Otherwise fire and or electrical shock may result e The AC cord must not be routed near heat emitting appliances Otherwise the cord jacket may melt resulting in fire and or electrical shock e Avoid mounting or setting the appliance on unstable surfaces including wobbly or slanting planes Contact with the falling appliance may cause injury e Do not leave the appliance in places where the temperature will rise excessively including an automobile with windows closed or an area exposed to direct sunlight Otherwise fire may result e This appliance is built with precision components Moving of the appliance must be accomplished by at least two persons with care e Relocation of this appliance must occur only after the power has been turned off and the AC plug and all other connecting cords have been disconnected Otherwise cords may be damaged resulting in fire and or electrical shock e Connection of other audio equipment to this appliance must proceed only after pow
10. er to this appliance and equipment to be connected has been shut off and in strict compliance with the wiring instructions given in the manual provided with such equipment Use of the designated cords is also a prerequisite e The loudness control must be set to the minimum before turning this appliance on Otherwise unexpectedly loud sound may be produced resulting in impairment of hearing acuity e The power cord must be disconnected when not using of this appliance for an extended period of time a month or longer Otherwise fire and or electrical shock may result e Wet hands must not touch the AC plug Otherwise electrical shock may result e No cloth blanket or the like must be placed over this appliance while its power is on Trapped heat may result in fire e Maintenance of this appliance must occur only after the AC plug has been removed Otherwise electrical shock may result e Use of portable phones near the appliance is not recommended Otherwise noise may develope in this appliance e Use of this appliance near radio or TV sets may result in the development of noise If this is the case keep them apart NX 6A Powered Near Field Studio Monitor Main features of NX 6A Woofer featuring the HR Hyper Radial diaphragm The NX 6A employs the 160 mm woofer It features the highly rigid HR Hyper Radial diaphragm developed by using the latest diaphragm technology called Radial pa permaking technolog
11. ion Turning the control right boosts the tweeter level while turning it left drops the level see the graph right When the unit is shipped the TWEETER control is set to the center O dB 2 Power LED Lights when power is turned on Output level control Adjusts output level Tweeter level control Adjusts tweeter level within a 3dB range Low frequency EQ control Adjusts low frequency characteristics around 55Hz range within a 3dB range Unbalanced input terminal Phone jack Accepts 10dBV unbalanced input Balanced input terminal XLR 3 31 type Accepts 4dBu balanced input hot pin is 2 lt CAUTION gt The balanced XLR and the unbalanced phone input connectors cannot be used simultaneously When the unbalanced connector is plugged the unbalanced input takes priority and the balanced input is disabled Heatsink lt CAUTION gt If you use the NX 6A for a long time the heatsink gets extremely hot Do not touch the heatsink in such a con dition Power switch Turn the power on or off Make sure that the output level control of the connected equipment is set to minimum when turning on the power AC INconnector Connects the AC cord provided Level controls and EQ Low around 55Hz range EQ You can use the LO EQ control to boost cut the low frequency around 55Hz range within the range of 3 dB Turning the control right boosts the low fre quen
12. nary wave is decayed The time alignment construction is adopted on the buffle surface of the enclosure which allows to position each sound image accurately The flush surface design elimi nates sound blur HP sound reflector lt Figure 3 gt The arrangement example of the HP sound reflectors the cut model above shows the inside of the Fostex NF 1 HR diaphragm UDR tangential edge lt Figure 1 gt Magnesium diaphragm lt Figure 2 gt e Bi amplifier power The NX 6A utilizes a powerful bi amplifier design 60W for the woofer 40W for the tweeter Driving each speaker unit independently eliminates audio impurity caused by the electric interference between the units The built in power amplifier also provides functions for compensat ing audio frequency characteristics to match the sonic character of a room including the low frequency around 55Hz range equalizer and the tweeter level control The power amplifier is equipped with both the balanced and unbalanced input connectors allowing connection to any audio systems Amplifier section lt Figure 4 gt f NX 6A Powered Near Field Studio Monitor Names and functions te on RW PY Output level control Rotating the VOL control clock wise increases the output level Tweeter level control You can use the TWEETER con trol to adjust the tweeter level within the range of 3 dB The center position 0 dB is the nominal posit
13. only as operating instructions should be adhered to recommended by the manufacturer 4 Follow Instructions All operating and use instructions should 14 Nonuse Periods The power cord of the appliance should be be followed unplugged from the outlet when left unused for a long period of 5 Water and Moisture The appliance should not be used near time water for example near a bathtub washbowl kitchen sink 15 Object and Liquid Entry Care should be taken so that objects laundry tub in a wet basement or near a swimming pool and do not fall and liquids are not spilled into the enclosure through the like openings 6 Carts and Stands The appliance should be used only with a 16 Damage Requiring Service The appliance should be serviced cart or stand that is recommended by the manufacturer by qualified service personnel when A The power supply cord or the plug has been damaged or B Objects have fallen 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 or exhibits a marked change in performance or wi E The appliance has been dropped or the enclosure damaged _ 17 Servicing The user should not attempt to service the appliance beyond that described in the operating instructions All other servicing should be referred to qualified service An appliance and cart combination should be moved with care Quick stops excessi
14. otective earth terminal should be connected to a mains outlet with a protective earth connection 24 Where the MAINS plug or an appliance coupler is used as the disconnect device the disconnect device shall remain readily operable NX 6A Powered Near Field Studio Monitor Important Safety Instructions Read these instructions Keep these instructions Heed all warnings Follow all instructions Do not use this apparatus near water Clean only with dry cloth Do not block any ventilation openings Install in accordance with the manufacturer s instructions Do not install near any heat sources such as radiators heat registers stoves or other apparatus including amplifiers that produce heat Do not defeat the safety purpose of the polarized or grounding type plug A polarized plug has two blades with one wider than the other A grounding type plug has two blades and a third grounding prong The wide blade or the third prong are provided for your safety If the provided plug does not fit into your outlet consult an electrician for replacement of the obsolete outlet Protect the power cord from being walked on or pinched particularly at plugs convenience receptacles and the point where they exit from the apparatus 11 Only use attachments accessories specified by the manufacturer Use only with the cart stand tripod bracket or table specified by the manufacturer or sold with the apparatus When
15. ration of noise in some cases FOSTEX DISTRIBUTORS LIST IN EUROPE Including non EU countries as of January 2005 lt AUSTRIA gt NAME ATEC Audio u Videogeraete VertriebsgesmbH ADD Im Winkel 5 A 2325 Velm Austria TEL 43 2234 74004 FAX 43 2234 74074 lt BELGIUM gt NAME General Audio ADD Raymond Pelgrimslaan 101 B 1702 Groot Bijgaarden Belgium TEL 32 2 4630650 FAX 32 2 4661500 lt DENMARK gt NAME SC Sound ApS ADD Malervej 2 DK 2630 Taastrup Denmark TEL 45 4399 8877 FAX 45 4399 8077 lt FINLAND gt NAME Noretron Oy Audio ADD P O Box 22 FIN 02631 Espoo Finland TEL 358 9 5259330 FAX 358 9 52593352 lt FRANCE gt NAME Sennheiser France ADD 128 bis avenue Jean Jaures 94851 Ivry sur Seine Cedex France TEL 33 1 4987 0300 FAX 33 1 4987 0324 lt GERMANY gt NAME Mega Audio GmbH ADD Stromberger Str 32 D 55411 Bingen Germany TEL 49 6721 94330 FAX 49 6721 32046 lt GREECE gt NAME Bon Studio S A ADD 6 Zaimi Street Exarchia 106 83 Athens Greece TEL 30 210 3809 605 606 607 608 FAX 30 210 3845 755 210 3827 868 lt ICELAND gt NAME I D elrf electronic Ltd ADD ARMULA 38 108 REYKJAVIK ICELAND TEL 354 588 5010 FAX 354 588 5011 lt ITALY gt NAME Proel S p A ADD Zona Via Alla Ruenia 37 43 64027 Sant Omero Teramo Italy TEL 39 0861 81241 FAX 39 0861 887862
16. ve force and uneven surfaces may cause the appliance and cart combination to overturn personnel 18 The appliance should be situated away from drops of water or 7 Wall or Ceiling Mounting The appliance should be mounted to spray of water a wall or ceiling only as recommended by the manufacturer 19 Objects containing liquid such as vase must not be put on the 8 Ventilation The appliance should be situated so that its location appliance or position dose not interfere with its proper ventilation 20 The appliance is not completely isolated from the power supply For example the appliance should not be situated on a bed even if the power switch is at off position sofa rug or similar surface that may block the ventilation 21 Apparatus shall not be exposed to dripping or splashing and no openings or placed in a built in installation such as a bookcase objects filled with liquids such as vases shall be placed on the or cabinet that may impede the flow of air through the ventilation apparatus openings 22 Only use attachments accessories specified by the 9 Heat The appliance should be situated away from heat sources such as radiators heat registers stoves or other appliances including amplifiers that produce heat 10 Power Sources The appliance should be connected to a power supply only of the type described in the operating instructions or as marked on the appliance manufacturer 23 An appliance with a pr
17. y As a result the NX 6A offers a rich low frequency sound with minimum distortion Furthermore by using the UDR tangential edge for the woofer edge it eliminates the unnecessary resonance and achieves pure and clear sound reproduction see Figure 1 a i Radial paper forming technology Using the radial paper forming technology speaker dia phragms are made from compound materials pulp fiber etc in a radial shape This technology allows you to make diaphragms with the desired thickness and strength which results in improving the speed and extent of a sound UDR Up Down Roll tangential edge A revolutionary technology is used for the NX 6A woofer edge The edge is created by joining up roll and down roll at their tangential surfaces while utilizing FEM model analysis to determined the optimum bonding points The UDR tan gential edge is adopted to the edge of the NX 6A woofer X Pi e Tweeter featuring magnesium diaphragm The 20 mm hard dome tweeter employs the magnesium dia phragm This tweeter produces natural and extended high frequencies while eliminating a peculiar sound which most metallic tweeters may produce see Figure 2 HP sound reflectors The two HP sound reflectors are installed in the enclosure as shown in Figure 3 In the NX 6A enclosure micron wool is also placed appropriately This configuration reflects the sound in the enclosure dif fusely and creates the condition where statio
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