INSTALLATION MANUAL
Contents
1. KEF Reference Series Model 40B Subwoofer INSTALLATION MANUAL Front Panel Controls and Indicator See Section 4 1 Volume Control See Section 4 1 1 Mains Indicator See Section 4 1 3 Frequency Control See Section 4 1 2 Figure 1 Rear Panel Sockets See Section 4 2 Amana mn A O Input sockets See Section 4 2 1 Direct output sockets See Section 4 2 2 O High Level Input terminals See Section 4 2 3 AC Power Input Section See Section 4 2 4 n te SAFETY INSTRUCTIONS EXPLANATION OF GRAPHICAL SYMBOLS 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 products enclosure that may be of a 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 Please take heed of the following before using the KEF Model 40B Note also that the word appliance shall refer to the KEF 40B subwoofer or any part of it 1 Read Instructions All the Safety and Operating Instructions should be read befor2. A A 5 4 5 5 6 0 6 1 6 2 Pres If you do not have a pre amp output facility that is one that varies up and down as your main volume control rises and falls then you can only use the Left and Right High Level inputs which should be connected to your amplifier Left and Right speaker outputs respectively See Section 4 2 3 l Amplifier Connections All connections should be made with the subwoofer switched OFF Furthermore it is advisable that all other equipment should be switched off prior to making any changes This will reduce the possibilities of faults occurring during the setting up process All signals fed to the Model 40B should be adjustable from the source equipment such as the AV amplifier Under no circumstances should the Model 40B be connected to amplifier Record Output sockets as there is no control of volume from these outputs System Fine Tuning Once positioned within the room the controls on the Model 40B may only need to be adjusted infrequently Indeed the rear panel controls have been placed there to prevent continuous and confusing adjustment However in fine tuning your Model 40B subwoofer you may notice that small changes in the positions of the controls may make significant differences in the sound KEF advises you to alter one control at a time so that you can confirm the effect is as required FAULT DIAGNOSIS Trouble Shooting Guide In the first instance if the subwoofe
3. FOR UK The mains lead is terminated with a moulded three pin plug Should the plug on the flexible cord not be of the type for your socket outlets do not use an adaptor but remove the plug from the cord and discard Carefully prepare the end of the supply cord and fit a suitable plug IMPORTANT The wires in this mains lead are coloured in accordance with the following code Green and Yellow Earth Blue Neutral Brown Live As the colours of the wires in the mains lead of this appliance may not correspond with the coloured markings identifying the terminals in your plug proceed as follows The wire which is coloured Green and Yellow must be connected to the terminal in the plug which is marked with the letter E or by the earth symbol or coloured Green or Green and Yellow The wire which is coloured Blue must be connected to the terminal which is marked by the letter N or coloured Black The wire which is coloured Brown must be connected to the terminal which is marked with the letter L or coloured Red FOR USA The mains lead is terminated with a moulded three pin US plug FOR EUROPE l A mains lead compatible with national earthing standards and complying with the local safety requirement is supplied Reference Series Model 40B Contents List 1 0 Introduction 2 0 Features 2 1 Magnetic Shielding 3 0 Unpacking Handling and Aftercare 3 1 Unpacking 3 2 Handling and Aftercare 4 0 Controls and General O
4. Should service be required notify the dealer from whom you purchased the equipment and have him arrange onward shipment to KEF AUDIO UK LIMITED or an authorised agent if he confirms the need for factory attention Do not despatch goods without the prior agreement of KEF or their authorised agents If asked to return products for inspection and or repair pack carefully preferably in the original cartons and returned prepaid Insurance is recommended as goods are returned at owner s risk KEF or their authorised agents cannot be held liable for loss or damage in transit Packing insurance and freight on the return journey will be paid by KEF if warranty work proves to be necessary Failure to register in no way limits or invalidates the Warranty but in the event of service being required delay may result since our Service Department cannot begin Warranty work until the original sale has been verified FOR USA ONLY This KEF loudspeaker is warranted to the original purchaser against original factory defects in material or workmanship for a PERIOD OF ONE YEAR FROM THE DATE OF ORIGINAL PURCHASE This warranty is only valid in the country of purchase This warranty is non transferable and is valid for the first original purchaser purchasing from an Authorized Dealer of KEF products Only Authorized Dealers represent themselves as such and purchasers may confirm the status of Authorized Dealers by calling KEF Electronics of America Inc
5. more bass there hasn t been a lot of choice certainly not as far as dedicated subwoofers for Home Theatre are concerned With sights firmly fixed on producing bass cleanly dynamically and effortlessly KEF have designed and produced a high quality subwoofer that will fully complement any Dolby Pro Logic surround sound system yet is equally at home if used as an add on to a conventional hi fi system where the subwoofer can be used to augment the bass output of small satellite loudspeakers Dolby is a registered trademark of Dolby Laboratories Licensing Limited 2 0 FEATURES The Model 40B is a medium sized one way two driver floorstanding subwoofer designed to operate in free space away from side and rear walls A high quality internal Amplifier drives the two 200 mm 8 bass drive units mounted in Twin Coupled Cavity configuration The Model 40B has been designed to be used from the outset with the best quality Dolby Pro Logic Home Theatre systems Bass frequencies are output to the room through a specially designed contoured letter box on the Front Panel Model 40B may also be used to enhance hi fi systems where the loudspeakers have been designed to produce little or no bass extension on their own Connection to the Amplifier is by way of either gold plated phono input sockets or by 4 mm binding posts These enable the 40B to be used with many different types of ancillary equipment Note that the Model 40B does NOT
6. 40B internal Amplifier See Figure 3 Use a good quality speaker cable for connection to your amplifier a heavy gauge cable is not required unless you are parallelling your satellite speakers to the High Level Input terminals LEFT RIGHT gt efp jle SATELLITE SATELLITE ef gle SPEAKER SPEAKER Mo LEFT RIGHT SATELLITE SATELLITE SPEAKER SPEAKER A pese a e a SUBWOOFER e CAST ei nai i ide o ia i COSA spat AMPLIFIER CISSE MODEL 40B AMPLIFIER SUBWOOFER Figure 4 A A Figure 3 Note that the internal subwoofer amplifier has a relatively high input impedance which should not affect the stability of your existing amplifier output 4 24 AC Power Input Section Y A combined mains power input connector is provided which incorporates a connector power Prior to making any connections to the High Level Input terminals please ensure that the f x RS CE 8 any 8 dl switch and mains fuse A three core mains lead is supplied in the Accessory Pack Model 40B and your existing amplifier are switched OFF and that each cable connected to a specific High Level Input terminal does not touch any other terminal otherwise damage to your amplifier may occur Check before connecting to your local mains supply th
7. 62 cu ft Amplifier Output Power 150 W Unbalanced Signal Inputs RCA phono sockets Balanced Signal Inputs 4 mm Binding Posts Input Impedance 22 KOhms Unbalanced 100 kOhms Balanced Low Level Signal Outputs Unfiltered Direct output sockets Net Weight 28 9 kg 63 6 Ib Dimensions hx wx d mm 565 x 280 x 480 in 22 2 x 11 0 x 18 9 Power Requirements USA Canada 110 120 V ac 60 Hz Europe 220 240 V ac 50 Hz UK 240 V ac 50 Hz Power Consumplion 250 VA both channels driven at full output KEF Audio reserve the right in line with continuous research and development to amend or change specifications without prior notice E 8 O E March 1994 vet ACUDA AAC SD SEESE m TASAS REEDERI SAS NAAA ACLARAR CERO IS SD ino inse PO SCA SO TN KEF The experience of sound KEF AUDIO UK LIMITED Eccleston Road Tovil MAIDSTONE Kent ME15 6QP UK Telephone No 44 0 622 672261 Fax No 44 0 622 750653 Distributed in U S A by KEF ELECTRONICS OF AMERICA INC 89 Doug Brown Way Holliston MA 01746 USA Telephone No 1 508 429 3600 Fax No 1 508 429 3699 Part No PL878EF
8. If sound is still not apparent from the subwoofer contact your local supplier for further advice Warranty Your KEF Model 40B loudspeaker is guaranteed against manufacturing defects for a period of 1 year from the original date of purchase and in the country of purchase This warranty is in addition to your statutory rights as a consumer However failure of the loudspeaker due to abuse improper or inappropriate use and or operation or damage caused by other faults in your system are NOT covered within the terms of the guarantee For warranty details in the UK and USA please see below For other countries please contact the local KEF Authorised agent If you are unsure of your local agent please contact KEF Audio UK Limited at the address given below FOR UK ONLY This precision engineered KEF Model Model 40B subwoofer is guaranteed against faulty material and workmanship for a period of 1 year from the date of original purchase subject to the following restrictions 1 This warranty is only valid in the country of purchase and applies to the first purchaser only 2 That the equipment has not been disassembled modified or tampered with by any person other than an expressly authorised representative of KEF Audio UK Limited 3 That the equipment has not been abused or operated in conjunction with unsuitable or faulty apparatus 4 That the equipment has not suffered mechanical damage or derangement in transit
9. at the local supply voltage is the same as that marked on the rear panel If it is not check with your supplier before proceeding It is recommended that under normal conditions the rear power switch should be switched OFF when the subwoofer is not being used For specific markets an appropriate power lead is supplied The mains fuse is dependant on the local mains supply voltage and should be a 20 mm cartridge type anti surge fuse For 220 240 V operation the fuse should be a T2 5 Amp type For 100 120 V operation the fuse should be a T5 Amp rating type 5 0 5 1 5 2 5 3 INSTALLATION Speaker Placement and Room Acoustics Whilst bass frequencies are generally regarded as being omni directional some listeners may notice the low frequency sounds coming from the subwoofer This effect may be due to many factors such as closeness to room boundaries room construction internal room volume distance between the main speakers and the subwoofer etc It should also be noted that no part of the subwoofer is designed to operate in a damp environment nor will it benefit from immersion in liquids Storage and operating temperatures in the range 5 C to 45 C are considered satisfactory Speaker Positioning There are no hard and fast rules that will dictate which is the best position in your particular room however whilst it is impractical to expect you to constantly move the subwoofer around the room to get the b
10. e 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 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 in or near water for example near a bathtub washbowl kitchen sink laundry tub in a wet basement or near a swimming pool and the like 6 Carts and Stands The appliance should be used only with a cart or stand that is recommended by the manufacturers Furthermore said cart or stand should be moved with care Quick stops excessive force and uneven surfaces may cause the appliance cart combination to overturn 7 Wall or Ceiling Mounting The appliance should be mounted to a wall or ceiling as recommended by the manufacturer 8 Ventilation The appliance should be situated so that its location or position does not interfere with its proper ventilation For example the appliance should not be situated on a bed sofa rug or similar surface that may block any ventilation openings or placed in a built in installation such as a bookcase or cabinet that may impede the flow of air through the ventilation openings 9 Heat The appliance should be situated away from heat sources such as radiators heat registers stoves or other appliances including amp
11. erated with faulty or unsuitable equipment IN NO EVENT SHALL THE WARRANTOR BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES whether damages result from breach of express or implied warranties tort negligence or otherwise Some states do not allow exclusion or limitation of incidental or consequential damages so the above limitation or exclusion may not apply to you This warranty gives you specific legal rights and you may also have other rights which vary from state to state Servicing The Model 40B subwoofer consists of both passive loudspeaker drive units and a single active component known as an Amplifier Whilst the drive units are inherently reliable and rarely give trouble it is important to remember that should a fault occur in any part of the reproducing system the fault is likely to be heard via the loudspeakers Therefore when faults arise careful and analytical diagnosis will be required to locate the actual source of the problem Loudspeaker drive units cannot generate hiss or hum Spurious noises of this type generally originate in the electronic sections of the equipment or even in the programme source itself If you suspect that the Model 40B is faulty take time to first confirm that the fault occurs on different programme sources of your equipment A fault which is evident only when playing CD s but not for example when using a laser disc player is unlikely to originate with the Model 40B subwoofer Due to the way i
12. est sound some experimentation is still likely to be required As a start we would recommend the following Position the subwoofer in a direct line between and equidistant from each of the two main front channel speakers Take note that positioning the subwoofer in a corner or close to a wall will accentuate the low frequency output This may lead to the overall sound being too boomy If possible experiment with the position of the subwoofer within the room by playing different types of pre recorded material and taking note of which position offers the best sound balance with your chosen front channel speakers Fine adjustment of the Subwoofer output level may also be required to get the best integration of sound pressure levels Home Theatre Hi Fi System useage Surround sound products are now available that do not fit a specific category The surround sound processor in your Home Theatre system may be incorporated within a pre amplifier an integrated amplifier or a receiver tuner amplifier Alternatively you may have a separate dedicated processor Whichever component you have will have its input and output sockets clearly marked Please ensure that you take time to identify the position of each of these sockets as care taken now will ensure that the subwoofer is connected correctly and that it will work optimally There are some choices that you will need to make when deciding how to connect your Home Theatre system to the Model 40B sub
13. lifiers 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 11 Grounding or Polarisation The precautions should be taken so that the grounding or polarisation means of an appliance are 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 13 Cleaning The appliance should be cleaned only as recommended by the manufacturer 14 Non use Periods The power cord of the appliance should be unplugged from the outlet when left unused for a long period of time 15 Object and Liquid Entry Care should be taken so that objects do not fall and liquids are not spilled into the enclosure through openings 16 Damage Requiring Service The appliance should be serviced 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 e The appliance has been dropped or the enclosure damaged 17 Servicing The user shall not atte
14. mpt to service the appliance beyond that described in the Operating Instructions All other servicing should be referred to qualified service personnel SAFETY INFORMATION WARNING TO REDUCE THE RISK OF FIRE OR ELECTRICAL SHOCK DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE O A combined mains power input connector is provided which incorporates a connector power switch and mains fuse A three core mains lead is supplied in the Accessory Pack CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION TO REDUCE THE RISK OF ELECTRIC SHOCK O Check before connecting to your local mains supply that the local supply voltage is the same as that marked on the rear panel If it is not check with your supplier before proceeding Under normal conditions the rear power switch may be left ON However it is good practice to switch off the mains with this switch if you are going on vacation or if the subwoofer is not going to be used for an extended period of time For specific markets an appropriate power lead is supplied DO NOT REMOVE COVER OR BACK NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED SERVICE PERSONNEL O The mains fuse is dependant on the local mains supply voltage and should be a 20mm cartridge type anti surge fuse For 220 240 V operation the fuse should be a T2 5 Amp type For 100 120 V operation the fuse should be a TS Amp rating type WARNING THIS APPLIANCE MUST BE EARTHED
15. n which the 40B is designed to work it may not be possible to establish whether the fault is specific to the subwoofer or the other equipment in your system If this is the case then please contact your supplier who can offer more specific guidance on solving the problem The Model 40B contains no user serviceable parts inside Should servicing be required you should in the first instance contact the dealer from whom the subwoofer was originally purchased Generally warranty claims are best handled by your dealer However in case of difficulty please contact Customer Service Department KEF Audio UK Limited Eccleston Road Tovil MAIDSTONE Kent ME15 6QP UK Telephone No 44 0 622 672261 Fax No 44 0 622 750653 Distributed in U S A by KEF Electronics of America Inc 89 Doug Brown Way Holliston MA 01746 USA Telephone No 1 508 429 3600 Fax No 1 508 429 3699 11 eect 7 0 TECHNICAL DATA AND SPECIFICATIONS Aman a A I Product Model 40B Description Powered subwoofer LF Drive Units 2 x 200 mm 8 in Paper Coned Magnetically Shielded Drive Units Frequency Range 35 Hz 150 Hz The upper frequency cut off point of the subwoofer is continuously variable between 50 Hz and 120 Hz Maximum Output 111 dB Enclosure Type Twin Coupled Cavity Internal Volume LF 42 litres 0
16. orporated at 508 429 3600 WHAT WE WILL DO Should your KEF loudspeaker fail to function because of a manufacturing defect KEF will repair or replace it free of charge If the product is still defective after a reasonable number of attempts by the warrantor to remedy the defect you may elect a refund of the purchase price or replacement without charge Before a refund or replacement can be made the product must be free of all liens and other encumbrances HOW TO OBTAIN SERVICE Should service be required contact the Authorized KEF Dealer from whom you purchased the equipment and have him arrange warranty repair or onward shipment to KEF Electronics of America In the event that shipment to KEF becomes necessary return the product prepaid only after receiving written authorization and instructions from the dealer Include a written description of the claimed defect and your original sales slip or other proof of ownership and date of purchase 10 etna hee senate veal Dm IR 6 3 We strongly recommend that speakers be packed in their original cartons and packing material and that all shipments be insured KEF cannot be responsible for loss or damage in shipment Packing insurance and return freight will be paid by KEF if work covered under the warranty is necessary WHAT IS NOT COVERED This warranty does not cover a loudspeaker system which has been 1 damaged while in your possession 2 overloaded abused misused or op
17. peration 4 1 Front Panel Controls and Indicator 4 1 1 Volume Control 4 1 2 Frequency Control 4 1 2 Mains Indicator 4 2 Rear Panel Sockets 4 2 1 Input sockets 4 2 2 Direct output sockets 4 2 3 High Level Input terminals 4 2 4 AC Power Input Section 5 0 Installation 5 1 Speaker Placement and Room Acoustics 5 2 Speaker Positioning 5 3 Home Theatre Hi Fi System useage 5 4 Amplifier Connections 5 5 System Fine Tuning 6 0 Fault Diagnosis 6 1 Trouble Shooting Guide 6 2 Warranty 6 3 Servicing 7 0 Technical Data and Specifications Thank you for purchasing the KEF Reference Series Model 40B powered subwoofer We are confident that your 40B will provide reliable high performance sound for many years to come Please read this manual fully before you attempt any connections to the Model 40B 1 0 INTRODUCTION For over 30 years KEF have designed and built high quality loudspeakers for both domestic and professional users With great care and attention to detail KEF have sought to improve its products based on its gains in acquired knowledge such that we are able to manufacture products that confirm our continuing commitment to excellence in sound In general terms the amount of bass produced by a loudspeaker is proportional to its size the bigger the cabinet the more bass you get However for the user who doesn t want large loudspeakers dominating their living room or who are pleased with their existing speakers but who want
18. provide a filtered output to drive satellite speakers 2 1 Magnetic Shielding A design feature of the Model 40B is it s magnetically shielded drivers The magnets of both bass drive units are mounted within steel cans which contain flux cancelling magnets This arrangement reduces the external magnetic field around the loudspeaker significantly reducing the picture distortion that can be caused by conventional unshielded loudspeakers Some televisions may be more sensitive to the location of external magnetic fields despite this shielding If in doubt please consult your dealer 3 0 UNPACKING HANDLING AND AFTERCARE 3 1 Unpacking On the side of the shipping carton and on the rear panel of the subwoofer there is a description of the mains voltage that applies to the Model 40B you have purchased Ensure that this voltage is correct for your area If it is not contact the dealer from whom you purchased the Model 40B Under no circumstances should you connect the Model 40B to an inappropriate supply voltage 3 2 4 0 4 1 4 1 1 4 1 2 4 1 3 4 2 The Model 40B subwoofer is packed as one speaker per carton Unpack the speaker carefully and inspect for any visible sign of damage Your speaker left KEF in perfect condition If any damage is apparent notify your dealer immediately Retain the packaging in case a need arises for you to transport the subwoofer at a later date If space permits retain the original packaging
19. put level of subwoofer in relation to the satellite or AV speakers Clockwise rotation of the control will increase the output level of the subwoofer such that when the 0 mark on the knob is set to twelve o clock full output may be achieved Frequency control The variable Frequency Control changes the subwoofer upper cut off frequency Its effective range is from 50 Hz to 120 Hz at a rate of 24 dB per octave Clockwise rotation of the frequency control increases the cut off frequency and accordingly increases the range over which the subwoofer works Adjust this control for the smoothest integration of sound between the main speakers and the subwoofer Mains Indicator A single red led positioned between the two Front Panel controls is illuminated if the rear mains switch is ON REAR PANEL SOCKETS The rear panel of the Model 40B Amplifier incorporates the Input sockets Balanced and Unbalanced Direct output sockets and the AC Power Input You should connect your amplifier to either the Input phono sockets or to the High Level Input terminals 4 2 1 Input sockets Low level O One pair of phono sockets is provided for the low level Left channel input coloured White and Right channel input coloured Red to the subwoofer If your amplifier has an external processor OUT socket facility then the low level external proces
20. r does not appear to work at all make the following checks to ensure that the fault is not due to another part of the system malfunctioning or not working correctly If the Front Panel Power led light does not come on when the rear panel mains switch is ON and you have confirmed that the local supply voltage is the same as the setting for the Amplifier then check that your mains plug is correctly wired into your local supply and that the IEC socket is pushed firmly into the corresponding connector on the rear panel of the Model 40B Then check any local house fuses as well as the rear panel fuse If the Front Panel led still doesn t come on then check with your local supplier as to your next course of action If visual indication is shown but no sound comes from the Model 40B then you should check the following Ensure that the source equipment and the Model 40B are switched ON Confirm that the Model 40B Volume Level adjustment is set correctly Confirm that the output sockets on the source equipment are correctly switched and adjusted to provide sufficient level to drive the subwoofer Confirm the integrity of all connections both at the Model 40B Sud and the source equipment end Ensure that the subwoofer is switched OFF when you do this Note that no sound will come from the subwoofer unless a signal is fed to it from the source equipment It is helpful if the source material used is particularly rich in bass output
21. sor output of your amplifier may be connected to the Input of the subwoofer Use a good quality screened interconnect cable to connect your amplifier to the Model 40B Refer to your amplifier instruction manual for guidance on how to use its external processor facility See Figure 2 LEFT RIGHT ela 0 SATELLITE SATELLITE g are SPEAKER SPEAKER o are l ejo d a 2 A Slice sa PROCESSOR alia AMPLIFIER o 5 R R MODEL 40B SUBWOOFER 2 0090 Figure 2 4 2 2 Direct output sockets Low level The phono type output sockets are linked internally to the Input sockets and can be used to feed the stereo Left and Right input signals to other equipment such as your external processor IN sockets or to a power amplifier Screened interconnect cables should be used when using these sockets See Figure 2 Ben i 4 2 3 High Level Input terminals O When using the High Level Input terminals it is quite acceptable to connect your satellite The 4 mm Binding Post terminals marked L and L for the Left channel input and R speakers to the High Level terminals rather than directly to your existing amplifier if this makes and R for the Right channel input enable the user to feed the speaker output of a stereo the installation of speaker cables easier See Figure 4 amplifier into the subwoofer for subsequent attenuation and filtering Bass frequencies are then boosted by the Model
22. that your Model 40B was supplied in This will ensure safe transit should the Model 40B need to be transported if you are moving house or should servicing be required When unsuitable packaging is used to ship the Model 40B for service a charge may be made for the supply of new packaging when the product is returned to you Handling and Aftercare Please ensure that the Amplifier heatsink is not obstructed by soft furnishings curtain material deep pile carpet etc The surfaces of these cabinets may be cleaned with a slightly damp soft lint free cloth We do not recommend that the cabinet is exposed to direct sunlight or high temperatures Nor should the subwoofer be allowed to become wet CONTROLS AND GENERAL OPERATION FRONT PANEL CONTROLS AND INDICATOR There are two user adjustable controls located on the front panel The control marked with the figures 0 9 ce is the Volume Control and the right hand control marked 120 80 50 is the Frequency Control See Figure 1 To adjust either control push the centre of the spring loaded knob and the control will latch outwards towards you The control may now be adjusted to suit your personal preference using the graduation mark located at the twelve o clock position Once set to the users preferred setting each control may be pushed in such that it is then latched into the flush position Volume Control The Volume Control allows the user to vary the out
23. woofer You may need the instruction book that came with your system to answer some of these questions For use with Dolby Pro Logic and Surround Sound systems The output from either Dolby Pro Logic or Surround Sound products can be fed to the Input sockets if you have a stereo output If you have only a single mono subwoofer output on your amplifier processor you should feed the signal to the Left channel input socket and then connect a single phono phono lead from the Left channel output socket to the Right channel input socket If your Home Theatre system amplifier does not have any line level RCA Phono output sockets available You can only use the speaker output from your integrated or power amplifier Connect your amplifier speaker output terminals to the Model 40B Left and Right High Level inputs using good quality speaker cable See Section 4 2 3 This need not be a heavy or thick gauge as the Model 40B will not be drawing any current You should ensure that when you connect these additional speaker cables to your amplifier that no stray strands of cable touch any of the other terminals as damage may be caused to your amplifier power amplifier For use in stereo hi fi systems Connect the Left and Right pre amplifier output sockets to the Input sockets on the rear of the Model 40B Amplifier using good quality screened cables The feed to your power amplifier can then be taken from the Direct output sockets on the rear of the subwoofer
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