B&K VMR-6.5.4 User's Manual
Contents
1. SPECIFICATIONS Power Rating 8 ohms h 60 watts ve Frequency Response o 5Hz 45KHz Input Sensitivity si 900 millivolts THD S N 0 09 1kHz 1 7 input Impedance 24 300 ohms l Damping Factor 100 50Hz Current 14 amps peak peak Slew Rate 14 volts microsecond Dynamic Headroom S N A weighted Voltage Gain Line Power 1 40B si sl 95dB ta as To 120VAC Fuse 12A Slo Blo Dimensions Weight Specifications Subject To Change Without Notice 17 W x 15 5 d x 5 25 h O A 35 Ib 16 0Kg DO Limited Warranty B amp K Components Ltd referred to herein as B amp K warrants your B amp K equipment against all defects in material and workmanship for a period of three years from date of purchase This warranty applies only to the original purchaser and only to equipment in normal residential use and service Defective equipment must be returned to B amp K prepaid accompanied by payment to cover the cost of return shipping and handling and will be repaired or replaced at the discretion of B amp K whose decision as to the method of reparation will be final This warranty shali not apply to any equipment which is found to have been improperly installed incorrectly fused misused abused or subjected to harmful elements used in any way not in accordance with instructions supplied with the unit or to2. VMR G 5 4 6 Channel A V Amplifier OWNER S MANUAL B amp K COMPONENTS Ltd CAUTION Aa RISQUE DE CHOC ELECTRIQUE ATTENTION JERAS uva TO PREVENT FIRE OR SHOCK HAZARD DO NOT WARNING FXPOSF THIS UNIT TO RAIN OF MOISTURE CONTENTS B amp K Repeatability The VMR 6 5 4 Its Purpose and Function Design and Construction Setting up the VMR 6 5 4 Safety amp Care Considerations The Inputs and Outputs System Installation Making the Connection Setup and Checkout Alternate System Configurations In Case of Difficulty Fig 2 Rear Panel Diagram Fig 3 Speaker Wiring Diagram __Fig 4 Layout Diagram Specifications Warranty Inside Back Cover mom wm ola milo ol PPR Oo pw o py my IFC DO Repeatability your assurance of a product reliability In days gone by the term created carefully by skilled craftsmen exemplified the meaning behind quality assurance In the modern manufacturing environment those same skilled craftsmen now design the processes that allow the economies of volume manufacturing while still retaining the same high standards of quality Repeatability is the B amp K house term for a quality assurance philosophy that is the culmination of several well engineered manufacturing processes The four most important of these are a a man
3. The keystone of B amp K Components Ltd success is based on taking the quality and consistency of our products and the needs of our customers very seriously Therefore when you make an investment in a B amp K audio product we feel sure your satisfaction with its musical consistency and solid operational reliability will increase with each passing day Also should you ever have a question about or a problem with any B amp K product we are but a phone or FAX call away Thank you for choosing a B amp K audio product You will not be disappointed Happy listening BO B amp K Components Ltd Buffalo New York THE VMR 6 5 4 ITS PURPOSE AND FUNCTION An exciting and reliable source of high fidelity audio signal amplification the VMR 6 5 4 offers excellent versatility and cost effectiveness for most multi channel home entertainment systems The VMR 6 5 4 is primarily a 6 channel amplifier capable of delivering a clean fully musical 60 watts r m s power output per channel 8 ohm load As well the VMR 6 5 4 offers a bridging feature which allows those 6 channels to be combined into three more powerful Channels This presents an opportunity to use the VMR 6 5 4 in a number of configurations for a variety of uses the standard 6 channel mode or a 5 4 or 3 channel mode Such versatility makes the VMR 6 5 4 a particularly compact source for a multiplicity of surround sound or multi room applications While the B amp K Co
4. The instruction manual enclosed with the speaker will usually guide you through the connection process AVOID SPEAKER AMPLIFIER DAMAGE 1 OBSERVANCE OF POLARITY IS ESSENTIAL DOUBLE CHECK CONNECTIONS BEFORE TURNING THE AMPLIFIER ON THE AMPLIFIER CAN BE DAMAGED IF POLARITIES ARE INCORRECT DAMAGE CAN OCCUR TO YOUR SPEAKERS IF THE POWER RATING OF EACH INDIVIDUAL DRIVER IS EXCEEDED BY THE AMPLIFIER ENSURE THAT ALL THE DRIVERS IN YOUR SPEAKER SYSTEM ARE CAPABLE OF HANDLING NOT ONLY THE POWER BEING DELIVERED BY THE AMPLIFIER S BUT THE ENERGY THAT IS LIKELY TO BE GENERATED DURING STRONG PASSAGES IN CASE OF DIFFICULTY No sound ON LED not illuminated Power cord not plugged in Reconnect power cord Power off at AC source Check AC source switch fuse etc Internal tuse blown or faulty Check for shorts or overloading No sound on some or all selected channels speaker leads loose ar faulty Tighten repair or replace cable Line stage to amp cables loose or faulty Tighten repair or replace cable Source to line stage cables loose or faulty Tighten repair or replace cable Line stage or source not correctly selected Check all switch settings Sound directionless bass weak Speakers connected out of phase Check connections making sure that cables are connected to and to Loud hum or buzz on one ar more channels Poor gound connection in interconnect cabling Check all connectors and repair
5. as necessary If unit continues to blow fuses have it serviced DO NOT USE A HEAVIER FUSE LEVEL CONTROLS 3 5 Ai 6 CHANNEL 5 4 CHANNEL 3 Ei di TN 2 Ei LEVEL CONTROLS 5 CHANNEL e i et Ea INPUTS MIRROR view OF THE VMR 6 5 4 s REAR PANEL 2 CHANNEL 1 b This partial view in reverse of the VMR 6 5 4 rear panel may fas if you are attempting to locate a specific connector and must do so by reaching over the top of t e amplifier from the front The graphics have been reversed back to normal to make them easier to decipher Fig 3 The two configurations shown represent the most common forms of wiring the speaker Always double check to make sure polarity is correct SPF AKER a STANDARD WIRED VMR 6 5 4 SPEAKER CONFIGURATION ib EUWIRED SPEAKER CONFIGURATION le ele sie VMR 6 5 4 ter CO CH LGIH Fig 4 diagram showing a multichannel layout of up to 6 channels using the VMR 6 5 4 as the main amplifier The Blocks adjacent to each speaker location can be used ta enter information on how you have your system setup There is aiso a listing point for source outputs in the event you are driving the amplifier from something other than a single multi channel more than 2 channel source o Y ncas O W CHANNEL LGTH SOURCE Ss cH LGTH
6. have been modified repaired or altered in any way withou the expressed written consent of B amp K No warranty implied or otherwise created by State law shall extend beyond the term of this warranty and B amp K shall not be liable for any incidental or consequential damage arising out of a defect in material or workmanship of the unit during the term of this warranty or thereafter Some States do not allow the exclusion or limitation of incidental or consequential damages and the foregoing exclusions may not apply to you This warranty gives you specific legal rights You may also have other rights which vary from State to State No agent representative dealer or employee of B amp K has the authority to increase or alter the obligatians or terms of this warranty B amp K Components Ltd RETURNING EQUIPMENT No equipment may be returned to B amp K Components Ltd without a RETURN AUTHORIZATION Should you find it necessary to return equipment to B amp K for any reason a RETURN AUTHORIZATION RA number must be issued by B amp K in respect of the equipment being returned You may request an RA number by calling or FAXing B amp K at the numbers below We ask that you provide the following information at that time 1 Your name and address 2 The model and serial number of the equipment being returned 3 A description of the problem being experienced Your call will be referred toa Technical Service Representative who will
7. work with you to resolve the problem If it is determined that the unit must be returned for repair an RA number will be issued and an RA package will be forwarded to you by First Glass mail This package will contain a copy of the Return Authorization instructions on how to return the unit and a return shipping label for your shipping container Please Note There are times when It may be necessary for the Technical Service Representalive to retum your call Current technical service hours are Monday through Thursday excluding holidays 1 00pm through 4 00pm EST LIST YOUR UNIT INFORMATION HERE MODEL No SER No PURCHASED AT B amp K Components Ltd 2100 Old Union Road Buffalo NY 14227 amp 716 656 0026 FAX 716 656 1291 DATE PURCHD CAUTION RISK DF ELECTRIC SHOCK DO NOT OPEN RISQUE DE CHOG ELECTRIQUE ATTENTION NE PAS OUVAI4 e TO PREVENT FIRE OR S OG lt HAZARD DO NOT WARNING FXPOSF THIS UNIT TO RAIN OR MCISTURE copyright 1992 B amp K Components Ltd 2100 Old Union Road Buffalo NY 14227 Tel 716 656 0026 FAX 716 656 1291
8. ECKOUT The next task will require that you listen to a source sampling tape CD etc noting the levels at each point within the system During the initial listening situation you may find the dispersion of sound to be unbalanced This could be the result of where you are in relation to the speakers It could also be the room acoustics or it could be the manner in which the signal is being distributed in the stages prior to the amplifier The VRM 6 5 4 provides you with level controls for each channel so you can adjust the relative volume of each channel to suit your personal taste While initial audio quality will be very good it should get even better Most high performance audio amplifiers require about 40 hours of circuit forming burn in time before maximum fidelity will be fully realized Helpful Hint Some audiophiles prefer to inaugurate the system as a unit preamplifier cables and amolifier If this is your preference you might try playing a CD into the system for about 24 hours straightfspeakers connected at a low but listenable volume level as one method of forming the components and signal pathways Should you encounier any inconsistencies that cannot be traced to the source or the material being played consult the IN CASE OF DIFFIGULTY in this manual ALTERNATE SYSTEM CONFIGURATIONS CHANNEL BRIDGING Channels 1 amp 2 3 amp 4 and 5 amp 6 are available for bridging in order to provide 3 channels capabie of prov
9. ct somewhat like one person trying to hold on to the end of a rope while another person at the other end is jerking it at random intervals Therefore we recommend that you AVOID CONNECTING THE PREAMPLIFIER OR THE SOURCE COMPONENTS TO THE SAME POWER SOURCE AS THE AMPLIFIER To do so may subject the preamplifier and its sources to power line modulation interference which could affect the operation of the component thereby resulting in a degraded audio signal from the source THE INPUTS AND OUTPUTS Located on the rear panel they are INPUT There are 6 input signal connections to the VMR 6 5 4 amplifier through high quality gold plated connectors They accommodate audio cables utilizing standard RCA plugs See Fig t a TUE TPUT There are 6 high quality 5 way binding posts one for each channel They are designed to accept a banana type plug or a spade lug connector see Fig 1 b amp c DO NOT REMOVE CABINET FEET KEEP AMPLIFIER WELL VENTILATED AT ALL TIMES tb Spade lug c Double banana plug SYSTEM INSTALLATION CONSIDERATIONS There will most likely be a number of cables involved in the installation of your home entertainment system Therefore pre planning is essential in order to maximize system efficency We recommend the following as a means of helping you reach that goal Use the diagram on page 8 of this manual or make your own diagram of your proposed system to lay out the location o
10. f components the VMR 6 5 4 and the proposed cable runs between them in the room Number each cable and record its length on the drawing for future reference For example 3 IN 12 denotes input cable from source channel 3 and that it is 12 feet tong 1 OUT L REAR 20 denotes that 3 speaker output has been assigned to the left rear speaker and that its length is 20 feet Cable runs are critical in that they must be kept away from sources of power radiation amplifiers power cords heaters etc For the sake of safety they should also be kept out of traffic areas The process of optimizing the system will include the type of cable the length of run and the obstructions it must deal with along its run Your dealer can advise you on the products available and their relative merits If building custom length audio cables is not your strength your dealer should be able to help you with that as well If you would like to utilize the bridging option which converts two channels in order to create a more powerful single channel see the ALTERNATE SYSTEM CONFIGURATIONS section For the standard configuration of one channel source per input most of the planning will be in determining which input you wish to apply to which channel A typical connection diagram is shown in Fig 3 a For other methods of setting up your system see the section ALTERNATE SYSTEM CONFIGURATIONS MAKING THE CONNECTION 1 Before doing anything ensure that the
11. iding 120 watts r m s into an 8 ohm load However due to the relative complexity of the modification it is recommended that this conversion be carried out by your dealer s technician or at the B amp K factory in order to comply with warranty requirements For more information on bridging the VMR 6 5 4 please contact your dealer or B amp K directly BI WIRING Bi wiring has the potential of doing away with much of the mud associated with processing all incoming frequencies at one input on the crossover network As a result most frequencies especially the bass will appear tighter and more resiliant The mid range and the highs will be clearer How effectively this is accomplished will vary fram ane speaker design to another ALTERNATE SYST NEI TIONS cont BI WIRING AT THE AMPLIFIER Bi wiring consists of the simple act of running two sets of speaker cables from the designated channel s speaker output to each speaker and observing correct polarity connecting one set to the HI terminal and the other to the LO terminal A speaker with a bi wire option provides two inputs on the rear panel of each speaker enclosure or internally on the speaker s crossover circuit board There is usually one input for HI frequencies and one for the LO frequencies For normal operation these inputs will likely be bridged with some type of jumper configuration Usually it is a matter of removing these jumpers to allow biwiring See Fig 3 a
12. mponents Ltd VMR 6 5 4 is engineered to interact harmoniously with all popular sources and line stages the match that approaches perfection is that of being driven by any one of the excellent B amp K preamplifiers presently available DESIGN AND CONSTRUCTION The VMR 6 5 4 utilizes high quality electronic circuitry to achieve an environment wherein a detailed transparent and highly musical sound can be realized The high quality parts compliment includes state of the art solid state devices 1 metal film resistors computer grade electrolytic power supply capacitors and a high capacity toroid transformer The VMR 6 5 4 operates class AB employing very high current MOSFET power output stages As such it is capable of reproducing the most demanding digital or analog recordings at full rated power levels SETTING UP THE VMR 6 5 4 Placement of the amplifier is important and requires some pre planning In order to eliminate interference being induced in the amplifier by other components It must be physically located a safe distance away from all source components This will avoid their being influenced by the fields being propogated by the amplifier when it is under heavy load Ideally the VMR 6 5 4 will be located near the speakers This will minimize the adverse effects of inductance capacitance and any damping effect that might result from speaker wires interacting with the amplifier The VMR 6 5 4 is equipped with raised feet so that contin
13. power switch on the amplifier s front panel is in the off position Again it is recommended that you locate a separate AC power outlet for the VMR 5 5 4 one that is not shared by any other audio component in the system This will eliminate the possibility of the amplifier modulating the power being supplied to the component and compromising the signal originating from that component Locate the AC power supply cord and plug it into the power input receptacle in the rear panel Do not connect it to the AC power supply as yet Connect the audio cables from your preamplifier s output to the selected channel s input connectors Make note of the input number as suggested in the Considerations section above so that the correct speaker cable can be connected to the speaker output with the same number A rear panel connection guide is shown in Fig 2 a 4 Connect the cables from your speakers to the appropriate CHANNEL output KI TION cont Double check the cable connections both ends to ensure they are plugged into the correct jacks for the source L or R front rear or side and that the connection is tight With the volume gain control on your preamplifier set to full minimum or switched to mute plug the amplifier s power cord into the AC power source Turn the VMR 6 5 4 power switch on The panel light above the switch should be illuminated Place all level controls on the VMR 6 5 4 at maximum SETUP AND CH
14. ufacturing process that functions in exactly the same manner with each and every audio component b a comprehensive test of each and every component part prior to installation in the circuit board c final assembly by an experienced assembler and d a comprehensive functional test prior to final packaging As a first step towards manufacturing a repeatable component B amp K employs the use of the latest technology in automatic insertion equipment at their manufacturing facility in Buffalo New York Not only does this process provide a complete and exact duplication of each and every circuit board it imposes a full test of each individual component just prior to insertion in the circuit board Should any component fail the process is halted automatically It can only be resumed when the faulty component is replaced with a serviceable unit which itself must undergo the same testing procedure before the process can resume All assembly is done by technicians who are trained in the art of doing the job right the first time Following assembly the unit is tested rigorously for specification and reliability Only then is the unit packaged for shipment Our Pledge to You The decision to purchase an audio component is one you have not taken lightly We expect you will be seeking affirmation that your choice of a B amp K audio product was wise and practical and that it continues to meet your sonic expectations each time you turn it on
15. uous ventilation can be maintained As well they help to maintain acoustic feedback into the amplifier at a minimum They also provide a measure of protection against scratching any surface the unit might be resting on Note Acoustic feedback can be identified as low frequency vibrations which are not part of the signal from the source material They also have a tendency to become louder and less controllable as you increase the system volume The most common source of acoustic feedback interference is the result of having the preamplifier and source components too close to the loudspeakers SAFETY amp CARE CONSIDERATIONS CONNECTING AND DISCONNECTING CABLES In order to eliminate potential damage to the speakers and other components in the system always turn off the amplifier before unplugging or plugging in the preamplifier s power cord This caution is also applied to plugging in or unplugging the interconnect cables running from the preamplifier to the amplifier When plugging in or unplugging interconnect cables running from source to preamplifier always rotate the preamplifier s volume control to minumum and if available mute the preamplier first POWER LINE MODULATION INTERFERENCE During heavy passages the power needs of the amplifier may fluctuate considerably As these needs are felt at the power source the line voltage available will in tum fluctuate based on the instantaneous power requirement of the amplifier It is an effe
Download Pdf Manuals
Related Search