USER MANUAL
Contents
1. 16 93 2 Mid TANJE GVE La aa KGG cine ond Lam dilte dk 17 9 3 3 Bass driver bass driver recone 17 1 Introduction Thank you for purchasing your Quested monitor system and whether it is a pair of passive moni tors or a 4 way active system you can be assured the same care has gone into its design and manufacture You can be certain you have purchased one of the finest monitors in the world and if you take time and care in positioning and aligning the system you will appreciate why Quested monitors have a reputation for faithful reproduction covering the entire audible spectrum They are professional monitors and therefore are not designed to flatter but faithfully reproduce Please take care to maintain the system and you will obtain many years of service Please take the trouble to complete the registration form that came with your monitors This will help us in the future should you raise any queries If you have any questions please address them to your Quested representative who will then refer back to the designer and manufacturer if necessary In this way you will be assured in obtaining the best possible performance and long term reliability of your system This manual covers the VS3208 self powered active monitor Please read this manual which we have kept as concise as possible it really will help you and covers important safety considerations The VS3208 is a self powered three way active monitor with integ2. 5 Cut 10 5 6 Rear Panel Detail VS3208 rear panel showing lower portion only SERIAL No PEPEBERNAN MAINS VOLTAGE 230 POWER ON I ty MAINS IN AC 50 60Hz 350VA FUSE AND VOLTAGE RATINGS 115 85V 130V T10A 230 170V 260V TSA Za LIFT O OFF HF CONTOUR N CUT O n LIFT Z b OFF MF CONTOUR SE HU Ca LIFT o OFF LF CONTOUR T CUT 14 va KON INPUT LEVEL ANA dBu for 100dB SPL CAUTION RISK OF ELECTRIC SHOCK INPUT REMOVE POWER BEFORE OPENING H 2 HOT 3 COLD CAUTION 1 GROUND ELEVATED TEMPERATURE 10k Ohm ELECTRONICALLY BALANCED USE THIS WAY UP ALLOW ADEQUATE VENTILATION HEATSINKS MAY BE HOT TO TOUCH 60 C CAUTION MAGNETIC INTERFERENCE THIS EQUIPMENT CONTAINS MAGNETIC COMPONENTS WHICH MAY AFFECT SUSCEPTIBLE EQUIPMENT O l CE Designed 4 Manufactured by QUESTED MONITORING SYSTEMS Ltd UK Update 5 01 Page 12 VS3208 user manual 6 Technical Specification Size w x h xd Weight Drivers Maximum SPL Frequency Response INPUT Connector Impedance Wiring Sensitivity Minimum sensitivity Maximum sensitivity FILTERS Subsonic Ultrasonic Crossover User LF EQ User MF EQ User HF EQ POWER AMPLIFIER LF output power Mid Output HF output power THD Hum
3. Noise 485 x 612 x 415mm 19 x 241 4 x 161 2 47kgs 104lbs Bass cone 2 x 200mm 8 Mid 1 x 75mm 3 soft dome High Frequency soft dome 1 x 28mm 1 1 8 112dB C 40Hz 18kHz 2dB XLR3 type Female 10kQ Electronically balanced with RF filters Pin 1 ground Pin 2 hot Pin 3 cold Rear mounted 10 position rotary switch calibrated in 2dB steps 4dBu for 100dB SPL 1m Max input level for clip gt 16dBu 5kHz 14dBu for 100 dB SPL 1m Max input level for clip gt 2dBu 5kHz 3dB 16Hz 12dB oct LF equaliser out 3dB 250kHz 6dB oct HF equaliser out 1 25kHz 24dB oct 3 position rear mounted switch to select FLAT for normal use CUT for nom 2dB cut below 100Hz and for use with external sub and lift for nom 2dB LF lift below 80Hz 3 position rear mounted switch to select FLAT for normal use CUT for nom 2dB cut and lift for nom 2dB LF lift in the frequency band 500 3kHz 3 position rear mounted switch to select FLAT for normal use CUT for nom 2dB cut and lift for nom 2dB LF lift above 5kHz gt 230W rms continuous note 1 gt 110W rms continuous note 1 gt 100W rms continuous note 1 lt 0 03 at levels up to 1dB below clip 20Hz 20kHz typ 0 005 20W rms 1kHz gt 100dB referred to clip note 1 The continuous rating is for a period not exceeding 5 minutes with unrestricted airflow 100mm clearance around the amplifier heatsinks and ambient temperatures is lt 30 C INDICA
4. a fault develops the unit will need to be replaced Remove the 4 self tapping wood screws using a posidrive no 2 screwdriver Take out the unit and disconnect the two wires noting which colour goes to which terminal If on removing the 4 screws that hold the mid range there is any difficulty in removing the unit do not try to force a blade between the cabinet and mid range but use a small narrow bladed screwdriver in one of the screw holes to gently lever out the unit Connect the new mid range and re assemble into the cabinet Do not overtighten the 4 screws 9 3 3 Bass driver and bass driver recone The bass drivers are held in by four M5 machine screws Remove the screws in the order shown below using a 4mm hex driver The drivers are heavy so hold the driver by the frame when removing the last screw Remove the bass driver using a screwdriver in one of the screw holes to gently lever out the driver if there is any difficulty in removing the unit Do not force a blade between the cabinet and driver Disconnect the two wires noting which colour goes to which terminal Replace with the new driver and re assemble in the reverse order A recone unit is available for the VS3208 bass driver Instruction for reconing is included with the recone kit However unless you are familiar with the practice of recon ing it is better to have the speaker 3 reconed by someone who is experi enced VS3208 user manual Page 17 Update 5 01
5. DONA da USER MANUAL QUESTED MONITORING SYSTEMS Table of Contents 1 INTRODUCTION gn kaa PAGKA RAMA KAG RA 3 2 SAFETY CONSIDERATIONS 0 000 anan 4 2 1 C1 AA NAA AA AA 4 2 2 Hearing Damage 4 3 UNPACKING 656634 ak RA MA eee G RR MANGA HA 5 4 INSTALLATION pa 60405 wie 064 na do 5 4 1 Electrical Connections 5 4 1 1 Safety ETNO ve dh e cass 5 4 1 2 Fuse Settings qd KAKAAG KAR ERE HAAN 5 4 1 3 Voltage Selection oie ee een eee ena ena es 6 4 2 Positioning bores Kae Fee WEE ede Po oa dw 7 4 3 Aligning Speakers AA 7 4 4 Audio Connections 9 5 OPERATIONAL CONSIDERATIONS II 5 1 Mains On Off Switching aaa aa ann 11 5 2 INGUIN cee eh dete wad KB Ee ead owes 1 5 3 SON LEVEL mid ose ene KG AURA sak ae ee KG Ka a 11 5 4 Front Panel Indicator 11 5 5 Contour Selections 11 5 6 Frequency F D e NAK WAR SNANG KAG YR RR LAN 12 5 6 Rear Panel Detail 12 6 TECHNICAL SPECIFICATION aaa aaa 13 7 LINE DRAWING acisovavesins i tii kd do rier eas 14 8 GUARANTEE pa 669665 GRE WAG osika viteve 15 9 APPENDIX i KAMA NG CA CA OEE sR KA 15 9 1 AGCESSONGS ig enc inoi kien rani AEE rE i 15 9 2 SPOTS iai ca PABABA E E AE E EEA NN 15 9 3 Driver Replacement Procedure 16 9 3 1 Tweeter and tweeter diaphragm
6. HE TOUCH CAUTION THIS UNIT CONTAINS MAGNETIC COMPONENTS WHICH MAY EFFECT ADJACENT SUSCEP TIBLE EQUIPMENT 2 2 Hearing damage This equipment can deliver sound pressure levels in excess of 112dB At this level permanent hearing damage can occur and exposure to this level of sound even for relatively short periods see table below can be harmful Of equal importance to the maximum level of sound is the exposure to high levels of sound for extended periods There are no international agreed limits and different countries have different limits measured in differing ways IT IS THEREFORE IMPOR TANT THAT THE USER ESTABLISHES THE RECOMMENDED AND IN SOME TERRITORIES LEGAL LIMITS THAT ARE IN PLACE Update 5 01 Page 4 VS3208 user manual As a guide the table below shows the levels that are acceptable in the majority of Western Europe and the US amp Canada dB A Listening time per day 90 8 hours 95 2 4 hours 100 40 minutes 105 15 minutes 110 5 minutes 115 and over Not at all It is also important to note that the effect of exposure to sound is cumulative Having listened to sound for example for 15 minutes at 105 dB then further exposure to noise levels above 80dB should be avoided until the next day 3 Unpacking This Quested product has been carefully manufactured tested and packed to ensure it arrives in a flavvless condition The component parts of the packing have been thoughtfully designed to offer sufficient protecti
7. TION Power on Overload Thermal protection POWER REQUIREMENTS Voltage CONSUMPTION Front mounted LED green indicates power applied Front mounted LED flashes red 0 5dB below signal clip Front mounted LED turns red signal is muted and amplifier switches to standby mode during thermal protection cooling cycle Normal operation resumes when heatsink temperature drops by 20 C Set by internal plugs nominal 115V or 230V 50 60Hz AC 230V setting Min 160V restricted output power Max 263V 115V setting Min 80V restricted output power Max 132V Quiescent 105W Typical use 280W Max 950W Note OdBu 775mV into open circuit This product is built to conform to the requirements for CE marking VS3208 user manual Page 13 Update 5 01 7 Line Drawing 415mm e 485mm 16172 19 Acoustic Centre Update 5701 Page 14 VS3208 user manual 8 Guarantee The VS3208 is guaranteed for 24 months from its date of purchase If any part of the product is found defective due to faulty manufacture within 24 months from the date of purchase Quested through its authorised distribution network will effect repair or replacement at its discretion free of charge providing a The fault is reported to the authorised distributor b Proof of purchase is provided c The fault is not caused by misuse neglect or faulty operation by the user d The fault is not a result of fair wear amp tear e The equipment has no
8. and the audio signal will be muted 5 5 Contour Selectors Three rear panel switches allow the low mid and high frequency response to be trimmed to adjust for room conditions or personal preference The 3 position HF CONTOUR switch should be set to OFF for a nominally flat HF response The LIFT and CUT positions will respectively increase or reduce the gain above 5kHz by a nominal 2dB The 3 position MF CONTOUR switch should be set to OFF for a nominally flat mid response The LIFT and CUT positions will respectively increase or reduce the gain between 500Hz and 3kHz by a nominal 2dB The 3 position LF CONTOUR switch should be set to OFF for a nominally flat low frequency response The CUT position should be selected if an external sub is employed and reduces the response below 100Hz by up to 2dB while the LIFT position increase the response above 80Hz by a nomi nal 2dB The effects of the contour switches are shown on the frequency plot opposite The effect of the contour selection is best seen on the frequency plot The lift and cut has a gradual effect over the frequency stated and can only be quoted as a nominal value VS3208 user manual Page 11 Update 5 01 5 5 Frequency Plot 50 100 200 500 1k 2k 5k 10k 20k 5 10 50 100 200 500 1k 2k 5k 10k 20k
9. blade between the cabinet and tweeter but use a small narrow bladed screwdriver in one of the screw holes to gently lever out the tweeter If it is necessary to replace the diaphragm a b C Remove the 3 machine screws on the front plate of the tweeter using a 2mm hex driver De solder and unwind wires from the terminal tags Remove diaphragm assembly and replace with the new diaphragm The Ferrofluid has the appearance of oil and is dark brown in colour and should cover about 1 3 of the coil If there is less than this then additional Ferrofluid should be added This can be obtained from your dealer distributor or directly from Quested The ferrofluid reference is It should be noted that ferrofluid is best added as shown in the diagram below The fluid should never cover more than 1 2 the coil Wrap the wires from the diaphragm around the corresponding tags Keep the wire slightly taught but do not strain Re solder the wires and re assemble Wire with curved loop formed at one end Ferrofluid Tweeter Dip wire in ferrofluid a small amount will be retained on the wire hold wire over the tweeter gap and the magnet will attract the fluid from the wire into the gap Do this 3 or 4 times in different position on the tweeter then check by inserting the new diaphragm to see the amount of fluid in the tweeter Update 5 01 Page 16 VS3208 user manual 9 3 2 Mid range driver No recone kit is available for the mid range so if
10. eneral Before proceeding to connect your Quested Monitor to the AC power supply please read the fol lowing safety information CAUTION RISK OF ELECTRIC SHOCK REMOVE POWER BEFORE OPENING CAUTION RISK OF ELECTRICAL SHOCK REFER SERVICING TO QUALIFIED PERSONNEL THE POWER CORD MUST ALWAYS BE REMOVED BEFORE THE AMPLIFIER IS DISMANTLED WARNING TO REDUCE THE RISK OF FIRE OR ELECTRICAL SHOCK DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE WARNING THIS APPLIANCE MUST BE EARTHED The cores in the supplied mains lead are colour coded in accordance with the following code GREEN AND YELLOW EARTH BLUE NEUTRAL BROWN LIVE As the colours of these wires may not correspond with the coloured markings identifying the ter minals 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 and yellow The wire which is coloured blue must be connected to the terminal in the plug which is marked with the letter N or coloured black The wire which is coloured brown must be connected to the terminal in the plug which is marked with the letter L or coloured red Notice For certain countries the power cord will be supplied with an integral moulded plug to satisfy national safety standards CAUTION THE HEATSINKS OF THIS UNIT CAN REACH ELEVATED TEMPERATURES WHICH MAY FEEL HOT TO T
11. experimenting and placing the speaker in differing positions The shape of the room normal listening position and room treatment will all have an effect on determining the speakers positioning Placing the cabinet against a wall will reinforce the bass performance of the speaker and up to an additional 3dB may be obtained Placing the monitors in a corner will further reinforce the bass performance and gains of up to 6dB may be achieved but be very careful about sitting the monitors in a room corner because it can excite standing waves and create an unpleasant boomi ness IF THE OPTION OF SOFFIT MOUNTING IS CHOSEN IT IS ESSENTIAL THAT ADEQUATE AIRFLOW IS PROVIDED BEHIND THE SOFFIT TO ENSURE THE AMPLIFIER IS ADEQUATELY COOLED OR THE OPTIONAL REMOTE MOUNTING KIT IS PURCHASED TO ENABLE THE ELECTRONICS TO BE REMOVED FROM THE REAR OF THE SPEAKER AND MOUNTED OUTSIDE THE SOFFIT 4 3 Aligning speakers The speakers should be positioned so that the axis an imaginary line drawn from the acoustic centre of the left and right monitor see line drawing on page 13 of this manual should cross between 1 2 and 1 meter behind the engineers position for the following reasons a To obtain the most accurate imaging both front to rear and side to side and to obtain as large as possible listening area so that the engineer can move and operate the console without perceiv ing a change in character of the monitors b To enable listening for long periods of ti
12. me without suffering strain or fatigue VS3208 user manual Page 7 Update 5 01 IA The height of mounting the speaker is equally as important The correct height should result in the axis being at ear level when the engineer is sitting in his normal position at the console Update 5 01 Page 8 VS3208 user manual 4 4 Audio connections The audio signal input is RFI filtered and electronically balanced to ensure a high level of rejec tion for common mode interference signals and to give a professional connection to external equipment It is essential for optimal use of these specifications that a professional grade bal anced two core screened cable is used Source Balanced Pin 2 hot In accordance with international standards 3 pin XLR style input connectors are utilised with pin 2 being designated the in phase or hot terminal and pin 3 the out of phase or cold ter minal Pin 1 is connected to the chassis ground and must be connected to the screen of the audio inter connecting cable This is necessary to ensure proper compliance with European Standards for Electromagnetic Compatibility Pin 1 carries no signal voltages or currents and is provided purely for screening purposes It should not be connected to either pin 2 or pin 3 2 Hot Input 1 Ground Source s 2 Hot 1 Ground Source Unbalanced Pin 2 Hot If the equipment providing the audio signal has an unbalanced outpu
13. on during transportation yet remain fully recyclable and should be retained for future use Also included in a separate bag vvill be the appropriate povver cord for your country 4 Installation 4 1 Electrical connections 4 1 1 Safety Earthing This product has been designed to comply with international safety standards It is essential that the green yellow core of the mains cable or the ground pin of a 3 pin moulded plug is con nected to the electrical installation safety earth or ground It is internally connected to all exposed metal surfaces and it is essential for personal safety as well as proper operation of the product The audio signal input is electronically balanced and does not need the disconnection of any safety earth for the avoidance of hum loops 4 1 2 Fuse Setting It is very unlikely the fuse will fail during normal use but should this occur the situation must be approached with some caution Check that the mains voltage setting is correct for your installation supply and that the original fuse was the correct rating see 9 2 Spares The fuse may blow if the unit is subjected to mains power surges or spikes or if the mains wiring has any poor or faulty connections in which case a qualified electrician should be consulted Very occasionally a fuse can become degraded after many years of service and simply replacing it with a new one will restore the system The fuse is housed in a unit integral with the IEC inlet connec
14. ral electronics that provides in excess of 400W rms When the VS3208 is used as a stereo pair they are suitable for main moni tors in smaller control rooms or as mid field reference monitors in larger control rooms However in LCR or full surround systems the VS3208 are suitable as main monitors in medium to large rooms either in an all VS3208 arrangement or in conjunction with VS2205 s or VS2108 5 and the VS1115 sub woofer The optional remote mounting kit allows the electronics to be removed and mounted away from the speakers enabling the VS3208 to be mounted in soffits where cooling cannot be provided Typical applications include broadcast post production project studios mobile recording and audio visual as well as for general installations in non studio applications The compact size allows for ease of placement of three or more units for LCR and multi channel applications and the width of 19 485mm enables the VS3208 to be mounted in the space that is frequently available above rack mounted equipment Although the bandwidth of the VS3208 is more than adequate for most situations the low end performance can be further extended by combining it with the VS1115 sub bass The two prod ucts make an ideal combination and extend the frequency response down to 20Hz The VS1115 is also ideal when a discrete sub bass channel is required when using formats such as Dolby 5 1 VS3208 user manual Page 3 Update 5 01 2 Safety Considerations 2 1 G
15. t then the interconnecting audio cable should be vvired so the hot output of the source is connected to pin 2 of speaker input XLR and the ground of the source connected to pin 3 The screen of the interconnecting audio cable should be connected to pin 1 of the input connector only There must be no con nection between the ground connection of the unbalanced output and the pin 1 ground con nection of the input connector Input 2 Hot 1 Ground Source 2 Hot VS3208 user manual Page 9 Update 5 01 Source Unbalanced Phono If the source output is a phono socket then the centre pin of the phono plug should be wired to pin2 of the speaker input XLR and the outer phono casing to pin 3 The wire from pin 1 of the XLR will not be connected to the terminals of the phono plug strict adherence to this will help to eliminate ground loop hums and RF break through Source Centre Pin Hot Outer Casing 3 Cold Cold Source Unbalanced Phono 2 Core cable Input 2 Hot 1 Ground Source Centre Pin Hot A Outer Casing 3 Cold Cold Update 5 01 Page 10 VS3208 user manual 5 OPERATIONAL CONSIDERATIONS 5 1 Mains On Off Switching On off switching is provided by a rocker switch on the left hand side of the rear panel adjacent to the IEC power connector Intelligent circuitry ensures noiseless power on and power off modes 5 2 Thermal The internal power amplifiers have their output devices mounted onto
16. t been modified in any way f The equipment has not been taken apart or tampered with in any way other than described in the service manual for the adjustment and replacement of user accessible items The guarantee does not cover a Damage during transit b Damage to diaphragms cones and other speaker parts as a result of the over driving of the monitors or by faulty installation or connection c Damage caused by incorrect installation or during installation caused by incorrect handling d The cost of carriage to or from the authorised repairer 9 Appendix 9 1 Accessories Accessory Magnetic shielding Shielded Tweeter Shielded Bass Driver Remote Mounting Kit 9 2 Spares Spare part Description 152207 200mm 8 Loudspeaker TW30 28mm 1 1 8 soft dome MD75 75mm 3 mid range softdome RD30 28mm 11 8 soft dome diaphragm 230v fuse 20mm T5 amp 115v fuse 20mm T10 amp VS3208 user manual Page 15 Part Number Q03 0011 Q01 0026 R20 0012 Part Number Q01 0025 Q03 0010 Q02 0040 Q53 0010 LO1 0024 LO1 0026 Update 5 01 9 3 Driver replacement procedures 9 3 1 Tweeter and tweeter diaphragm The tweeter is secured by 3 self tapping wood screws Remove these with a posidrive no 2 screwdriver Take out the tweeter and disconnect the two wires noting which colour goes to which terminal If on removing the 3 screws that hold the tweeter there is any difficulty in remov ing the unit do not try to force a
17. the blue finned heatsinks which causes them to heat up and reach temperatures well above that of ambient The design is such that no forced cooling is necessary provided a sufficient free space can be maintained around the heatsinks to allow air to circulate freely The internal monitoring circuitry includes temperature sensing as part of its safe operating area Should this detect unsafe temperatures the amplifier will automatically shut off and the front panel led indicator will show a red colour Once temperatures have reached a safe operational level the amplifier will automatically switch on again 5 3 Signal Level Input sensitivity can be adjusted with the ten position rotary switch recessed in the rear panel by using a flat bladed screwdriver The control has an 18dB range in 2dB steps and accurately sets the SPL level for a known input signal level With the switch set at the OdB position OdBu of pink noise will produce 100dB SPL at 1 meter 5 4 Front Panel Indicator A two colour led indicator is provided that illuminates through the logo badge on the cabinet front When mains power is applied the indicator will show as green indicating correct opera tion When the power amplifiers are close to their maximum output power the indicator will show as red for the period of time that the input signal level is excessive Should there be internal electronic faults or overheating of the heatsinks the indicator will show permanent red
18. tor see rear panel drawing page of this manual To gain access to the fuse remove the power cord and unclip the fuse carrier using a flat blade A spare fuse of the correct rating is also provided within the same carrier If none of the above is the cause of the fault it is likely that the unit has suffered an internal component failure and will need returning to a qualified agent for servicing IF THE REPLACEMENT FUSE SHOULD FAIL DISCONNECT FROM THE MAINS IMMEDI ATELY AND HAVE THE UNIT PROFESSIONALLY REPAIRED BEFORE ATTEMPTING TO USE IT VS3208 user manual Page 5 Update 5 01 4 1 3 Voltage Setting The mains voltage for which the unit is configured is shown on the orange label above the IEC inlet connector For the 230vAC setting the unit will perform to full specification over the range 230v to 263v and will perform to full spec except for a progressive reduction in power down to 179v Likewise for the 115vAC setting the unit will perform to full specification over the range 115v to 131v and will perform to full spec except for a progressive reduction in power down to 90v At normal listening levels the reduction in available power will not be noticed Simplified view of rear of VS3208 with rear panel removed showing right hand side rama a If for any reason it is necessary to change r zh the voltage setting the mains lead must be i removed and the back panel taken off using a 2 5mm hex driver to remove the seven counters
19. unk socket screws 3 on each side and the seventh adjacent to the XLR connector Gently pull away the rear panel to reveal the cable that is preventing the rear panel from being removed Disconnect the cable that is running from the IEC inlet connector to the main PCB The rear panel can then be removed The connector plugs can then be removed from its existing position and placed on the adjacent pins as indicated in this illustration It is essential to switch the settings on both boards so that both connectors are either plugged into the 230 volt or 115 volt pins Alternative Settings gt oon DALIT U Pi N o o lt Toh 0 n Cable to IEC Tad connector Update 5 01 Page 6 VS3208 user manual 4 2 Positioning The VS3208 is designed to be mounted vertically and should not be turned on its side Not only would this result in a degradation of the speakers acoustic performance but could result in the overheating of the amplifier as the heat sink is designed for effective cooling when the cabinet is mounted vertically The VS3208 can either be soffit mounted or positioned on speaker stands but which ever way is x chosen the support should be rigid and must not vibrate when the monitor is driven Vibrations will result in lack of low frequency definition Its positioning close to or away from the rear wall and proximity to any room corners is best determined by
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