User Manual - Mastering Mansion
Contents
1. Intelligent circuitry ensures noiseless power on and power off Thermal The output devices of the internal power amplifiers are mounted onto an internal heatsink which heats up and reaches temperatures well above that of ambient The design is such that no forced cooling is necessary provided sufficient free space can be maintained around the cabinet to allow the air to circulate freely The internal circuitry monitors temperature to maintain its safe operating area Should this detect unsafe temperatures output is muted to protect the amplifier You will need to turn the unit off and on to reset the protection This will only work if the amplifiers temperature has fallen within its safe working threshold Front Panel Indicators A multi function LED is mounted behind the LOGO badge on the front of the cabinet On initial turn on the LED will flash green this indicates that the amplifier is warming up see 10 section 1 1 Class A B amplifiers the LED will be continuously green when the amplifier has warmed up and is ready for normal operation The LED will flicker red with music peaks to indicate that the amplifier is 2db under clip The clip indication should be used as a guide that the amplifier is approaching 6 music 5 4 5 5 clip which should be avoided for audible integrity If the amplifier detects a fault or over heats the LED will be continuously red If the amplifier has over heated and the LED has turned red refe2. S8 User Manual Quested Monitoring Systems Ltd Units 6 8 Kingsgate Heathpark Industrial Estate HONITON Devon EX14 1YG England Tel 0 1404 41500 Fax 0 1404 44660 www quested com CONTENTS Introduction 1 1 Class A B Amplifiers Safety Considerations 2 1 General 22 Hearing damage Unpacking Installation 4 1 Positioning 4 2 Grill 4 3 Aligning the speakers 4 4 Wall mounting 4 5 Electrical Connection 4 5 1 Safety Earthing 4 5 2 Voltage Setting 4 5 3 Fuse Setting 4 6 Audio connections Operational Considerations 5 1 Mains On Off Switching 5 2 Thermal 5 3 Front panel indicators 5 4 Signal level 5 5 Contour selectors Technical Specification Line Drawing Guarantee Appendix 9 1 Accessories 9 2 Spares 9 3 Driver replacement ANDANH RA 12 12 13 13 13 10 11 THIS INTRODUCTION Thank you for purchasing this Quested monitor and you can be certain that you have purchased one of the finest monitors in the world 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 it will give you many years of service You will also be assured the best possible performance and long term reliability of your system P
3. S8 is designed to be mounted vertically and will also function if turned on its side However it should be noted that there will be a reduction in its thermal performance of up to 25 if positioned horizontally See section 5 2 Thermal for implications The S8 is tolerant of a variety of mounting positions including stand shelf table or wall mounting Which ever way is chosen the support should be rigid and must not vibrate when the monitor is driven Vibrations will result in lack of low frequency definition The optimum location for the monitors within a room is best determined by experimenting and placing the speaker in a variety of positions The shape of the room normal listening position and room treatment will all have an effect on determining the speakers final positioning It is possible to soffit mount the S8 however it is essential that adequate airflow be provided behind the soffit to ensure the amplifier is adequately cooled 4 2 Grill The S8 has the option of a cloth grill which will offer some protection to the tweeter and bass driver It is not designed to protect the speakers during transit and it is recommended that the original packing should be retained for this purpose Like all types of speaker protection or covering the grill makes a small difference to the HF acoustic performance which for the majority of users will not be noticeable 4 3 Aligning Speakers The speakers should be positioned so that the axi
4. TS IF IN DOUBT ASK The cabinet may safely be suspended upside down from a ceiling or top mounted bracket but the mounting plate should be oriented so that the ball and socket are closer to the REAR of the cabinet IT IS THE RESPONSIBILITY OF THE OWNER TO ENSURE THAT THE BUILDING STRUCTURE AND WALL CEILING FIXTURES ARE STRONG ENOUGH TO SAFELY BEAR THE IMPOSED LOAD The mounting plate holes are sealed by M6 x 16 mm nylon countersunk machine screws These will need to be removed before the cabinet can be screwed onto the mounting bracket THESE NYLON SCREWS SHOULD NOT BE USED TO MOUNT THE CABINET THEY ARE NOT OF SUFFICIENT STRENGTH A STEEL MACHINE SCREW OF AT LEAST 25 mm IN LENGTH SHOULD BE USED FOR THIS PURPOSE If the S8 is subsequently removed from the bracket the mounting holes will need to be re sealed using the nylon screws or some other suitable sealant 4 5 Electrical Connection 4 5 1 4 5 2 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 connected to the electrical installations 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 in put is electronically balanced and does not need the disconnection of any safety earth for the avoi
5. ade 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 IMMEDIATELY AND HAVE THE UNIT PROFESSIONALLY REPAIRED BEFORE ATTEMPTING TO USE IT 4 6 Audio connections The audio signal input is RF filtered and electronically balanced to ensure a high level of rejection 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 balanced two core screened cable is used Source Balanced Pin 2 hot In accordance with international standards 3 pin XLR style input connectors are used with pin 2 being designated the in phase or hot terminal and pin 3 the out of phase or cold terminal Pin 1 is connected to the chassis ground and must be connected to the screen of the audio interconnecting 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 es 2 Hot 1 Ground 3 Cold Source Unbalanced P
6. dance of hum loops Voltage Setting The set voltage is indicated on the rear panel of the unit adjacent to the IEC inlet connector At this setting there is an acceptable tolerance over which the performance of the unit will continue to meet its specifications See power requirements on page 12 of his manual For the 230V setting this is 160V to 255V and for the 115V setting it is 80V to 127V If the unit is connected to voltages in excess of its maximum damage is likely to occur which may not be 4 5 3 your recoverable from without qualified service attention To change the set voltage the amp must be removed from the speaker The power and signal cables must be disconnected before continuing Remove the 6 x M4 socket screws from the left and right hand side edges of the amplifier Carefully remove the back panel and you will see 4 wires and one 3 way cable form connecting to the amplifier with various connectors Note the orientation and position of them all and then disconnect If you look at the amplifier you will see a PCB mounted on the rear of the IEC inlet connector Marked on the PCB you will see the 2 terminals marked with the set voltage see diagram Locate and move the connectors to the other voltage tap noting that the coloured wires correspond with the printing on the PCB Reconnect the wires from the cabinet to the amplifier and replace the amplifier using the 6 bolts You must now change the fuse located in the IEC i
7. e bolts should initially be loosened a little one at a time rather than each bolt being fully removed whilst the other bolts remain fully tightened When replacing the bass driver the gasket behind the driver should be replaced with the new gasket that will be supplied with your new driver Tweeter replacement procedure The tweeter is secured by 4 x M4 machine screws Remove these with a 2 5mm hex drive Take out the tweeter and disconnect the two wires noting which colour goes to which terminal If on removing the 4 screws that hold the tweeter there is any difficulty in removing the unit do not try to force a 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 Remove the 3 pozi screws on the front plate of the tweeter using a number 1 pozi driver b 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 generally the fluid will only need to be added after you have changed the diaphram 2 or 3 times This can be obtained from your dealer distributor or directly from Quested It should be noted that ferrofluid is best added as shown in the diagram below and not from the syringe that it is dispensed in The fluid should never co
8. els in excess of 100 dB 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 internationally agreed limits and different countries have different limits which are measured in differing ways IT IS THEREFORE IMPORTANT THAT USER ESTABLISHES THE RECOMMENDED AND IN SOME TERRITORIES LEGAL LIMITS WHICH ARE IN PLACE As a guide the table below shows the levels that are acceptable in the majority of Western Europe the US and Canada dB A Listening time per day 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 80 dB should be avoided until the next day Unpacking This Quested product has been carefully manufactured tested and packed to ensure that it arrives in a flawless condition The component parts of the packing have been thoughtfully designed to offer sufficient protection during transportation yet remain fully recyclable and should be retained for future use Also included in a separate bag will be the appropriate power cord for your country Installation 4 1 Positioning The
9. in 2 Hot If the equipment providing the audio signal has an unbalanced output then the interconnecting audio cable should be wired so that 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 connection between the ground connection of the unbalanced output and the pin 1 ground connection of the input connector Input gt Hot 1 Ground Source f PN re f 2 Hot _ nw 1 Ground 4 N f ae at 1 Cold Source Unbalanced Phono If the source output is a phono socket then the centre pin of the phono plug should be wired to pin 2 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 5 2 Hot Input N 1 Ground L Source ra ms J f Centre Pin Noa ee AAP e Serr J 7 Fi a P Outer 7 med 3 Cold Casing Cold Source Unbalanced Phono 2 Core cable 2 Hot Input ie 1 Ground L Source wo N Centre Pin f 8 O Casing Cold OPERATIONAL CONSIDERATIONS 5 1 5 2 5 3 Mains On Off Switching and level On Off switching is provided by a rocker switch on the rear panel
10. ion 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 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 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 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 NOTE For certain countries the power cord will be supplied with an integral moulded plug to satisfy national safety standards CAUTION THE REAR PANEL OF THE S8 IS PART OF THE HEAT SINKING ARRANGEMENT THE AND WILL BECOME WARM CAUTION THIS UNIT CONTAIN S MAGNETIC COMPONENTS WHICH CAN AFFECT ADJACENT SENSITIVE EQUIPMENT 2 2 Hearing damage This equipment can deliver sound pressure lev
11. lease read this manual which we have kept as concise as possible it really will help you and covers Important safety considerations The S8 is a self powered 2 way active monitor Its 370 watts of linear class A B amplification make it a powerful choice Typical applications include near to mid field monitoring for recording mixing post production suites broadcast and surround sound The high power output enables the monitors to be used where high monitoring levels are required Although the bandwidth of the S8 is adequate for most situations the low end performance can be further extended by combining it with an SB series sub bass The two products make an ideal combination and extend the frequency response down to 20 Hz 1 1 Class A B amplifiers The S8 use s class A B amplification as with a lot of class A B amplifiers they will only reach there peak sonic performance after a given warm up period We have taken this into consideration when designing the S8 During this warm up period the front mounted LED will flash green When the amplifier has warmed up the LED will stop flashing and stay green The monitor will still function as normal during this period but should not be used for critical listening or referencing Running any signal through the monitor will speed this process up Safety Considerations 2 1 General Before proceeding to connect your Quested monitor to the AC power supply please read the following safety informat
12. nlet socket for the correct one as indicated on the back panel IT IS IMPORTANT THAT YOU NOW MARK THE REAR OF THE UNIT WITH THE NEW SET VOLTAGE Exploded view of small PCB viewed from above showing the voltage selection connectors with alternative pins for the 115V and 230V settings SW2 TX Brown PCB 8 Mains Iss 4 A Beth DANGER Exposed Mains NTL Grey 115v Wolet TX Blue To select En 116v or 230v Grey Ma transfer Grey amp Violet wines 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 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 connector 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 bl
13. or ST and also Quested stands The position of the mounting points are indicated on the line drawing on page 13 of this manual BRACKET MOUNTING OF ANY HEAVY SPEAKER INVOLVES SERIOUS SAFETY ISSUES IT IS IMPORTANT TO FOLLOW THESE GUIDELINES CAREFULLY AND TO READ THE INSTRUCTIONS THAT ACCOMPANY THE MOUNTING HARDWARE When fixing the mounting plate to the loudspeaker The bolt length must always penetrate at least 20 mm into the cabinet base For the recommended Omnimount plate the minimum bolt length is 25 mm Always use locking washers and thread lock compound Always use all of the M6 bolts Because the cabinet is a source of vibration the bolts must be properly tightened but caution must be exercised as over tightening could damage the case Always tighten the bolts a little at a time in order to spread the stress over the area of the mounting plate Ifa torque wrench is available the recommended final torque is 6 Nm 4 lbf feet A 200 mm 8 spanner will achieve the appropriate torque without needing hard work If the Omnimount bracket is being used and the cabinet angled downwards orient the mounting plate so that the ball and socket are closer to the FRONT of the cabinet BE CAREFUL WHEN POINTING THE S8 AT SHARP ANGLES DOWN MORE THAN 30 AS THE CENTRE OF GRAVITY IS MOVED FORWARD CAUSING HIGH BENDING TORQUE AT THE CLAMP PLACING EXCESSIVE LOAD ON THE BALL AND CLAMP OF THE OMNIMOUNT AND THE CABINET FIXING POIN
14. r to section 5 2 Thermal 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 0dB position 0dBu of pink noise will produce 96dB SPL at 1 meter Contour Selectors There are two switch groups that control the HF and LF contour settings These can be used to adjust for room conditions or personal preference The nominal flat position is indicated with a flat line The speaker will only operate correctly if the switches are in one of the positions shown on the rear panel TECHNICAL SPECIFICATION S8 Dimensions 300 w x 428 h x 334 d mm Weight 17 6 kgs Drivers Bass cone 1 x 200 mm 8 High Frequency soft dome 1 x 28 mm 1 1 Maximum SPL 110 dB c continuous pink noise 1 m 122 dB c per pair RMS Frequency Response 50 Hz 20 kHz 2 dB Connector XLR and 4 inch Jack combo socket Impedance 10k Q electronically balanced with RF filters Wiring Pin 1 ground Sleeve Pin 2 hot Tip Pin 3 cold Ring Sensitivity 12 dBu to 6 dBu for 96 dB SPL 1 m set by 10 position rotary switch on rear Subsonic 3dB 20 Hz 24dB oct Ultrasonic 3dB 75kHz 4dB oct Crossover 1k40 LF EQ 2 4 42 Hz 11 HF EQ 2dB 10 kHz POWER AMPLIFIER LF output power gt 220W RMS continuous note 1 HF ou
15. s 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 0 5 and 1 metre behind the engineer s ear position for the following reasons a To obtain the most accurate imaging both front to rear and side to side and also to achieve as large a listening area as possible so that the engineer can move and operate the console without perceiving a change in character of the monitors b To enable listening for long periods of time without suffering strain or fatigue For details of positioning and aligning the speakers for multi channel systems such as 5 1 7 1 etc see the detailed instructions contained in the SB 1 series sub woofer user manual Below is a sketch showing positioning of speakers The S8 is suitable for a wide variety of applications therefore the distance apart may range from less than 1 m to 4 m However the principle of the triangle and the axis of the 2 speakers crossing behind the listening position remains The height and angle of mounting the speaker is equally as important The correct height and angle should result in the axis being at ear level when the engineer is sitting in his normal position at the console 4 4 Wall Mounting Stand Mounting The S8 has built in mounting points that are located on the base of the cabinet and are suitable for Omnimount brackets the S8 uses the 100 series 100 WB or 100 CB
16. ted through its authorised distribution network will effect repair or replacement at its discretion free of charge providing that 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 and tear e The equipment has not been modified in any way f The equipment has not been taken apart or tampered with in anyway 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 13 Grill Omnimount plus fixings Quested S series stands with unique coupling system 9 2 9 3 Spares Description Part Number S8 LS2203 8 8 ohm Bass Driver Q01 0022 TW20 8g shielded soft dome Q03 0040 Fuses T3 15A L01 0010 Fuses T6 3A L01 0018 Driver replacement procedure If it is necessary to replace the bass driver place the cabinet on its rear and using a 4 mm hex head driver remove all of the bolts As with most objects held by a series of bolts thes
17. tput power gt 150W RMS continuous note 1 THD lt 0 025 at levels up to 1 dB below clip 20 Hz 20 kHz typ 0 005 1kHz Hum amp Noise gt 100 dB referred to clip NOTE 1 The continuous rating is for a period not exceeding 5 minutes with unrestricted airflow 100 mm clearance around the amplifier heatsinks and an ambient temperature not exceeding 30 C INDICATORS Amplifier Warming up Front mounted flashing green LED indicates that the amplifier is warming up to reach peak performance Normal operation green LED indicates power applied and normal operation Clip Red LED 2 dB before amplifier clip Fault indication Red constantly on indicates fault POWER REQUIREMENTS Voltage Set by internal plugs nominal 115V or 230V 50 60 Hz AC 230V setting min 160V restricted output power max 255V 115V setting min 80V restricted output power max 127V CONSUMPTION Quiescent 38W Typical use 100W average music Max 160W average music Note 0 dBu 775 mV into open circuit 7 S8 LINE DRAWING 12 Mms Biome Cirt imien rome Erme Zm mo Bh 5g pe y e eamr27 etm 5 hm 28 59 ATMO 8 Guarantee The S8 electronics are guaranteed for 5 years from date of purchase All other parts are guaranteed for 24 months If any part of the product is found to be defective because of faulty manufacture within these periods Ques
18. ver more than 1 2 the coil Ferrofluid 14 Wire with curved loop formed at one end e J h 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 c Re assemble
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