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Link electronic DigiFlex 1151 Stereo Amplifier User Manual

1. 328A Reference Monitor English Francais Deutsch AA Operating Guide Important safety information Explanation of symbols used in this manual and on the product This symbol is intended to alert the user to the presence within the enclosure of uninsulated dangerous voltages of sufficient magnitude to cause electric shock This symbol is intended to alert the user to the presence of important maintenance and servicing information in the instruction and service manuals WARNING TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE GENERAL SAFETY INSTRUCTIONS 1 Read instructions Read the safety and operating instructions before operating the appliance 2 Retain instructions Retain the safety and operating instructions for future reference Heed warnings Observe all warnings on the appliance and in the operating instructions Follow instructions Follow all operating and use instructions Water and moisture Do not use the appliance 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 Use only with a cart or stand that is recommended by the manufacturer 6a An appliance and cart combination should be used with care Quick stops excessive force and uneven surfaces may cause the appliance and cart combination to overturn 7 Wall or ceiling mounting Mount t
2. 45 kg weight of the monitor To help ensure safe operation it is important to consider stability when mounting the monitor on a stand There are two methods of stand mounting a 328A a Placing directly on the stand platform normally rubber covered The illustration below shows the location of the centre of gravity C of G of the monitor to help you position the 328A safely The C of G should fall as close to the centre of the platform as possible b Fixing the four rubber adhesive backed feet to the base of the monitor and placing it on the stand platform The feet should be positioned surrounding the C of G and as far from it as the platform size allows See the illustration below for a suggested placement Positioning the feet relative to the C of G CONNECTING THE AUDIO INPUT The 328A s combined XLR 1 4 3 pole input connector is wired to the balanced amplifier input as shown in the table below XLR input Pin 2 Tip Pin 3 Jack input Signal Signal Ring Ground Pin 1 Screen If the source itself has a balanced output use twin conductor shielded cable microphone cable connecting Pin 2 Tip to Pin 2 Tip Pin 3 Ring to Pin 3 Ring and Pin 1 Screen to Pin 1 Screen using the shield If the source has an unbalanced output use single conductor shielded cable with Pin 2 Tip of the input connected to the hot signal pin of the source and Pins 3 Ri
3. Bass Roll on equalisation features sufficient power to the drivers to achieve the rated maximum acoustic output The power supply high voltage rails track the average output for maximum efficiency and minimum heat generation CABINET DESIGN The closed cabinet design is low profile flat fronted with curved sides Carrying handles on the sides make for easy handling The back panel comprises two large aluminium heatsinks for the power amplifiers with a central plate carrying the controls and connectors Ventilation slots for the amplifiers and power supplies run across the top of the cabinet at the rear The sides and top of the cabinet are formed from painted Hornflex an MDF based material This innovative material makes possible the curved surfaces of the 328A that greatly reduce internal standing wave patterns and hence practically eliminate colouration Four adhesive backed rubber feet are supplied for positioning on the base of the unit as required English 2 Features MAINS POWER INLET FUSE DRAWER A combined mains power inlet with integrated fuse drawer is situated on the rear panel POWER ON INDICATOR A blue LED on the front panel indicates when the unit is operating The LED will flash for 30 seconds when power is turned on During this time the servo circuitry is stabilising and no audio will be issued from the bass drivers OVERLOAD PROTECTION Voltage clamps on the balanced amplifier input protect the 328A
4. dust and fingerprints with a soft dry cloth Avoid using domestic cleaning products on the unit Technical Specification Free field 24 Hz 33 kHz Speaker Sensitivity 92 dBA E 1m ref O dBu frequency response 3 dB points Treble Shelf 1 5 dB above 10 kHz Maximum short term Flat output 1m on axis 114 dB SPL 1 5 dB above 10 kHz Bass Roll on 12 dB octave below On Off Rocker switch Input impedance 6 kQ balanced on rear panel Input sensitivity 4 dBu or 10 dBV switchable Physical Crossover frequencies Drive units LF to MF 455 Hz LE Two 8 servo controlled MF to HF 3 50 kHz aluminium alloy cone diaphragm HF to SHF 12 10 kHz Midrange 75 mm dome Crossover slope 24 dB octave Tweeter 25 mm dome Linkwitz Reilly Super tweeter 13 mm dome Power amplifiers Cabinet construction Flat front and curved sides with a carrying handle on Bass 2 X 500 W each side 3 K driver array MF 250 W Input connector Combined XLR HF 125 W 1 4 3 pole jack SHF 125 W Power On indicator Blue LED on front panel Standby Time Delay Type S506 10A Typical 115 W Dimensions Width 675 mm 26 Depth 570 mm 22 Shipping Height 400 mm 16 Width 840 mm 33 Depth 685 mm 27 Weight Actual Shipping English LINN Part 848
5. ensure the fuse cover is fitted If the fuse cover is missing do not use the plug Contact Linn to obtain a replacement fuse cover Fuses are for fire protection and do not protect against electric shock Mains plug replacement Should your mains plug need replacing and you are competent to do this proceed as follows If you are in doubt contact your Linn retailer or a competent electrician Disconnect the plug from the mains supply Cut off the plug and dispose of it safely A plug with bared conductors is dangerous if engaged in a live socket Only fit a 10 Amp BS1363A approved plug with a 10 Amp fuse The cable wire colours or a letter will be marked at the connection points of most quality plugs Attach the wires securely to their respective points The Brown wire must go to the Live pin the Blue wire must go to the Neutral pin and the Green Yellow wire must go to the Earth pin Before replacing the plug top ensure that the cable restraint is holding the outer sheath of the cable firmly and that the wires are correctly connected a b 22 2 WARNING THIS APPLIANCE MUST BE EARTHED CE Declaration of Conformity Linn Products Ltd declare that this product is in conformance with the Low Voltage Directive 73 23 EEC and Electromagnetic Compatibility 89 336 EEC as amended by 92 31 EEC and 93 68 EEC The conformity of the designated product with the provisions of Directive number 73 23 EEC LVD is proved by full compliance with the fo
6. from accidental overdrive or spikes while allowing excellent working headroom The amplifiers and power supplies are individually protected from overload If a protection circuit operates the associated driver will cease operation until the circuit automatically resets Thermal and current protection is used on the power supplies while the amplifiers incorporate thermal overload protection CONTROLS The user controls described below are mounted on the rear panel of the 328A Balanced Audio In Accepts the output from an audio signal source via an XLR connector or 1 4 jack The signal can be balanced or unbalanced see Connecting the Audio Input BALANCED AUDIO IN SPEAKER SENSITIVITY er TREBLE SHELF u 0dB ni BASS ROLL ON 19Hz 50Hz 100Hz Speaker Sensitivity Switches the input sensitivity of the 328A monitor to either 4 dBu or 10 dBV as required Treble Shelf Provides a 1 5 dB boost or cut POWER OFF ON adjustment to the HF response of the 328A if required Bass Roll on Applies a 12 dB octave roll on at three preset frequencies to the LF response of the 328A if required VOLTAGE RANGE I 100 120V 50 60Hz I 220 240V 50 60Hz REPLACE WITH FUSE BUSSMAN S506 10A 250V POWER CONSUMPTION 3kW Installation and Operation MOUNTING RECOMMENDATIONS The most suitable position to mount the monitor is on a stand behind the mixing console Any stand used must be able to carry the
7. gh power low colouration low resonance low distortion and exceptionally good low frequency response for the size of enclosure HIGH SOUND PRESSURE LEVEL WARNING Linn monitors are capable of generating high sound pressure levels SPL Your hearing can be damaged by exposure to high SPL for an extended period of time Therefore we recommend that you use an integrating type sound level meter to measure your exposure to SPL while using these monitors and that you limit your exposure to within that recommended by your national health authority It is not sufficient to rely on your own judgement concerning SPL when working with high quality monitors because your perception of SPL is dependent on the amount of distortion introduced by them Because this distortion is very low in the Linn 328A you can be led into believing the SPL is lower than it actually is and hence risk exposure to damaging levels CELLPHONE WARNING Cellular telephones should not be placed in close proximity to this monitor due to the possibility of damage to the monitor the cellphone or both caused by electromagnetic interaction APPLICATIONS The 328A is suitable for the most exacting high resolution audio monitoring applications The unit s compactness and low profile silhouette give excellent working visibility making it an ideal reference tool for professional music broadcast post production and mastering applications UNPACKING Your 328A Reference Monito
8. ighten the retaining screws no more than is necessary to hold the driver firmly in position 3 K DRIVER ARRAY REMOVAL AND REPLACEMENT The 3 K driver array can be removed by unscrewing the seven M4 retaining screws and carefully withdrawing the unit directly away from the baffle until the built in connector at the back of the unit disengages Replacement is a reversal of the above procedure taking care to tighten the retaining screws no more than is necessary to hold the driver array firmly in position set torque driver to 200 cNm if used FUSE REPLACEMENT The fuse is a time delay type Always replace with a fuse of this type and rating see the Technical Specification section If the fuse repeatedly blows within a short time of being replaced please contact Linn for advice ORDERING SPARES Service kits to replace the LF drivers and the 3 K driver array and the amplifier module are available if required These service kits are user installable and can be ordered from Linn using the following codes Servo base Driver 328A SDR 328A S3K 3 K Driver Array Servo base Driver and 3 K Driver Array 328A SPRS You can place an order with Linn via orders linn co uk Or if you need more information on pack contents pricing etc you can contact the Linn Helpdesk via helpline linn co uk or by telephone on 44 0 141 307 7777 CLEANING Disconnect the 328A from the power supply before cleaning Remove
9. llowing standards Standard number Date of issue Test type EN60065 1998 General requirements Marking Hazardous radiation Heating under normal conditions Shock hazards under normal operating conditions Insulation requirements Fault conditions Mechanical strength Parts connected to the mains supply Components Terminal devices External flexible cords Electrical connections and mechanical fixings Protection against electric shock Stability and mechanical hazards Resistance to fire The conformity of the designated product with the provisions of Directive number 89 336 EEC EMC is proved by full compliance with the following standards Standard number Date of issue Test type EN55013 2001 Conducted emissions EN55013 2001 Absorbed emissions EN55020 2002 Immunity FCC Notice NOTE This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning
10. ng and Pin 1 Screen linked together and connected to the source signal ground English English Quick and easy maintenance was foremost in the design brief for this monitor and therefore the drivers use modular mounting arrangements so that they can be replaced without the need for special tools or specialist personnel The replacement procedures are outlined below but fuller versions including explanatory graphics can be supplied on request LF DRIVER REMOVAL AND REPLACEMENT An LF driver can be removed by an experienced technician following the procedure below This is most easily carried out with the front of the monitor facing upwards 1 Carefully remove the rubber trim ring covering the rim of the grille taking care not to damage the front panel 2 Unscrew and withdraw the eight M5 retaining screws using a No 25 Torx driver bit 3 Carefully remove the grille 4 Withdraw the driver unit until the two cable connectors are exposed 5 Cut all cable ties securing wires to the driver chassis taking care not to damage any of the wires 6 Unsolder the cables from the driver terminals taking careful note of how the connections are made 7 Disconnect the 3 way JST connector to free the unit Replacement is a reversal of the above procedure taking care to remake the driver connections correctly Damage to the driver may result when the unit is A switched on if these connections are remade incorrectly T
11. o a wall or ceiling only as recommended by the manufacturer 8 Ventilation Site the appliance 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 the 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 Site the appliance away from heat sources such as radiators heaters stoves or other appliances including amplifiers that produce heat 10 Power sources Connect the appliance to a power supply only of the type described in the operating instructions or marked on the appliance 11 Grounding or polarisation Do not defeat the safety purpose of the polarised or grounding type plug A polarised plug has two blades with one wider than the other A grounding type plug has two blades and a third grounding prong The wide blade or the third prong are provided for your safety When the provided plug does not fit into your outlet consult an electrician for replacement of the obsolete outlet 12 Power cord protection Route power cords 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 power sockets and at the point where they exit from the appliance 13 Protective attachment plug As a safety feature the product is equi
12. pped with an attachment plug containing overload protection See the instruction manual about resetting or replacing the plug Should the plug need replacing ensure that a replacement is used which has the same overload protection as the original 14 Cleaning The product should be cleaned only as recommended by the manufacturer 15 Power lines An outdoor antenna should be located away from power lines 16 Outdoor antenna grounding If an outdoor antenna is connected to the uner receiver ensure that the antenna system is grounded to provide some protection against voltage surges and static build up In the USA see article 810 of the National Electrical Code ANSI NFPA 70 concerning installation requirements 17 Lightning storms Unplug this apparatus during lightning storms or when unused for long periods of time 18 Objects and liquid entry Do not let objects or liquids fall into the product Do not expose the product to dripping or splashing Do not place a vessel containing liquid on top of the product 19 Damage requiring service The product should be serviced by qualified personnel if a The power cord or plug has been damaged b Objects or liquid have fallen into the product c The product has been exposed to rain d The product does not appear to operate normally or exhibits a marked change in operation e The product has been dropped or the enclosure damaged 20 Servicing Don t attempt to service the produc
13. r comes packed in a box with the following accessories e one mains lead e this manual The 328A monitor is heavy 45 kg and must therefore be handled using appropriate precautions to avoid the possibility of personal injury It should always be lifted and handled by two people while unpacking or repacking and during subsequent positioning operations We recommend you retain the packaging for reuse in case you need to transport the unit at any time INSPECTION Your 328A left the factory in perfect condition but it is possible damage may have occurred in transit After unpacking your monitor and before connecting to mains power or other equipment inspect the monitor for such damage If damage is found immediately contact the carrier for advice on their claims procedure VOLTAGE SELECTION Voltage selection is not needed Your 328A is factory set to operate from your local mains supply The mains lead supplied may be fitted with a fused plug according to local regulations If this is the case always replace this fuse with another of the same type and rating The 328A Reference Monitor must always be earthed when connected to mains power Use the earthed moulded mains lead supplied Never use an unearthed plug or adapter with this unit English Technical Overview TWIN LF DRIVERS GRAPHS Two identical 8 8Q aluminium alloy diaphragm LF drivers deliver a 3 dB point of 20 Hz with a usable response a down to 15 Hz a
14. t 6 dB These units are user replaceable 80 CLOSED LOOP LF CONTROL 70 To obtain the ultimate in low frequency response for the 60 cabinet size closed loop feedback is used to control the 50 LF drivers This system uses an accelerometer mounted on 20 30 each diaphragm These feed motion related signals back 20 to circuits that ensure each 500 W power amplifier produces exactly the right drive current under all 10Hz 20 50 100 200 500 1K 2 5 10 conditions resulting in a highly accurate and extended low Anechoic response flat frequency response 3 K DRIVER ARRAY TECHNOLOGY An innovative positioning technique is used on the 328A 20 50 whereby the midrange tweeter and super tweeter drivers are mounted on the 3 K driver array patent applied for in Treble 1 5 dB front of an acoustically shaped reflection cavity extending below the baffle plane This provides unmatched signal Bass roll on 50 Hz Treble 1 5 dB reproduction accuracy in the mid and high frequency Bass roll on 100 Hz ranges together with excellent stereo imaging and dispersion The 3 K driver array is user replaceable as a unit 10Hz 20 50 100 200 AMPLIFIERS AND POWER SUPPLIES 500 1K 2 5 10 20 50 er Anechoic response showing effect of Treble Shelf All five amplifiers are conservatively rated for delivering and
15. t beyond that described in the operating instructions All other servicing should be referred to qualified service personnel Copyright and Acknowledgements Copyright 2003 Linn Products Limited First edition June 2003 Linn Products Limited Floors Road Waterfoot Glasgow G76 OEP Scotland United Kingdom All rights reserved No part of this publication may be reproduced stored in a retrieval system or transmitted in any form or by any means electronic mechanical photocopying recording or otherwise without the prior written consent of the publisher Linn and the Linn logo are registered trade marks of Linn Products Limited ar Q Printed in the United Kingdom Linn Part Number PACK 848 The information in this manual is furnished for informational use only is subject to change without notice and should not be construed as a commitment by Linn Products Limited Linn Products Limited assumes no responsibility or liability for any errors or inaccuracies that may appear in this manual UK USERS PLEASE READ THIS IMPORTANT SAFETY INFORMATION Replacing the fuse in the mains plug This appliance is fitted with a non rewireable 10 Amp mains plug The plug contains a 10 Amp fuse If the fuse has blown it can be replaced as follows a Pull out the red fuse cover carrier b Remove and dispose of the blown fuse c Fit anew 10 Amp BS1362 approved fuse into the carrier and push the carrier back into the plug Always
16. the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures e Reorient or relocate the receiving antenna e Increase the separation between the equipment and receiver e Connect the equipment into an outlet on a circuit different from that to which the receiver is connected e Consult the dealer or an experienced radio TV technician for help English System Overview Introduction High Sound Pressure Level warning Cellphone warning Applications Unpacking Inspection Voltage selection Technical Overview Twin LF drivers Closed loop LF control 3 K driver array technology Amplifiers and power supplies Cabinet design Graphs Features Mains Power inlet fuse drawer Power on indicator Overload protection Controls Balanced Audio in Speaker Sensitivity Treble Shelf Bass Roll on Installation and Operation Mounting recommendations Connecting the Audio Input Servicing LF Driver removal and replacement 3 K Driver Array removal and replacement Fuse replacement Ordering spares Cleaning Technical Specification System Overview ao A SB SP PP BWW wWWWWWWWWWANHNNNNNNRPRRP RR R PF RE INTRODUCTION The Linn 328A is a fully active 4 way self powered reference monitor designed for professional audio applications where accurate revealing and realistic playback is essential Employing unique Linn playback technology the 328A offers hi

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