G Series Power Amplifier User Guide
Contents
1. O e Connect one of each pair of the red and black terminals from the appropriate channel of the To bi wire to passive loudspeakers O O O Loudspeaker G55 2 Channel Power Amplifier Loudspeaker O z a l e Set the BRIDGE MODE selector to the OFF position appropriate channel of the Gd6 G57 using twin loudspeaker cable Important Remove the links bridging the LF and HF terminals on the back of each loudspeaker e Connect the HF red and black terminals from each loudspeaker to the other pair of red and black terminals on the appropriate channel of the G56 G57 e Connect the LF red and black terminals from each loudspeaker to the red and black terminals on the 22 Installing the power amplifier To wire to a passive loudspeaker in bridge mode O DI O G57 2 Channel Power Amplifier Loudspeaker one O O y2 O O Input You can use the G57 as a mono power amplifier to obtain more than twice the power output by wiring it in bridge mode e Switch the BRIDGE MODE selector to the ON position e Fit the supplied bridge mode link between the left and right negative terminals e Connect the audio inputs to the BALANCED or UNBALANCED BRIDGE MODE input as appropriate e Connect the loudspeaker between the BRIDGE MODE terminals You can bi wire in bridge mode by using the other pair of BRIDGE MODE terminals to connect separately t2. PE29 6YE England Tel 01480 445678 Fax 01480 445686 Sales and service in the USA Meridian America Inc 110 Greene Street Suite 407 New York NY 10012 USA Tel 646 66 0140 Fax 646 66 0152 Designed and manufactured in the UK Meridian Audio Ltd Latham Road Huntingdon Cambridgeshire PE29 6YE England Visit us on the Web http www meridian audio com Copyright 2003 2014 Meridian Audio Ltd Part no GPA 4 P86008 BoothroydlStuart Meridian Meridian Meridian Digital Theatre MHR MLP LipSync and Sooloos are registered trademarks of Meridian Audio Ltd This guide was produced by Human Computer Interface Ltd http www interface co uk Product Registration Register your Meridian power amplifier product at www meridian audio com support and receive Exclusive Meridian News and discover more about the Meridian Collection 1 Introduction Introduction This Installation Guide applies to the G55 Five channel Power Amplifier and G57 Two channel Power Amplifier The main differences between each of these products are explained in the following table Product Channels Power per channel Bridged 100W into 8Q 160W into 40 300W into 8Q 200W into 80 330W into AND 620W into 8Q The G Series power amplifiers provide unbalanced and balanced inputs and are bridgeable This guide provides full information about unpacking the power amplifier and connecting it to the other equipment in the sy
3. O O Input Input Extremely high sound quality can be achieved using two separate channels of the power amplifier to drive the LF and HF units in each loudspeaker e Switch the BRIDGE MODE selectors to the OFF position Important Remove the links bridging the LF and HF terminals on the back of each loudspeaker e Connect the red and black terminals from the LF and HF units on the left loudspeaker to the red and black terminals on channels 1 and 2 e Likewise connect the LF and HF units from the right loudspeaker to channels 4 and 5 e Connect the left audio output from the preamplifier to both inputs on channels 1 and 2 e Connect the right audio output from the preamplifier to both inputs on channels 4 and 5 19 Installing the power amplifier To connect two G55s to a seven channel surround system 0 U 0 U G55 5 Channel Power Amplifier G55 5 Channel Power Amplifier Main right input Side right input Main left input Rear right input Rear left input Side left input Centre input O O O O O O O O O O O O O O O O Ey 9 SA gt O oO O O O O Main right Side right Main left Rear right Rear left Side left Two G55 Five channel Power Amplifiers can be used as the basis of a superb seven channel surround system taking advantage of bridge mode operation to give more than twice the power output for the thr
4. should be removed by light rubbing with a slightly damp cloth and a trace of proprietary glass cleaner Do not use any other solvent or abrasive based cleaners Ensure that no liquid enters the casework and that the product is completely dry before re connection To clean the audio connections The audio sockets on the back of the product are gold plated and do not need to be cleaned if gold plated phono plugs are used Otherwise it is recommended that you unplug and reconnect the plugs at least once a year A proprietary contact cleaner can be used to some advantage To change the mains fuse e Remove the mains connector and pull out the drawer above the power input to access the fuse Before replacing a blown fuse it is best to ascertain the cause of the failure The fuse drawer includes a spare fuse This should be replaced by a fuse of the same rating ai Troubleshooting 28 Troubleshooting Service and guarantee Service The Meridian G Series of hi fi components has been carefully designed to give years of untroubled service There are no user serviceable parts inside the case nor do the units require any form of maintenance In the unlikely event that your product fails to function correctly it should be returned in its original packaging to your Meridian dealer In case of difficulty within the UK or USA please contact the appropriate sales and service address shown on page iv In case of di
5. Controller Ep G57 2 Channel Power Amplifier O0 o 0 oo O p G65 Digital Surround Controller ANALOGUE ANALOGUE OUTPUTS OUTPUTS O 0000 XLR leads 2 x G57 2 Channel Power Amplifiers Three G57 Two channel Power Amplifiers can be used in bridge mode for each of the front channels of a G65 Digital Surround Controller which are provided as balanced outputs e Switch the BRIDGE MODE selector to the ON position e Fit the supplied bridge mode link between the left and right negative terminals e Connect the LEFT RIGHT and CENTRE balanced outputs from the G65 to the left BALANCED input on the G57 e Switch the channels to the BALANCED position Outputs G55 Five channel Power Amplifier Bridge mode link for channels 4 amp 5 Select bridge mode for channels 4 amp 5 CHANNEL 4 15 Installing the power amplifier Bridge mode link for channels 1 amp 2 Select bridge mode for channels 1 8 2 Power and fuse Outputs channel 5 to channel 1 Use this output To connect to this Fan output CHANNEL 1 to CHANNEL Loudspeakers of 2Q to 150 using either plug or bare wire connections 5 FAN OUTPUT A Meridian rack mount kit This is a proprietary Meridian connection The recommended assignment of channels to make best use of the capacity of each power supply is as follows e Chann
6. G Series Power Amplifier User Guide Preface Important safety instructions e Read the instructions e Keep these instructions Follow all instructions e Do not use this apparatus near water e Clean only with a dry cloth e Install only in accordance with the manufacturer s instructions e Refer all servicing to approved service personnel WARNING TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS APPARATUS TO RAIN OR MOISTURE This apparatus has been designed with Class 1 construction and must be connected to a mains socket outlet with a protective earthing connection the third grounding pin This apparatus uses a single pole power switch As a result it is not isolated from AC mains power when switched off at the rear panel The apparatus may be isolated from mains power either by unplugging the power connector from the rear of the unit or by unplugging the connector at the opposing end of the power cord or cable from its supply outlet As a result either or both of these connectors should remain accessible Safety warnings e Do not expose the unit to dripping or splashing e Do not place any object filled with liquid such as a vase on the unit e Do not place naked flame sources such as lighted candles on the unit To avoid overheating e Leave at least 10cm around the equipment to ensure sufficient ventilation Do not position the product e In direct sunli
7. GGER INPUT A mono 3 5mm jack plug input centre pin hot that can be supplied with 5 30V AC or DC to bring the power amplifier out of standby Can be connected to the trigger output on a G Series control unit or digital surround controller Select the appropriate input using the UNBALANCED BALANCED selector for each channel 7 Installing the power amplifier 8 Installing the power amplifier To connect the G55 to an unbalanced preamplifier eg Meridian Prime Headphone Amplifier G55 5 Channel Power Amplifier O O O O O O O O O O O O O O O O O O O O loo O Meridian Prime Headphone Amplifier ANALOGUE OUT Phono leads e Switch the BRIDGE MODE selectors to the OFF position e Connect the UNBALANCED sockets on the power amplifier to the outputs from the preamplifier e Switch the corresponding channels to the UNBALANCED position You should either use a twin screened audio cable or a pair of single screened audio cables 9 Installing the power amplifier To connect the G55 to a balanced preamplifier eg Meridian 818 Reference Audio Core G55 5 Channel Power Amplifier O O O O O O O O O O O O O O O O O O O O O O Q O O 818 Reference Audio Core BALANCED AUDIO OUT XLR leads e Switch the two BRIDGE MODE selectors to the OFF position e Connect the BALANCED sockets on the power amplifier t
8. ail to cure the problem please contact your Meridian dealer for further assistance 26 Troubleshooting Troubleshooting No front panel indicator is shown e Check that the AC power supply is connected correctly e Check that the ON OFF switch on the back panel is in the ON position e Check that the fuse on the product s back panel and the fuse in the unit s power plug have not blown see To change the mains fuse page 24 The sound has cut out The G Series power amplifiers include a thermal shutdown which mutes the output if the amplifier becomes too hot The Standby LED will also become red e Leave the amplifier for a few minutes to cool down the Standby LED will turn blue The amplifier can then be taken out of standby using the front panel button or the TRIGGER INPUT The G Series power amplifiers also include a power circuit breaker to protect the loudspeakers This is triggered by excessive DC on the input extreme thermal overload or if the mains supply is interrupted e Check the system for the cause of the cut out e Switch off wait five seconds then switch on to reset the power Maintenance To clean the case e Disconnect the power cord before cleaning the unit The exterior surfaces of Meridian G Series products are made from solid anodised aluminium powder coated steel thermoplastic rubber and glass They are designed to be easily wiped clean with a dry lint free cloth Greasy marks
9. capacitors e G57 Dual mono construction 5 pairs of 15A output devices 2 high quality smoothing capacitors per side 40 000uF used in total Characteristics e Distortion less than 0 01 e Signal noise better than 100dB Control signals Trigger input 5 30VDC e Fan control output for connection to a Meridian rack mount kit 3 Introduction Physical e Dimensions 440mm x 132mm x 350mm 17 32 x 5 20 x 13 78 W x H x D e Weight G55 20kg 44b G57 24kg 531b Power e 100 125 200 250V AC 50 60Hz e 20VA standby 600VA max Meridian Audio reserves the right to amend product specifications at any time 4 Introduction Installing the power amplifier This chapter explains how to install the power amplifier It describes what you should find when you unpack the product and how you should connect it to the other equipment in the system You should not make any connections to the product or to any other component in the system while the AC power supply is connected and switched on 5 Installing the power amplifier 6 Installing the power amplifier Unpacking The power amplifier is supplied with the following accessories e Power cord e Bridge mode links G55 2 G57 1 e This manual If any of these items are missing please contact your dealer Note You should retain the packaging in case you need to transport the unit Siting During normal operation the
10. ee front channels e Switch channels 1 2 and 4 5 of the first G55 to bridge mode and use these for the main left and right loudspeakers e Switch channels 1 2 of the second G55 to bridge mode and use these for the centre loudspeaker e Use the remaining channels for the side and rear loudspeakers as shown in the diagram 20 Installing the power amplifier G57 Two channel Power Amplifier Power switch and fuse Bridge mode link INPUT LEFT BRIDGE MODE INPUT del OUTPUT RIGHT OUTPUT LEFT SA Right speaker terminals L Left speaker terminals Bridge mode selector Fan output Use this output To connect to this LEFT RIGHT Loudspeakers of 20 to 160 using either plug or bare wire connections FAN OUTPUT A Meridian rack mount kit This is a proprietary Meridian connection Each channel of the G57 Two channel Power Amplifier provides twin outputs for bi wiring This allows separate connections to be made to the bass mid and tweeter units on speakers that allow bi wiring for optimum sound quality Alternatively for loudspeakers providing a single pair of inputs either of the output terminals can be used 21 Installing the power amplifier To connect to passive loudspeakers O O O I 1 O Loudspeaker G57 2 Channel Power Amplifier Loudspeaker Siem ES e Set the BRIDGE MODE selector to the OFF position G56 G57 to the red and black terminals on the loudspeakers
11. els 1 amp 2 main left and right e Channel 3 centre e Channels 4 amp 5 rear left and right respectively If only two channels are needed use channels 1 amp 5 Alternatively channels 1 2 and 4 5 can be used in bridge output mode see 7o wire to passive loudspeakers in bridge mode page 17 Each channel of the G55 Five channel Power Amplifier provides twin outputs for bi wiring On speakers that provide separate connections to the bass mid and tweeter units this allows the units to be connected independently to the power amplifier for optimum sound quality Alternatively for loudspeakers providing a single pair of inputs either of the output terminals can be used 16 Installing the power amplifier To connect to passive loudspeakers O O T7 O O Loudspeaker G55 5 Channel Power Amplifier Loudspeaker O O O O O oO Oo 8 Oo O O O O oe O OO e Set the BRIDGE MODE selectors to the OFF amplifier to the red and black terminals on the position corresponding loudspeaker e Connect one of each pair of the red and black terminals from the appropriate channel of the power To bi wire to passive loudspeakers Loudspeaker G55 5 Channel Power Amplifier Loudspeaker O O O O o OO O O O O O O 16 O O O e Set the BRIDGE MODE selectors to the OFF appropriate channel of the power amplifier using twin position louds
12. fficulty outside the UK or USA contact the importing agent for the territory A list of Meridian agents outside the UK is available from Meridian Audio No responsibility can be accepted for the product whilst in transit to the factory or an agent and customers are therefore advised to insure the unit When seeking service under guarantee proof of the date of purchase will be required Guarantee The product is guaranteed against defects in material and workmanship for two years from the date of purchase The guarantee is void if the product has been subject to misuse accident or negligence or has been tampered with or modified in any way without the written authorisation of Meridian Audio Limited Attempted servicing by unauthorised people may also invalidate this guarantee Labour and carriage charges are not covered unless by local agreement Outside the UK local warranty liability is restricted to equipment purchased within the territory Our agents outside the UK are only under contractual obligation to service under guarantee equipment sold through them They are entitled to make a non refundable charge for any service carried out on other equipment This guarantee does not limit your statutory rights within the country of purchase Index A accessories 6 B balanced preamplifier connecting to G55 9 G57 13 bi amping G55 18 G57 23 bi wiring G55 16 G57 21 bridge mode G55 17 G57 22 C cleani
13. ght e Near heat sources such as a radiator e Stacked with any other audio products as the heat it generates may damage the other products e On a soft surface such as a carpet which would obstruct the ventilation holes in the base The sides base and top of the G Series Power Amplifier case contain venting holes for the internal heatsinks which should not be obstructed Ensure that air can flow around them The product normally runs warm to the touch when not in standby Radio interference FCC Warning This equipment generates and can radiate radio frequency energy and if not installed and used correctly in accordance with our instructions may cause interference to radio communications or radio and television reception It has been type tested and complies with the limits set out in Subpart J Part 15 of FCC rules for a Class B computing device These limits are intended to provide reasonable protection against such interference in home installations EEC This product has been designed and type tested to comply with the limits set out in EN55013 and EN55020 ce Contents Introduction General features Specifications Installing the power amplifier Unpacking Inputs Outputs Troubleshooting Maintenance Service and guarantee Index 25 27 28 29 IV Preface Copyright and acknowledgements Sales and service in the UK Meridian Audio Ltd Latham Road Huntingdon Cambridgeshire
14. iability The result is a clear open sound with detail as well as punch where it s required Trigger and other control signals are optically isolated from the amplifier itself When in standby mode a standing voltage is maintained on the power rails and supply components As a result you only have to wait for a short time after switching on for optimum performance to be achieved Two sets of outputs are provided per channel for bi wiring etc on sturdy binding posts colour coded for easy reference and capable of handling large diameter high quality loudspeaker cables The output terminals are connected to the amplifiers by Van Den Hul silver strand cable to avoid signal losses The amplifiers include electronic protection reset by power cycling with full DC and thermal protection A front panel indicator shows when the amplifier is in standby When the unit is activated an LED illuminates for each channel In the event of thermal overload the main indicator goes red and the channel lights go out showing that the unit is off line A push button on the front panel can be used to take the unit in and out of standby while flexible 5 30V trigger capability allows amplifier power to be controlled remotely along with the rest of a system G55 Five channel Power Amplifier The Meridian G55 is a five channel unit and delivers a solid 100W RMS per channel continuous into 80 The outer pairs of channels can be operated in bridge
15. internal heatsinks may become quite hot The power amplifier should therefore be positioned to allow a free flow of air through the cooling vents from the base to the top Do not place the power amplifier e In direct sunlight e Near heat sources such as a radiator e Stacked with any other audio products as the heat it generates may damage the other products e On a soft surface such as a carpet which would obstruct the ventilation holes in the base Standby Once set up the power amplifier can be left in standby as it consumes minimal power in this mode To bring the amplifier out of standby press the button on the front panel Alternatively the unit can be brought out of standby automatically using the TRIGGER INPUT see below If you are not going to use the power amplifier for a period of several days you should switch off the unit completely at the back panel and disconnect it from the AC power supply Trigger input The TRIGGER INPUT can be used to bring the power amplifier out of standby by applying a signal from a control unit Inputs G55 Five channel Power Amplifier Unbalanced inputs CHANNEL 4 CHANNEL 2 A Balanced inputs Use this input To connect to this Trigger input UNBALANCED A preamplifier using phono connectors and high quality screened cable BALANCED A balanced analogue output using XLR connectors 1 Green GND 2 Red ve 3 Black ve TRI
16. mode by actuating a back panel rocker switch on the channel 1 and or channel 5 modules in which case the first channel input of the pair becomes the bridged input and the upper output terminals are linked power being derived from the lower terminal pairs G57 Two channel Power Amplifier The Meridian G57 is a solid robust two channel unit delivering a powerful 200W RMS per channel continuous into 8Q or up to a full kilowatt bridged into 40 The amplifier can be operated in bridge mode by actuating a switch on the back panel in which case the left channel input becomes the input for the bridged pair and the inner output terminals are bridged power being derived from the outer terminal pairs Specifications Audio inputs e Balanced on XLR and unbalanced on phono e Sensitivity 1 0V RMS phono per leg balanced e Input impedance 16kQ phono 32kQ balanced Audio outputs e Twin outputs for bi wiring e G55 5 channels at 100W into 8Q or 2 channels at gt 300W into 8Q bridged and 1 channel at 100W e G57 2 channels at 200W into 80 gt 620W into 80 bridged 1000W into 4Q bridged e Low feedback design e Ultra low impedance error corrected output stage e DC coupled with no capacitors in signal path e Optimised magnetic circuit design e Full DC and thermal overload protection e Meridian proprietary soft start Output stages e G55 25 pairs of 15A output devices and 68 000uf of audiophile grade PSU smoothing
17. ng 27 connections cleaning 27 F fan control output 15 20 G G55 Five channel Power Amplifier 1 bi amping 18 bi wiring 16 bridge mode 17 connecting to speakers 16 inputs 7 G55 Five channel Power Amplifier continued outputs 15 seven channel surround system 19 G57 Two channel Power Amplifier 1 bi amping 23 bi wiring 21 bridge mode 22 connecting to speakers 21 inputs 11 outputs 20 G65 Digital Surround Controller connecting to G55 10 G57 14 guarantee 28 inputs 7 L loudspeakers connecting to G55 16 18 G57 21 23 M mains fuse changing 27 Meridian 818 Reference Audio Core connecting to G55 9 G57 13 Meridian Prime Headphone Amplifier connecting to G55 8 G57 12 O outputs 15 P preamplifier connecting to 12 S safety warnings ii seven channel surround system connecting to 19 specifications 3 standby 6 T trigger input 6 11 troubleshooting 25 U unbalanced preamplifier connecting to 8
18. o the loudspeaker treble unit To bi amp to two passive loudspeakers O Q Loudspeaker G57 2 Channel Power Amplifier O IL O G57 2 Channel Power Amplifier Loudspeaker Extremely high sound quality can be achieved using two Connect the red and black terminals from the LF and separate G57 Two channel Power Amplifiers one to HF units on one loudspeaker to the red and black drive each loudspeaker The two channels in each G57 terminals on each channel of one amplifier Two channel Power Amplifier are used to drive the LF and HF units in each loudspeaker e Likewise connect the LF and HF units from the other loudspeaker to the red and black terminals on e Switch the BRIDGE MODE selector on both each channel of the other amplifier pe 1 AEE postion e Connect the left audio output from the preamplifier to Important Remove the links bridging the LF and HF both inputs on one amplifier scribes one bali or ear loudspeaker e Connect the right audio output from the preamplifier to both inputs on the other amplifier 23 Installing the power amplifier 24 Installing the power amplifier 25 Troubleshooting Troubleshooting We expect you to achieve superb results with the power amplifier If however you encounter any problems either when installing it or during operation please check the following pages for suggested solutions If these suggestions f
19. o the balanced outputs from the preamplifier using XLR cables e Switch the corresponding channels to the BALANCED position 10 Installing the power amplifier To connect the G55 to a G65 Digital Surround Controller G55 5 Channel Power Amplifier GO OO O QIOROIO 0000 O GOO OO O 00 00 O p G65 Digital Surround Controller ANALOGUE ANALOGUE OUTPUTS OUTPUTS OO XLR leads e Switch the two BRIDGE MODE selectors to the OFF position e Connect the LEFT RIGHT and CENTRE balanced outputs from the G65 to the channel 1 2 and 3 BALANCED inputs on the G55 e Connect the REAR L and REAR R phono outputs from the G65 to the channel 4 and 5 BALANCED inputs on the G55 e Switch all channels to the BALANCED position 11 Installing the power amplifier G57 Two channel Power Amplifier Right balanced input Left balanced input Right input selector Left input selector Right unbalanced input Left unbalanced input INPUT EFT BRIDGE m 1 ro c OUTPUT RIGHT OUTPUT LEFT A A Trigger input Use this input To connect to this UNBALANCED A preamplifier using phono connectors and high quality screened cable BALANCED A balanced analogue output using XLR connectors 1 Green GND 2 Red ve 3 Black ve TRIGGER A mono 3 5mm jack plug input centre pin hot that can be supplied wi
20. peaker cable Important Remove the links bridging the LF and HF e Connect the HF red and black terminals from each terminals on the back of each loudspeaker loudspeaker to the other pair of red and black e Connect the LF red and black terminals from each loudspeaker to the red and black terminals on the amplifier terminals on the appropriate channel of the power 17 Installing the power amplifier To wire to passive loudspeakers in bridge mode Loudspeaker G55 5 Channel Power Amplifier Loudspeaker O O O O O O O O O O ae O lt 9 Input Input You can wire channels 1 2 and 4 5 in bridge output mode to obtain more than twice the power output e Switch the BRIDGE MODE selectors to the ON position e Connect the supplied bridge mode links between he black CHANNEL 1 2 and CHANNEL 4 5 erminals as marked on the back panel e Connect the loudspeakers between one pair of he red CHANNEL 1 2 and CHANNEL 4 5 erminals e Connect the audio inputs to the BALANCED or UNBALANCED CHANNEL 1 and CHANNEL 5 inputs as appropriate You can bi wire in bridge mode by using the other pair of red terminals to connect separately to the loudspeaker treble unit 18 Installing the power amplifier To bi amp to two passive loudspeakers O O O O Loudspeaker G55 5 Channel Power Amplifier Loudspeaker O O O O O O O O O O O O
21. stem 2 Introduction General features Each of the G Series power amplifiers is based on modules that feature a symmetrical design with fully electronically balanced inputs Both balanced and unbalanced inputs are provided but in fact the unbalanced inputs are converted to balanced before they enter the amplifier itself using Meridian s proprietary superbal technology The discrete active input components are thermally and electrically matched in pairs and the amplifiers feature active bias control throughout with thermal sensing that carefully manages the temperature and current flow at different volume levels Fully DC coupled the signal path contains no unnecessary capacitors while those in the power supplies are audiophile grade components The amplifiers are of a unique low feedback design for minimum transient and intermodulation distortion offering superb clarity and transparency right across the audible range with an output impedance that is close to zero and suitable for virtually any high quality third party passive loudspeaker system Special attention has been paid to ensure that the amplifiers can deliver the power that s required at any given moment Massive low noise toroidal power transformers provide power to a generous five selected pairs of output devices per channel carefully temperature controlled for optimum operating characteristics and efficiency and with thermal protection for rel
22. th 5 30V AC or DC to bring the INPUT power amplifier out of standby Can be connected to the trigger output on a G Series control unit or digital surround controller Select the appropriate input using the UNBALANCED BALANCED selector for each channel 12 Installing the power amplifier To connect to an unbalanced preamplifier eg Meridian Prime Headphone Amplifier I T G57 2 Channel Power Amplifier O O O O O 00 O Meridian Prime Headphone Amplifier ANALOGUE OUT Phono leads e Switch the BRIDGE MODE selector to the OFF position e Connect the UNBALANCED sockets on the power amplifier to the outputs from the preamplifier e Switch the channels to the UNBALANCED position You should either use a twin screened audio cable or a pair of single screened audio cables 13 Installing the power amplifier To connect to a balanced preamplifier eg Meridian 818 Reference d T G57 2 Channel Power Amplifier Audio Core OO 818 Reference Audio Core BALANCED AUDIO OUT XLR leads e Switch the BRIDGE MODE selector to the OFF position e Connect the BALANCED sockets on the power amplifier to the balanced outputs from the preamplifier using XLR cables e Switch the channels to the BALANCED position 14 Installing the power amplifier To connect to each channel of a G65 Digital Surround
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