Xantech PA435X Stereo Amplifier User Manual
Contents
1. MRC88 Rear Panel nes 7 amp 8 PREAMP OUT PREAMP OUT o 0 srarus 0 ZONE RO PA435X REMOTE AMP REMOTE AMP Rear Panel CO VIDEO CO VIDEO OUT7 OUT 8 3 5mm Stereo Mini Plug Cables LEFT RIGHT L A MODE ci ci STEREO 1 2 PE BRIDGED av A LEVEL o a f NN BRIDGED POWER SPEAKER LEFT RIGHT Figure 8 Using the PA435X REMOTE MASTER ON OFF CONTROL Terminals 2003 Xantech Corporation Model PA435X Page 13 A Multi Zone System Diagram Using The PA435X and MRC88 Fig 9 following shows the PA435X in a typical multi room system with a Xantech MRC88 eight zone preamp Bi de te EXPANSION PORT PREAMP OUT 0 0 Ca s JO 5 10 2 10 o REMOTE AMP VIDEO EO co1 VIDEO 3 Goma Senn a fa 7 OUT 3 OUTS Use 3 5mm _ Stereo Mini Plug N RCA Type Cables y Patch Cords fis ZONE 7 ZONE 8 To Speakers in Rooms Figure 9 Interfacing the PA435X with an MRC88 Zones 7 8 8 In this case 1 2 3 Using good quality RCA Stereo Patch Cords connect the Preamp Outputs of Zone 7 on the MRC88 to the Left and Right Audio Inputs labeled A on the rear of the PA435X Similar to step 1 connect the Preamp Outputs of Zone 8 on the MRC88 to the Left and Right Audio Inputs labeled B on the rear of the PA435X Using two 3 5mm Stereo Mini Plug cables connect the Remote Amp C2. Right Figure 7 Bridged Mode Connections Bridged Mode Connections In general it is recommended that the BRIDGED mode not be used in multi room applications where several speakers are driven through room volume controls and the like For such applications use the STEREO mode Use the BRIDGED mode for single speaker higher power applications such as in surround sound systems Use speakers with an impedance rating of 8 Ohms minimum To make connections for the BRIDGED mode follow the steps given before for stereo connections but with the following differences 1 You may connect the RCA type patch cables from the OUTPUT jacks of the driving preamp or other source to either the LEFT or the RIGHT input jacks of the bridged pair as shown in Fig 6 Do this for just the amplifier pairs you wish to run in the bridged mode CAUTION Be sure Power is OFF when connecting or switching the amp into or out of BRIDGED operation 2 Slide the MODE switch to the BRIDGED position NOTE Do this only on the amplifier pairs you wish to run in the bridged mode 3 Connect one speaker wire pair between the 4 terminal SPEAKER connectors on the PA435X and the speakers as shown in Fig 6 Be sure to use only the two outer terminals marked and on the 4 terminal connector as shown on the panel for BRIDGED connections NOTE Only one speaker is connected per amplifier pair in the BRIDGED mode 2003 Xantech Corporation Page
3. NOTE To set the Input Level Control for matched output to the MRC88 Speaker output set the Input Level Control on both pairs to the 7v 1 30 position as shown in Figure 4 below Matched MRC88 Setting a 0 7v 1 30 position Figure 4 PA435X Level Adjustment setting when used with MRC88 8 MODE Switch Switches the amplifier pair between STEREO MONO and BRIDGED modes a In STEREO mode the two amplifiers operate independently of each other for 35 Watts of output each b In MONO mode left and right input signals are summed internally for Mono output from each of the two amplifiers When interfacing a mono audio source either the Left or Right item 6 inputs may be used c In BRIDGED mode the two amplifiers are bridged for a single channel of high power output 70 Watts 8 Ohms Either the Left or Right input item 6 may be used to drive the resultant single channel amplifier O 2003 Xantech Corporation Model PA435X Page 7 10 11 12 AA caution Be sure to have the rear AC LINE POWER switch Item 15 turned OFF O when changing the position of this switch and when making the corresponding speaker connection changes FUSE When required replace only with a fuse of the same type and rating 120 V Version 6 25 AMP 250 VAC SLOW BLOW 240 V Version 3 15 A Time Lag 250 VAC NOTE Replacement with a fuse of higher rating will not protect the amplifier and will void the warranty SPEAKER Te
4. 12 Model PA435X CAUTION When operating in the BRIDGED mode particularly when bench testing the amplifier do not make a ground or any other kind of connection to the amplifier speaker terminals other than those to the individual speakers as shown Failures caused by inappropriate connections are not covered under the warranty Connecting the REMOTE MASTER ON OFF MUTE CONTROL As mentioned under PA435X PANEL AND FEATURE DESCRIPTIONS the REMOTE MASTER ON OFF CONTROL inputs CI1 8 CI2 will allow the power to the PA435X to be turned ON OFF and MUTED by remotely applied DC Voltages Fig 8 illustrates how a PA435X can be switched ON and OFF via the MRC88 Zone 7 8 8 Control Outputs CO1 and CO2 On Off Standby Control Whenever a 5 to 30v dc voltage is applied to the TIP of the 3 5mm Stereo jack the associated Amplifier channel will be activated Powered ON When the signal applied to the TIP approaches GND it will put the associated Amplifier channel in STANDBY Mode If both Amplifier channels are in STANDBY MODE and the front POWER SWITCH left in the OUT position the entire Amplifier will be powered down Illuminated LOGO OFF Mute Control Whenever a 5 to 30v dc voltage is applied to the RING of the 3 5mm Stereo jack the associated Amplifier channels signal output will be MUTED When the signal applied to the RING approaches GND it will UN MUTE the associated Amplifier channel and the audio signal will be returned to its previous level
5. XANTECH CORPORATION 12950 Bradley Avenue Sylmar CA 91342 3829 phone 818 362 0353 fax 818 362 9506 www xantech com Part No 08901190 Rev B 04 01 2003 O 2003 Xantech Corporation
6. appliance Cleaning The appliance should be cleaned only as recommended by the manufacturer Power Lines An outdoor antenna should be located away from the power lines Nonuse Periods The power cord of the appliance should be unplugged from the outlet when left unused for a long period of time Object and Liquid Entry Care should be taken so that objects do not fall and liquids are not spilled into the enclosure through openings Damage Requiring Service The appliance should be serviced by qualified service personnel when A The Power supply cord or the plug has been damaged or B Objects have fallen or liquid has spilled into the appliance or C The appliance has been exposed to rain or D The appliance does not appear to operate normally or exhibits a marked change in performance or E The appliance has been dropped or the enclosure damaged Servicing The user should not attempt to service the appliance beyond that described in the operating instructions All other servicing should be referred to qualified service personnel O 2003 Xantech Corporation Model PA435X Page 3 GENERAL INFORMATION To enhance the ease of installation and obtain optimum performance from the PA435X we recommend that you first become familiar with all its features and special capabilities by studying the descriptions and instructions in this manual The PA435X was designed to meet the audio power amplifier needs of custom ins
7. with a cart or stand that is recommended by the manufacturer An appliance and cart combination should be moved with care Quick stops excessive force and uneven surfaces may cause the appliance and cart combination to overturn Wall or Ceiling Mounting The appliance should be mounted to a wall or ceiling only as recommended by the manufacturer Ventilation The appliance should be situated 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 Heat The appliance should be situated away from heat sources such as radiators heat registers stoves or other appliances including amplifiers that produce heat Power Sources The appliance should be connected to a power supply only of the type described in the operating instructions or as marked on the appliance Grounding or Polarization Precautions should be taken so that the grounding or polarization means of an appliance is not defeated Power Cord Protection Power supply cords should be routed 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 convenience receptacles and the point where they exit from the
8. 435X PANEL AND FEATURE DESCRIPTIONS 1 Front Panel 17 X 3 5 panel designed for shelf mounting The unit measures 4 high with the Feet Item 5 When rack mounting use an adequate rack shelf mount making sure to allow for proper ventilation PA435X lt xantech FOUR CHANNEL POWER AMPLIFIER FIGURE 2 THE MODEL PA435X FRONT PANEL FEATURES AND FUNCTIONS 2 POWER STANBY SWITCH POWER ON OFF MODE When the front switch is pressed to the IN position the PA435X may be controlledremotely from the MRC88 leaving the amplifier in STANDBY MODE when any of the Zones are powered OFF via the Cl1 and CI2 Control Inputs STANDBY MODE When the front switch is the OUT position the amplifier may be totally controlled via the MRC88 turning the amp ON when either Zone of the MRC88 is powered up and powering the amp OFF when both Zones are OFF via the CI1 and CI2 Control Inputs NOTE The rear power switch Item 15 needs to be in the ON I position for both modes of operation 3 Status LED Indicators These indicators one for each channel pair provide the following status information GREEN LED Indicates Amplifier is ON RED LED Indicates associated channel output is in a CLIPPING state LED will go back to GREEN 5 6 seconds after clipping subsides ALL LED s OFF Indicates both amplifier channels are OFF or in STANBY MODE see Item 4 for STANDBY MODE 4 Illuminated LOGO This is a backlit logo When lit it indicat
9. ERVICE PERSONNEL The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of un insulated dangerous voltage within the product s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance servicing instructions in the literature accompanying the appliance WARNING TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE This product was designed and manufactured to meet strict quality and safety standards There are however some installation and operation precautions which you should be particularly aware of NANA o 18 Read Instructions All the safety and operating instructions should be read before the appliance is operated Retain Instructions The safety and operating instructions should be retained for future reference Heed Warnings All warnings on the appliance and in the operating instructions should be adhered to Follow Instructions All operating and use instructions should be followed Water and Moisture The appliance should not be used near water for example near a bathtub washbowl kitchen sink laundry tub in a wet basement or near a swimming pool etc Carts and Stands The appliance should be used only
10. GHT input jack on the desired channel of the PA435X Both the LEFT and RIGHT input jacks of the PA435X are active in Mono Mode If both jacks are utilized simultaneously the signals placed on the input terminals are summed together 2 Slide the MODE switch to the MONO position 3 Using good quality speaker wire connect the individual speaker leads to the 4 terminal SPEAKER connectors on the PA435 Both the LEFT and RIGHT Speaker outputs will be active with the identical program output 4 The PA435X is 4 Ohm safe in Mono Mode Make sure the impedance presented to the speaker terminals by the speakers or any combination of speakers is 4 Ohms minimum 5 Be sure to observe correct polarity by connecting the and terminal from each channel on the PA435X to the corresponding and terminals on each speaker This will ensure correct phasing see Fig 6 and Speaker Phasing below Since the connectors are removable you may unplug them for ease of lead assembly 6 As a rule of thumb use 18 gauge speaker wire for speaker runs up to 30 9m 16 gauge up to 70 21m and 14 gauge up to 150 39m The 4 terminal connectors accept wire sizes up to 12 gauge max 7 Strip the insulation back about 1 4 6mm and twist the strands on each lead to prevent fraying O 2003 Xantech Corporation Model PA435X Page 11 MRC88 Preamp Ouptus or Other Set MODE RCA Type witch to Patch Cord BRIDGED position
11. INSTALLATION INSTRUCTIONS MODEL PA435X FOUR CHANNEL POWER AMPLIFIER PA435X POWER FOUR CHANNEL POWER AMPLIFIER TABLE OF CONTENTS SectionTitle Page SAFETY INSTRUCTIONS READ BEFORE OPERATING EQUIPMENT sees eee 2 GENERAL INEORMATION t t bay kai tay os avoy it nel kad bwat away kon a ki ben ak ade ron pen epou daye de ap aa A f kayen eum oui when aaanlle 3 PA435X PANELANDFEATURE DESCRIPTION Sis pt aaaeeeaa kn chaaataanthanohaachiachoaaohanatanohAaahagohsawacundes 5 INSTALLATION PHYSICAL LOCATION AND MOUNTING ooooocoococococonoccononcncncononononcocononcococonanon aa e aa N os anno a R KHE KARR et 8 CONNECTINGITHE PAIS hacias on wate a mf duit natin e kt l a n pa a ee to a kn a kt a n ao ke kabap ap ek ap kaa eka ab vad 9 stereo Mode GOnneCtiONS eee etni A ad 9 Speaker N nl NO 10 Mono lee A NN 10 Bridged Mode Connections oooocccnnnccccccccnncocnnnnonncconnnnn aaa aaa aa aaa aaa aa RR RRE RARA RARA RAR RRE RR Ran tiratan tisa iise tinati di 11 Connecting the REMOTE MASTER ON OFF MUTE CONTROL 12 A Multi Zone System Diagram Using The PA435X and MRC88 eee eee 13 TROUBEE SHAOOTING 335680 e an Se A E o MEL O ALO IL 15 SPECIFICATIONS avs rain daa 16 Page 2 Model PA435X SAFETY INSTRUCTIONS READ BEFORE OPERATING EQUIPMENT CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE COVER OR BACK NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED S
12. O1 jack on the rear of the MRC88 to the CM jack on the rear of the PA435X Similar to step 3 connect the Remote Amp CO2 jack on the rear of the MRC88 to the CI2 jack on the rear of the PA435X Set the Input Level Adjustment for both channels on the rear of the PA435X according to Figure 4 This will match the output of the PA435X to the standard output of the other 6 Zones of the MRC88 You can also adjust higher or lower according to customer preference O 2003 Xantech Corporation Page 14 Model PA435X The Remote Amp CO1 8 CO2 Remote Control Jack from the MRC88 allows for individual Zone control directly from the Zone 7 8 8 keypads of the MRC88 system When any one of the zones is turned on the PA435X is powered ON Similarly when either Zone is powered down the associated amplifier pair on the PA435X is put into STANDBY Mode When both Zones 7 8 8 are powered down the PA435X will either go into STANDBY Mode on both amplifier pairs or will be POWERED OFF depending upon the position of the front panel POWER STANDBY button IN STANDBY OUT ON OFF O 2003 Xantech Corporation Model PA435X Page 15 TROUBLE SHOOTING If you encounter a problem please review the items in the following list Be sure in addition to check other system components such as preamplifiers CD players speakers speaker wiring etc that may be at fault PROBLEM PROBABLE CAUSE AND SOLUTION Rear panel Power Indicator does not ligh
13. atts at 8 Ohms Short term continuous each channel 2 channels driven 80 Watts at 4 Ohms 1 kHz at rated THD Bridged Power Output 150 Watts at 8 Ohms Short term continuous one pair driven at 1 kHz at rated THD Rated THD lt 0 08 Damping Factor gt 100 at 50 Hz half rated power S N Ratio gt 100 dB A weighted shorted inputs ref to rated power Frequency Response 12 Hz to 55 kHz at 1 Watt 3dB Input Sensitivity Max 0 2 V at rated power stereo mode input gain Default 1 0 V Minimum 3V Input Impedance Local Inputs 22 kOhms Common Audio Buss Inputs 70kOhms Power Source 120 VAC 60 Hz TMRA 35 Celsius 95 F If this temperature is exceeded you will need to provide additional ventilation to ensure proper operation 240 VAC 50 Hz European version Power Consumption No signal 14 Watts 4 Channels at 1 10 rated power 105 Watts 4 Channels at rated power 420 Watts 4 Channels Bridged at 465 Watts Remote On Off Mute CI1 amp CI2 Voltage Current 5 V to 30 VDC 16 mA at 12 VDC Line Fuse Rating 120V version 6 25A Slow Blow 250 VAC 240V version 3 15A Time Lag 250 VAC Dimensions 17 W x 4 Hx 11 5 D 432 mm W x 102 mm H x 293 mm D Weight 20 4 Ibs 9 3 Kg 2003 Xantech Corporation Model PA435X Page 17 O 2003 Xantech Corporation Page 18 Model PA435X O 2003 Xantech Corporation Model PA435X Page 19 O 2003 Xantech Corporation Page 20 Model PA435X
14. es that the amplifier is powered ON If the individual STATUS LED S Item 3 are OFF but the LOGO is ON This indicates that both amplifier channels are currently in STANDBY MODE Whenever the LOGO is not illuminated this indicates the amplifier is powered OFF 5 Feet Provides required Y spacing when unit is shelf mounted to allow for proper ventilation These feet should not be removed see the section entitled MOUNTING for further information 2003 Xantech Corporation Page 6 Model PA435X oY O A 0O FIGURE 3 PA435X REAR PANEL FEATURES AND FUNCTIONS 6 Line Inputs These RCA type jacks are the audio inputs for each of the amplifier pairs Connect them to the Preamp Output jacks of Zone 7 amp 8 of the MRC88 or other driving preamp output with good quality RCA type patch cables Note that the inputs are marked LEFT A RIGHT LEFT B RIGHT signifying the stereo channel pairs Both the LEFT and RIGHT jacks are always active even when the MODE switch item 8 is set to the MONO or BRIDGED mode 7 Input LEVEL Control This screwdriver adjustable control for each stereo or bridged pair allows the input level for full rated power output to be adjusted over a range of 0 2 volts to 3 volts 24 3 dB Normally you would adjust the driving preamp to maximum volume then set this control to the maximum volume that the client desires for a given zone or room This prevents the system from being driven to unwanted power levels
15. exibility The input levels are individually adjustable per stereo pair from a low of 0 2 volts up to 3 volts This gives the installer the ability to adjust the overall gain of the system or zone For instance there may be a need to adjust the amplifier to deliver a controlled maximum sound level into a zone when the volume control on the preamp is set to maximum This would act as a volume limiter for any particular zone i e to prevent the kids from over driving wall speakers etc When set to the 1 30 position this will match the sensitivity level of the standard Amplifier output setting of the MRC88 Low Impedance Capability Each amplifier is 4 Ohm safe under music conditions in stereo mode and 8 Ohm safe when bridged This means for instance that you can drive two pairs of 8 Ohm speakers in stereo mode in each zone with ease O 2003 Xantech Corporation Page 4 Model PA435X Peak Clip LED Indication Whenever either amplifier channel output starts to enter a clipping state a front panel LED will illuminate RED After the amp stops clipping the LED will return to its normal state 5 6 seconds after clipping stops Auto Protection Circuit This feature protects the PA435X if a short or very low impedance is detected at the speaker terminals with each amplifier pair protected separately Normal operation is restored automatically within 3 to 4 seconds after the short is removed O 2003 Xantech Corporation Model PA435X Page 5 PA
16. ig 6 and Speaker Phasing below Since the connectors are removable you may unplug them for ease of lead assembly 6 As a rule of thumb use 18 gauge speaker wire for speaker runs up to 30 9m 16 gauge up to 70 21m and 14 gauge up to 150 39m The 4 terminal connectors accept wire sizes up to 12 gauge max 7 Strip the insulation back about 1 4 6mm and twist the strands on each lead to prevent fraying caution After lead ends are inserted and the screws tightened down be sure there are no free strands that could cause shorting Speaker Phasing To obtain stable imaging and full bass response it is imperative that stereo speakers be connected in phase with each other You can verify this as follows a If the positive and negative terminals on your speakers are correctly marked and visible and you have wired the system as shown in Figs 5 and 6 then the system will be in phase No further action is required Most manufacturers identify the positive terminal with a red binding post a sign or a red dot b If you are unsure of the markings you can verify the phasing Using a mono sound source such as AM radio alternately reverse the leads to one of the speakers Pick the connection that delivers a solid center image between the speakers as well as best bass response Mono Mode Connections 1 Using good quality RCA type patch cables connect mono output jack of the driving preamp to the LEFT or RI
17. item 13 set to ON I to permit the REMOTE MASTER ON OFF CONTROL to operate See also CAUTION notes Fig 9 13 14 15 3 Conductor AC Line Cord Receptacle Standard IEC male receptacle for plug in of a 3 conductor power line cord Depending on the application plug the line cord into a switched or un switched 120V 60 Hz AC outlet or 240 VAC 50 Hz on the 240 V version Rear Panel ON OFF LED This LED indicates the power ON OFF condition of the entire PA435X whether activated by a REMOTE MASTER ON OFF CONTROL item 11 or from the rear panel AC Line Power switch item 15 Master AC LINE ON OFF Switch Turns power OFF to the entire PA435X regardless of front panel POWER switch conditions Must be placed in the ON l position for the other power switching functions to work O 2003 Xantech Corporation Page 8 Model PA435X INSTALLATION PHYSICAL LOCATION AND MOUNTING RR AT TAT TAT TR Upper shelf component wall etc 2 inch spacing Keep perforations on top cover free of minimum PA435X obstructions for max cooling effect To maximize air flow route Convection 6 single large opening in lower shelf Airflow Keep perforations on bottom plate free of obstructions Figure 5 HORIZONTAL MOUNTING When you mount the PA435X you should plan its location carefully Pay close attention to each of the following factors 1 The amplifier is convection cooled That is it depends on the natural free flow
18. obile applications or when located in seismically active areas CONNECTING THE PA435X MRC88 Preamp Ouptus or Other PREAMP OUT status ZONE IR Set MODE Switch to STEREO position PA435X Rear Panel RCA Type W Patch Cords NO S BRIDGED Be sure speakers are connected with correct polarity as shown Wall speakers shelf speakers etc Left Right Figure 6 PA435X Stereo Mode Connections When making connections to the PA435X be sure the power cord is unplugged Proceed as follows Stereo Mode Connections 1 Using good quality RCA type patch cables connect the L and R OUTPUT jacks of the MRC88 Pre Amp Output or other driving preamp to the LEFT and RIGHT input jacks on the PA435X Do this for each amplifier pair Refer to Fig 6 2 Slide the MODE switch to the STEREO position 3 Using good quality speaker wire connect the individual speaker leads to the 4 terminal SPEAKER connectors on the PA435X as shown 4 The PA435X is 4 Ohm safe in Stereo Mode Make sure the impedance presented to the speaker terminals by the speakers or any combination of speakers is 4 Ohms minimum 2003 Xantech Corporation Page 10 Model PA435X 5 Be sure to observe correct polarity by connecting the and terminal from each channel on the PA435X to the corresponding and terminals on each speaker This will ensure correct phasing see F
19. of air up through the slot perforations in the bottom plate over the internal heat dissipating fins then out the top cover for adequate cooling If mounted in an equipment cabinet or other confining location allow at least 2 inches of space above the top cover see Fig 4 Be sure there are large openings in the shelf below the unit and in the cabinet to allow the entry of cool air and the escape of warm air NOTE Do not remove feet in shelf top installations If the cabinet contains other heat generating components you will have to pay even closer attention to adequate ventilation Do not hesitate to use fans quiet boxer type if necessary to ensure a constant flow of air through the PA435X s and the other heat generating components When mounting in a 19 483mm rack adding a single RU Rack Unit above and below the PA435X will improve convection in heavy use applications One Rack Unit size 1 3 4 44 5mm in height In multi zone installations you will have large bundles of wire and cable to accommodate audio video and speaker connections Be sure to allow enough strain relief for the leads and dress them in such a manner so as not to block airflow The PA435X is designed for shelf mounting on flat horizontal surfaces When mounting into a 19 rack use an appropriate rack kit O 2003 Xantech Corporation Model PA435X Page 9 NOTE You should consider some sort of rear support for rack mounted units when used in m
20. rminals These plug in 4 terminal screw type connectors permit speaker wire sizes up to 12 gauge When making connections for the STEREO mode be sure to observe the and polarity markings just under the LEFT 8 RIGHT markings for each wire pair going to the speakers AA CAUTION When making connections for the BRIDGED mode remember only one speaker is being attached per amplifier pair Be sure to observe the outer and polarity markings on each side of the word BRIDGED on the panel above the 4 terminal connector when connecting the 2 conductor wire to the speaker Grounding Screw Provides a means for chassis connection to earth ground or to other A V products to aid in the reduction of system noise etc where needed REMOTE MASTER ON OFF and MUTE CONTROL CI1 8 CI2 These two Stereo Mini Jack connections allow each individual channel pair of the PA435X to be powered ON and OFF and muted by a control voltage ranging between 5 and 30 Volts DC 16mA 12 V When connected to the CO1 and C02 jacks from Zones 7 8 8 on the Xantech MRC88 this will allow remote Power ON OFF control directly from the MRC88 System Controller This allows the A 8 B amplifier channel pairs to be individually controlled by Zone 7 8 8 of the MRC88 Tip ON OFF Standby Control Ring Mute Control Sleeve gnd NOTE The front panel POWER switch item 3 must be left in the Manual OFF Out position and the Master AC Line Switch
21. t no sound Check line cord for good contact in a live AC outlet If REMOTE Cl jacks are being used be sure applied voltage is between 5V and 30V DC with proper polarity See Fig 8 No sound from CH2 CH4 when stereo operation is desired BRIDGED STEREO switch is incorrectly set to BRIDGED position Set to STEREO position Fig 6 See Sound cuts in and out every 3 to 5 seconds Speaker load impedance is less than 4 Ohms for Stereo mode or less than 8 Ohms for Bridged mode Make changes in speakers as necessary to obtain higher impedance PA435X does not turn OFF when both REMOTE input voltages go to 0 Volts The Logo stays illuminated Be sure that the Front Panel POWER switch item 2 Fig 2 is set to the REMOTE ON OFF OUT position PA435X becomes very warm shuts OFF but does not come back ON automatically Set POWER switch item 3 Fig 2 to MANUAL OFF OUT position for 15 seconds then back ON If REMOTE ON OFF jack is used unplug for 15 seconds then re plug One or more front panel LED s glow red The amplifier has been driven into clipping and or is overheating Correct faulty condition O 2003 Xantech Corporation Page 16 Model PA435X SPECIFICATIONS Number of channels 4 Power Output 35 Watts at 8 Ohms Rated continuous power each channel all six channels simultaneously driven 20 Hz to 20kHz at rated THD Power Output 55 W
22. talled multi zoned systems with high sonic quality It is a 4 Channel amplifier that is primarily intended to interface with the MRC88 Whole house Audio Video Entertainment System for Zones 7 and 8 Preamp outputs or for Sub Zone amplification of zones 1 6 It may also be used as a standalone single or 2 zone amplifier Specific features and technology are as follows PA435X lt axantech FOUR CHANNEL POWER AMPLIFIER Figure 1 The Model PA435X Amplifier Cost Size Efficiency The PA435X features four 35 watt power amplifiers This permits each PA435X to drive 2 zones in a multi zone system each with a 35 watt stereo amplifier per zone 4 3 2 Output Flexibility Either pair of amplifiers can be bridged to allow several channel and power output capabilities It can be configured into three power packages as follows e Four 35 watt amplifiers 4 Mono speaker outputs or 2 Stereo Zone outputs e One 70 and two 35 watt amplifiers 1 Mono 70 Watt and 1 Stereo 35 watt output e Two 70 watt amplifiers single Zone Stereo 70 watt output Remote ON OFF Control Jacks C1 C2 These 3 5mm Stereo Mini Jacks allow the PA435X to be powered on and off and muted by a positive DC voltage ranging between 4 and 30 volts 11mA 12 V Specifically when interfaced with the Control Out jacks of zones 7 8 8 on the MRC88 labeled CO1 and CO2 it permits the MRC88 to power the PA435X ON and OFF automatically with zone ON OFF commands Input Level Fl
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