Xantech PA1235 Stereo Amplifier User Manual
Contents
1. wove SR EEN EE ES ee EESE emm L SC SS ER H RARA RFR pop RRR RAR RRR 0 11 12 11 12 11 12 11 12 11 12 11 12 13 14 15 16 17 18 Fig 3 PA1235 Rear Panel Features and Functions 8 COMMON AUDIO BUS A single audio source such as from a connected preamp can drive one or more of the amplifier pairs simultaneously as desired from this Bus Any of the amplifier pairs can be switched to the COMMON AUDIO BUS at will by use of the COMMON BUS LOCAL Switch see also item 6 9 LEVEL System RESET Button Pressing this button 2 times within 1 second restores all Factory Default settings The Factory Defaults for all channels are as follows Input Level set to 1 Volt rms for 35 Watts output Balance centered Mute OFF MAX V Cleared IR Code Group set to AO Cl control in disabled Chantes Cl control to IR control of Standby ON OFF Cl enables when 5 to 30 VDC is applied to Cl for 2 or more seconds See also item 11 NOTE The PA1235 will always return to last set values p2. AM FM Tuner E OO OOOO OO O ooon ao DO ts O LI ee ek a AJ e L JR 286M Dual Blink IR a o ge Ga we Mouse Emitters 2 RCA type Patch Cords ies VT ee sesers Te pla eg EE eee E E eee eee IR Signal Cn Eh al ES SE Wi To Video Distribution if used re 601 5900 S 3 5mm to stri ey ends RS41AV Es mono ca D D 1 2 3 4 ei Audio Video VIDEO RS41AV O 5 Remote Switcher ge Si O xanteche Es EMITTERS AUDIO SYLMAR CA MADE IN U S A RS O e O LEFT A 789 44 782 6 CONNECTING BLOCK RS41AV ae COWERTSVAC V EIER Type xantech an O Power g g Power INPUT OUTP Fij Suppl O ZS ebe m O We upply qvoe OH RCVR Supply 900 White To AC MAINS striped Unswitched side To AC MAINS Unswitched PA1235 rear panel COMMON BUS COMMON BUS COMMON BUS COMMON BUS COMMON BUS COMMON BUS yantech GV GV el k Ok 0 LEFT SC RIGHT LEFT eae RIGHT AN LEFT LOCAL RIGHT LEFT ae RIGHT COMMON AUDIO LEFT LOCAL RIGHT LEFT SS RIGHT AC 120V 60 HZ BUS 5 4 AMP WARNING CAUTION STEREO WARNING re REO WARNING WE MODE MODE RISK OF ELECTRIC MODE MODE MODE SLOW BLOW howe TURN POWER E SCH sE SHOCK DO NOT OPEN L CH CR TURN POWER T RIDGED SE LEFT RIGHT TURN POWER Lg RIDGED sE OFF BEFO
3. COMMON BUS COMMON BUS 2 COMMON BUS COMMON BUS COMMON BUS COMMON BUS xanteths VG GV GV Gu GV Se LEFT LOCAL RIGH LEFT LOCAL RIGHT LEFT LOCAL RIGHT LEFT LOCAL RIGHT COMMON AUDIO LAFT LOCAL RIGHT LEFT LOCAL RIGHT AC 120V 60 HZ 1 2 e Ken BUS 5 4 AMP FUSE STEREO WARNING STEREO CAUTION STEREO WARNING STEREO STEREO WARNING 10 AMP MODE MONO ODE MONO RISK OF ELECTRIC MODE MONO MODE MONO M MONO SLOW BLOW BRIDGED TURN POWER BRIDGED SHOCK DO NOT OPEN BRIDGED TURN POWER BRIDGED LEFT RIGHT BRIDGED TURN POWER OFF BEFORE A cate OFF BEFORE KC e OFF BEFORE o CHANGING Pe fay ON Aus o mn CHANGING a YX VW o A CHANGING 5 2 ETE Ne LEVEL ss MES Q SS e e vi Q Ee REMOTE MASTER 5 2 k Le RESET o kiz o e D E Tee A o G Gw ON OFF CONTROL odo bie we 3 Hac Zen d H 1 D IT a 1 B O z D EK d E H le ih E 3 E 4 E S l E Oe fs P l 2 G O S E E f BRIDGED E BRIDGED Zr BRIDGED S BRIDGED ESCH BRIDGED BRIDGED z SPEAKER z SPEAKER SAVONS DE SPEAKER SPEAKER SPEAKER SPEAKER LEFT RIGHT E LEFT RIGHT LEFT RIGHT LEFT R LEFT RIGHT E LEFT RIGHT AC LINE Gs 4 A A ON OFF ke af FREF E 4 Gi O inti TO ROOM 5 SPEAKERS BUI 4 Ze TO ROOM 1 SPEAKERS 796 20 SIX ZONE CONNECTING BLOCK EXPA
4. NOTE Individual control of amplifier pairs is possible however through the Common IR IN provided the IR Code Group is changed on amplifier pairs you wish to control separately The STATUS output goes high and low with the AC Power ON OFF state of the entire PA1235 It does not respond to a Common IR OFF ON Standby condition 16 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 17 Master AC LINE ON OFF Switch Turns power OFF to the entire PA1235 regardless of IR Control IN or front panel POWER switch conditions Must be placed in the ON I position for the other power switching functions to work 18 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 RC68 or RC68 PROGRAMMER REMOTE CONTROL The RC68 Programmer available separately contains all the commands necessary to operate the IR control functions of the PA1235 e You will need it to program universal learning devices such as the Xantech URC 2 learning remote the Xantech Smart Pads the 590 Programmable Controller the 710 Fone Link etc with commands that operate the PA1235 e NOTE The RC68 codes operate many other Xantech models as well such as the RGC11 CC 1
5. that you can drive two pairs of 8 Ohm speakers in stereo mode in each zone PA1235 PANEL AND FEATURE DESCRIPTIONS 1 Front Panel 19 x 5 1 4 panel designed for mounting into a standard 19 Rack Panel 2 Rack Panel Handles 3 POWER Switch When pressed to the IN position power is applied to the PA1235 provided the rear panel master AC LINE ON OFF Switch item 17 is placed in the ON I position This is the MANUAL ON position When pressed again it releases to the OUT position MANUAL OFF turning the unit OFF 3 4 Fig 2 PA1235 Front Panel Features and Functions eS xantech IEN CA MN In addition this switch must be left in the MANUAL OFF OUT position to permit an external DC Control Voltage to power the PA1235 ON and OFF Refer to REMOTE MASTER ON OFF CONTROL terminals item 13 NOTE The PA1235 may also be powered ON OFF with an external AC line switch into which the power cord of the PA1235 is plugged such as the switched AC outlet of a preamp timer etc For this type of operation leave the POWER switch depressed to the MANUAL ON position 4 Status LED Indicators These indicators one for each channel pair provide the following status information a They show Power ON OFF and Standby ON OFF conditions b They flash Amber 5 times during power up then turn steady Green when Power On Mute releases On power down they flash Amber once then go off This action occurs whether th
6. 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 13 REMOTE MASTER ON OFF CONTROL This 2 terminal connector allows the entire PA1235 to be powered ON and OFF by a control voltage ranging between 5 and 30 Volts DC 16mA 12 V Be sure to observe the marked polarity For instance the 12 volt common CO Control Output of the Xantech ZPR68 preamp will power the PA1235 ON and OFF automatically with the first zone ON and last zone OFF commands The DC Voltage must be applied continuously to retain the ON condition and drop to less than 0 5 Volt to switch to the OFF condition NOTE The front panel POWER switch item 3 must be left in the Manual OFF Out position and the Master AC Line Switch item 17 set to ON 1 to permit the REMOTE MASTER ON OFF CONTROL to operate See also CAUTION notes Fig 9 14 Rear Panel ON OFF LED This LED indicates the power ON OFF condition of the entire PA1235 whether activated by a REMOTE MASTER ON OFF CONTROL voltage item 13 or from the front panel POWER switch item 3 15 Common IR IN and STATUS Connector This 4 terminal connector provides the same type of IR control functions as that of the individual amplifier pairs item 11 except they apply to all amplifier pairs in common That is IR commands for Volume Mute etc control all amplifier pairs together
7. OFF via the switched AC outlet on the rear of a preamplifier or other control center e When the preamplifier Power Switch is switched ON power is applied to the DC adapter which in turn applies 5 V to 30 VDC to the PA1235 switching it ON e Similarly when the preamplifier is switched OFF the DC voltage to the PA1235 is removed turning it OFF es xantech IEN Ca MN e CAUTION The output voltage of some adapters such as the 781RG drops off too slowly to provide a quick turnoff for the PA1235 Therefore when using any adapter 12 VDC max always connect the included 220 Ohm 1 Watt resistor in shunt with the REMOTE MASTER ON OFF CONTROL terminals as shown in Fig 9 Failure to do so may result in blowing of the power line fuse item 10 Fig 3 NOTE Do not use the 220 Ohm resistor when connecting to the CO terminals of a ZPR68 This must be the positive lead white striped lead on Xantech Power Supply Adapters COMMON BUS D Wee Preamplifier Control Center etc oe fs SEH CAUTION z 5V to 12 VDC Adapter Wl You mmut use ho incu fan fon fi such as a Xantech 781RG A plugged into a Switched PA1235 AC Outlet on Preamplifier portion of rear panel Fig 9 Using the
8. REMOTE MASTER ON OFF CONTROL Terminals A Multi Zone Power Managed System using a ZPR68 a GATEKEEP IR and a PA1235 Fig 11 shows a PA1235 in a typical multi room system with a Xantech ZPR68 10 six zone preamp and a GATEKEEP IR The PA1235 has been designed specifically to work well with both Zone and All Zone ON OFF management as rendered by the ZPR68 10 In this example the STATUS amp GND output 0 to 12 VDC of each zone of the ZPR68 10 is connected via a 2 conductor lead to the Cl amp GROUND of each amplifier pair on the PA1235 e This causes the ON OFF condition of any given ZPR68 10 Zone to turn it s corresponding amplifier pair ON OFF Standby ON OFF Also the common CO control output 0 to 12 VDC from the ZPR68 10 is used to drive the REMOTE MASTER ON OFF CONTROL terminals of the PA1235 CAUTION When making this connection do not use the included 220 Ohm resistor Refer also to CAUTION notes Fig 9 e When any one of the zones is turned ON the common CO goes high 12V turning on power to the entire PA1235 e Similarly when the last zone is turned OFF the CO drops to 0 V turning the PA1235 totally OFF NOTE No IR control of the PA1235 is used in the system shown in Fig 11 All volume mute etc functions are handled by IR control of the ZPR68 10 The PA1235 amplifier pairs are all set to the default volume level setting by pressing the LEVEL System RESET button refer to item 9 Fig 3 AC Power M
9. 2 ZPR68 etc Therefore only the button descriptions that apply to the operation of the PA1235 are listed below All others should be ignored CAUTION While the RC68 can be used as a handheld remote control it is highly recommended it not be given to the final user for the following reasons EE Pas es xantech i 5 MN gt 3 H 5 d p H 5 D D 3 H 5 d e Since it includes adjustable code groups the user may inadvertently alter the installer configurations e Also since the user will require IR commands from other brands of equipment to control the total system in addition to those of the PA1235 all commands should be consolidated into one learning device for ease of use APPLICABLE RCGS BUTTON DESCRIPTIONS 1 2 IR Emitter Lens Instant Volume Presets These commands allow ran dom access or direct preset activation of any of 12 fixed preset levels on the PA1235 This is useful when setting up audio scene ambiance levels for rooms or partial mute actions The RC68 buttons that select a fixed level attenuation below Max volume are as follows RC68 Button PA1235 Level Attenuation in dB 38 Mute ON gt 90 Min Volume 10 C amp 01 on RC68 60 00 1 52 CO 2 44 50 3 36 DO 4 30 40 5 24 AO 6 18 30 7 14 BO 8 10 20 Treble Up Arrow 6 EO Bass Up Arrow O Max Vol
10. A AAA INSTALLATION INSTRUCTIONS PA 1235 2 CHANNEL POWER AMPLIFIER POWER y 0 xantech PA1235 12 CHANNEL P OWER AMPLIFIER Fig 1 The Model PA1235 GENERAL INFORMATION To enhance the ease of installation and obtain optimum performance from the PA1235 we recommend that you first become familiar with all tts features and special capabilities by studying the descriptions and instructions in this manual The PA1235 was designed to meet the audio power amplifier needs of custom installed multi room multi zoned systems with high sonic quality Common and Local IR control of Volume Mute Balance and OFF for each channel pair is provided It s bridgeable 12 11 10 9 8 7 6 multichannel capability permits a wide variety of uses such as enough channels to run surround sound home theater and multi room applications simultaneously Specific features and technology are as follows e Cost Size Efficiency The PA1235 features 12 conservatively rated 35 watt power amplifiers This permits each PA1235 to drive 6 zones in a multi zone system each with a 35 watts channel stereo amplifier per zone The rack mountable low profile design using a large single multiple filtered power supply delivers high quality at a reasonable price IR Controlled Volume Level Volume can be ramped from zero output to maximum for individual channel pairs or as group through the Common Bus inputs using IR volume control commands from an RC68 or
11. ASTER ON OFF CONTROL terminals Be sure the resistor is connected and that the leads are making secure contact within the screw terminals of the connector Refer to CAUTION notes Fig 9 gt 3 H 5 d p H 5 D D 3 H 5 d EE Pas IEN xantech IE 15 MN SPECIFICATIONS Numberor CNS EE 12 Power Output Rated Continuous Power Each Channel 8 ORMS noice 35 Watts All 12 channels simultaneously driven 20 Hz to 20 kHz at rated THD Short Term Continuous Each Channel A gt 55 Watts 2 channels driven 1 kHz at rated THD D ei io gt 80 Watts Bridged Power Output cooooooccncccnnccccconcncnoncconononinonos 5 A gt 150 Watts Short Term Continuous one pair driven 1 kHz at rated THD Raed THD A een ae a er ese me E A A eee eee lt 0 08 Damping Factor 50 HZ 1 2 rated power coocccccccccocccccnnccononccnnnccnnonononnnnnnnnnnnnnnnnnnnnnrnnnnnnnnnnrnnnnnnnnnnrrnnnonrnnnrinnnns gt 100 S N Ratio A Weighted Shorted Inputs ref to Rated Power cccccccccccccccncccccnncnnccononononconenonononononononnnanenonons gt 100 dB Frequency Response 1 Watt 3 dB c oooocccncccnccnccnnnccccnoncnennnononancnnnnnononnnnnnonnonnnrnnnnnnnrnnnrnnnnnnnananess 12 Hz to 55 kHz Input Sensitivity Rated Power stereo mode Input Gain IR Controlled Setting VE 0 5 V DO A e A E 1 0 V Ville ee Off Input Impedance ccoccococococoooonnononononnnnanannnnnnnnnnnnnnnnnnnnnnnnnnnnos LOCAL Inputs c
12. RC68 The maximum input sensitivity at full volume is 0 15 volts for rated output 35 Watts chan Local or Common Bus Each stereo pair can be fed audio individually via their LOCAL inputs from differing zones or sources In addition a single source can be fed via the COMMON Bus to some or all stereo pairs as desired This flexibility permits the installer to drive as many as six rooms in stereo as a single zone system or six rooms in stereo as a six zone system or divide them up for a combination of both Volume Setting Capabilities The installer has the option of using the volume control of the PA1235 as the sole volume control for a zone or the system or to adjust the PA1235 volume to a desired fixed level and use the volume action of a connected preamp instead Max V Setting This allows the amplifier to be set to deliver a controlled maximum sound level into a zone when the volume is ramped to maximum This acts as a volume limiter for the system e g to prevent the kids from over driving wall speakers etc gt 3 H 5 d p H 5 D D 3 H 5 d EN xantech MI EN e 12 11 10 9 8 7 6 Output Flexibility Each of the 12 amplifiers can be driven singly or bridged to allow several channel and power output capabilities It can be configured into seven power packages as follows Twelve 35 watt amplifiers 12 total One 150 and ten 35 watt amplifiers 11 total Two 150 and eight 35 watt amplifiers 10
13. RE OFF BEFORE OFF BEFORE z w it 2 3 MODES 2 g ee C MODES 2 g B z REMOTE MASTER Si B z RESET opz H 5 565 amp ON OFF CONTROL 56 5 amp 565 amp 20 de DER Jd oi J 2 sl i d S BRIDGED BRIDGE Lei z SPEAKER Sz Toa xe SPEAKE LEFT z TO ROOM 1 TO ROOM 2 TO ROOM 3 TOROOM4 oy TO ROOM 5 TO ROOM 6 SPEAKERS SPEAKERS SPEAKERS SPEAKERS vi SPEAKERS SPEAKERS 12V IR p Parallel Connecting Block e 12 VDC P E s l NM L il EN l TE EN 2 el lg Al A HEN le kel H ER AA A ATL J l d fy as pe Ulee es x GND d gt To AC MAINS 4 Unswitch GND GER L H arte h Fe is Liza m i R L R A wl g L PR A Ne veier mm vlelsrl zm v q st ir ul 2 CC CO CO Smart CO 88 Smart Os ss Smart 0 Os Es lPad Tv Ss Es IPad TM 55 55 Pad O OO 55 Es IPad i CG Es Pad 5 Es Pad 4 z an a 4 i h L H R o vial st ir L R L OR 780 80 780 80 780 80 Je Box El J Box RS J Box El IR Receiver 4 IR Receiver U4 IR Receiver UI _ROOM 4 Fig 8 Basic PA1235 RS41 System Requires Room Dedicated Remotes D PA1235 xantech 11 8 Tok
14. ZONE EMITTERS l O O O ZONE 4 A B TO ROOM 2 SPEAKERS TO ROOM 3 SPEAKERS TO ROOM 4 SPEAKERS TO ROOM 6 SPEAKERS a D D D D D D D D D D D D D D D m D D D D D D D D D D D X NLLETH SYLMAR CA MADE IN U S A RS ZONE IR INPUTS ZONE9 ZONE8 ZONE7 COMMON 12 N G 12 N G 12 N G 12 OUT G ZONE IR INPUTS ZONE6 ZONE5 ZONE4 12 N G 12 N G 12 N G aar ZONE EMITT O O ZONE 7 ZONE 8 A B A B O ZONE 9 A B ZONE 5 ZONE 6 A B O To AC MAINS Unswitched GND AO OS AS LLL ELLO LET A LO OO O O OO CO TA gt D 12 VDC a D AO AO CEL O A AS G ST T Ss Smart Pad QO0000 QUOUUU Ls LU QUU D D D L R L R vlal sr d O H Di H 780 80 Te 780 80 780 80 j Box E mJ Box D el Box El IR Receiver 4 IR Receiver UD IR Receiver 4 ROOM 2 Fig 10 Basic PA1235 RS41 796 20 System Uses Non Dedicated Room Remotes PA1235 MM D i xantech TROUBLE SHOOTING lf you encounter a problem please review the items below Be sure in addition to check other system components such as preamplifiers CD players speakers speaker wiring etc that may be at fault 1 Front Panel LEDs do not light no sound e Check line cord for good contact in a live AC outlet e Ifthe REMOTE MASTER ON OFF CONTROL terminals item 12 Fig 3 are used be sure applied volta
15. anagement of the entire system as shown in Fig 11 is accomplished therefore as follows a The PA1235 is controlled via the STATUS and CO functions as noted above b The Source Components are controlled via the GATEKEEP IR sensor system and the IR macros in the Smart Pads and where used IR macros in Learning Remotes such as the Xantech URC types gt 3 H 5 d p H 5 D D 3 H 5 d EE Pas IEN xantech IEN 13 MN CONTROLLED SOURCE COMPONENTS Cassette DecK AM FM Tuner Satellite Receiver OO BE os 2 O L R L R v LI JR L R 286M Dual Blink IR gn a a a Mouse Emitters 2 CD Changer 0 0000 RCA type Patch Cords a Ge 0 IR Signal DUTOT rel SEN Bees SIE SC To Video Distribution if used A Rova Il Ohahahe o d udio Video VIDEO RS41AV E Remote Switcher O pees ee CONFIRM O xantech e MX emitters AUDIO SYLMAR CA MADE IN U S A O Ce O SE S 782 CONNECTING BLOCK AUDIO y xantech N RS41 AV POWER 15VAC_V_V G IRIN A Power RIGHT Power INPUT OUTP Er Supply Ji 12VDC Supply 200 12 VDC r White To AC MAINS striped Unswitched side To AC MAINS 6015900 Unswitched 3 5mm EE PA1235 rear panel mono cable 7
16. connector on the CB18 connection to any of the other connectors would also work amp run to the Common IR IN on the PA1235 with a 2 conductor lead Refer to Fig 8 5 Toprovide common IR control to the RS41AV and the Source Components and to power the keypads and IR receivers three leads are connected between the CB18 and a 789 44 Connecting Block 6 Since acommon IR bus is used to keep costs low each of the amplifier pairs on the PA1235 must be set to a different IR Code Group number so that Volume Mute Balance and Standby ON OFF in each room can be adjusted independent of the others To make Code Group changes refer to the RC68 Programmer Instructions NOTE When shipped from the factory all amplifier pairs of the PA1235 are set to Code Group number AO You may for example leave the 1 amplifier pair at AO and change the other five to BO CO DO etc Just be sure not to use a group number that is used by any other Xantech product connected on the same IR bus e g 20 used on the RS41AV CAUTION When changing the group numbers you must connect an IR receiver to each amplifier pair s IR input item 11 Fig 3 one at a time You cannot use the Common IR Input item 15 Fig 3 as this will change them all to a different but same number 7 After the Code Groups are set up teach volume and other commands from the RC68 Programmer Fig 4 into learning remote controls and the keypads dedicated to each room Be sure to set t
17. ds 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 Ifthe positive and negative terminals on your speakers are correctly marked and visible and you have wired the system as shown in Figs 6 and 7 then the system willbe 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 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 ei
18. e unit is powered ON and OFF by the POWER switch item 3 or by a DC voltage applied to the REMOTE MASTER ON OFF CONTROL terminals item 13 Be sure the rear panel master AC LINE ON OFF Switch item 17 is set to the ON I position for the above to occur c They will go Off when the Standby OFF IR command is received Sending a MUTE OFF command will restore operation Also LEDs blink with Volume action d A Mute command will cause them to blink Green Red if Volume is within 5 dB of Max V Mute is released when any other PA1235 command is sent e Changing an IR Code Group will cause them to blink Amber confirming the change has taken effect f When the volume level is increased to a range within 5 dB of MAX V the LED color changes from Green to Red NOTE Red indicates that volume is approaching maximum not an indication of power output level 5 Line Inputs These RCA type jacks are the audio inputs for each of the amplifier pairs Connect them to the OUTPUT jacks of the driving preamp with good quality RCA type patch cables Note that the inputs are marked LEFT 1 RIGHT LEFT 2 RIGHT etc signifying the stereo channel pairs Both the LEFT and RIGHT jacks are also active when the MODE switch item 7 is set to the MONO or BRIDGED mode 6 COMMON BUS LOCAL Switch Switches the amplifier stereo pair inputs between the LOCAL LEFT RIGHT jacks item 5 and the COMMON AUDIO BUS LEFT RIGHT jacks item 8 In this way each a
19. eep the system cost low no AC power management is included The user would need to operate the power switching for each component individually using front panel power switches or IR as appropriate Individual room Standby ON OFF is provided however The STATUS of Standby ON OFF is indicated at the IR receivers and keypads via the STATUS line connection to each room as shown 9 This system is primarily set up to distribute music to each room A video feed to a single room could also be done at low cost However video distribution to all rooms would add additional layers of complexity and cost that would best be handled by a ZPR68 10 in a system similar to that shown in Fig 11 10 When connecting speakers for each room be sure to observe correct polarities as shown in Fig 6 A Basic Dedicated IR System Non Dedicated Keypads and Remotes A typical system of this type is shown in Fig 10 where each remote room has a Dedicated IR path going to the PA1235 amplifier pair that controls it The IR bus is not connected in common as it is in Fig 8 It eliminates the need for dedicated remotes allowing you to carry the same remote s from room to room that is remote commands for Volume Mute etc will work in any room from the same remote This system is similar in many respects to the previous system Fig 8 but differs as follows 1 A 796 20 Six Zone Connecting Block is used to Zone individual IR control signals to each amplifier pai
20. ge is between 5 V and 30 VDC with proper polarity Refer to Fig 9 2 Low level or no sound when operated without IR control e Level was previously set by IR to a low level or muted Simply press LEVEL System RESET button as instructed in item 9 Fig 3 3 Sound cuts in and out every 3 to 5 seconds e Speaker load impedance is less than 4 Ohms for Stereo mode or less than 8 Ohms for Bridged mode Make changes in matching auto formers and or speakers as necessary to obtain higher impedance 4 PA1235 does not turn OFF when REMOTE input voltage goes to 0 Volts e Be sure that the POWER switch item 3 Fig 2 is set to the MANUAL OFF Out position 5 PA1235 becomes very warm shuts OFF but does not come back ON automatically e Set POWER switch item 3 Fig 2 to MANUAL OFF OUT position for 15 seconds then back ON If the REMOTE MASTER ON OFF CONTROL terminals are used unplug for 15 seconds then re plug 6 Unit responds intermittently or not at all to IR commands e Look for IR noise at the IR receiver locations in the various rooms Also long lengths of shielded wire from keypads or IR receivers can cause poor IR executions Refer to the troubleshooting sections of the IR receiver and keypad manuals you are using 7 The PA1235 blew its fuse item 10 Fig 3 as power was turned OFF using an adapter driving the REMOTE MASTER ON OFF CONTROL terminals e The supplied 220 Ohm resistor may not have been connected in shunt with the REMOTE M
21. he RC68 to the specific Code Group Number that corresponds to the ones chosen for each of the amplifier pairs during this teaching process NOTE With a Common IR Bus system you cannot carry the same remote control from room to room You must use a dedicated learning remote such as the Xantech URC versions foreach room into which you have taught the specific RC68 Code Group that operates the specific PA1235 Amplifier Pair that controls the volume etc for that room If you wish to carry remotes that have the same codes from room to room use a Dedicated IR System as shown in Fig 10 eS ANEECH P2s MN CONTROLLED SOURCE COMPONENTS Cassette Dech CD Changer RIGHT R ER Raga H Satellite Receiver BRIDGED SPEAKER LEFT RIGHT EE RES A l BRIDGED BRIDGED SPEAKER SPEAKER LEFT RIGHT BEE RIGHT A a eS s A AN eee ee AC LINE ON OFF
22. i zone system 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 PA1235 s and the other heat generating components When mounting in a 19 483mm rack adding a single RU Rack Unit above and below the PA1235 will improve convection in heavy use applications One Rack Unit size 1 3 4 44 5mm in height The PA1235 will operate when mounted either horizontally or une 8 Senos EE vertically Horizontal placement is preferred however since it will run approximately 5 to 10 cooler when so oriented j j i i L RCA Type In multi zone installations you will have large bundles of wire Patch Cords and cable to accommodate audio video and speaker connec GER tions Be sure to allow enough room for the leads and dress R them in such a manner so as not to block airflow The PA1235 is designed for mounting into standard 19 Rack Panels or on flat horizontal surfaces When mounting into a Set MODE 19 rack use the rack panel cup washers and screws supplied E STEREO position NOTE You should consider some sort of rear support for rack i e f COMMON BUS PA1235 mounted units when used in mobile applications or when Rear Panel located in seismically active areas LEFT LOCAL RIGHT TURN POWER OFF BEFORE CHANGING MODES GROUN STATUS IR IN O Using good quality RCA type patch cables co
23. ier pair in the BRIDGED mode 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 TYPICAL APPLICATIONS Since the PA1235 has an IR control system for each amplifier pair it can be configured so that each individual room ina multi room system can have Line Level Volume Mute Balance and Standby ON OFF action via IR or Smart Pad control This eliminates the need for speaker level volume controls and their attendant power losses and reduced sound quality A Basic Common IR Bus System Dedicated Keypads and Remotes A typical system using a low cost approach is shown in Fig 8 It does require that a dedicated remote be used in each room that has an IR receiver that is remote commands for Volume etc are specific for each room The system is configured as follows 1 An RS41AV is used as a low cost 4 source selector an ideal solution when only a few sources are desired 2 Both IR receivers and keypads are used for system control from designated rooms 3 ACB18is used as aconvenient parallel connecting block for the common 12 VDC IR signal and GND bus wiring for all the home runs from the keypads and IR receivers in the remote rooms 4 TheCommon IRis taken from the 6
24. lus any unaltered factory defaults after main power shut down or after any power interruptions 10 FUSE When required replace only with a fuse of the same type and rating 120 V Version 10 AMP 220 VAC SLOW BLOW 240 V Version 5 A Time Lag 250 VAC Replacement with a fuse of higher rating will not protect the amplifier and will void the warranty 11 IRIN STATUS GROUND and Cl Terminals Removable 4 Terminal screw type plug in connector IR IN IR Signal Receives IR Input from Xantech IR Receivers Smart Pads Connecting Blocks etc STATUS Out Delivers a constant 12 VDC output 9V Y 70 mA with ON condition O Volts output OFF Standby GROUND Ground for IR IN STATUS out amp Cl in Cl Control Input Use for control of Standby ON OFF of amplifier pairs if desired instead of by IR After Cl is enabled see item 9 O Volts input OFF Standby condition and 5 to 30 VDC input ON condition 12V in draws 16 mA NOTE All plug in connectors accept wire sizes from 24 to 12 gauge E o A xantech IEN Ca MN 12 SPEAKER Terminals 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 amp RIGHT markings for each wire pair going to the speakers CAUTION When making connections for the BRIDGED mode remember only one speaker is being attached per amplifier pair
25. mplifier pair can be driven by separate zones or sources or from a common source via the COMMON AUDIO BUS 7 MODE Switch Switches the amplifier pair between STEREO MONO and BRIDGED modes In STEREO mode the two amplifiers operate independently of each other for 35 Watts of output each except IR control of Volume Max V Mute Standby OFF ON and Balance functions is common to both In MONO mode left and right input signals are summed internally for Mono output from each of the two amplifiers Also either the Left or Right item 5 input may be used if the source is already a Mono signal In BRIDGED mode the two amplifiers are bridged for a single channel of high power output 150 Watts 8 Ohms Either the Left or Right input item 5 may be used to drive the resultant single channel amplifier CAUTION Be sure to have the POWER turned OFF when changing the position of this switch and when making the corresponding speaker connection changes see also item 12 following gt 3 H 5 d p H 5 D D 3 H 5 d MA IEN xantech IEN o MN COMM N BUS COMM N BUS COMM N BUS COMM N BUS COMM N BUS COMM GN BUS xantethe o e Ke ES LOCAL RIGHT LEFT LOCAL RIGHT LEFT LOCAL RIGH LEFT LOCAL RIGHT LEFT LOCAL RIGHT LEFT COMMON APDIO
26. nnect the L and R OUTPUT jacks of the driving preamp to the LEFT and RIGHT input jacks on the PA1235 Do this for each amplifier pair Refer to Fig 6 oe SPEAKER Slide the MODE switch to the STEREO position i LEFT RIGHT Using good quality speaker wire connectthe individual speaker leads to the 4 terminal SPEAKER connectors on the PA1235 as shown The PA1235 is 4 Ohm safe in Stereo Mode Make sure the impedance presented to the speaker terminals by the speak SE aa ers or any combination of speakers is 4 Ohms minimum polarity as shown Be sure to observe correct polarity by connecting the and Ye A terminal from each channel on the PA1235 to the corre 4 ti sponding and terminals on each speaker This will ensure correct phasing See Fig 6 and Speaker Phasing Wall speakers following shelf speakers etc Since the connectors are removable you may unplug them for ease of lead assembly Left Right Fig 6 STEREO Mode Connections S C Oeh PA1235 MN 6 Asarule ofthumb use 18 gauge speaker wire for speaker runs up to 30 9m 16 gauge upto 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 stran
27. ocation 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 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 H Upper shelf component wall etc 2 inch spacing Keep perforations on top cover free of minimum PA1235 obstructions for max cooling effect ef gt 3 H 5 d p H 5 D D 3 H 5 d DN NN A A A A A A AE AE A A AE AE E ZS AAA AA AE E AA AE A A AE Ai CAE MEA AE A AE AE A ME AE AE A E AE E ATTE AAA AE AE AAA EEE ETT NAAA AAA A A A A A AE A A A AE AE Ai To maximize air flow route Convection Keep perforations on bottom single large opening in lower shelf Airflow plate free of obstructions Fig 5 Horizontal Mounting PAS ME ANTEC A MN CONNECTING THE PA1235 l When making connections to the PA1235 be sure the power cord is vone s wong y WARNING unplugged Proceed as follows A Stereo Mode Connections 1 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 lf the cabinet contains other heat generating components or you are using several PA1235 s in a large mult
28. ooooccnnnnncncccconicnnnnnnnnnnncnnnnnonnnnonnnnnos 22 kOhms COMMON AUDIO BUS Inputs ooooocccnccnnnc 70kOhms Power A asics neioentnieiceacaneseee ented oan eaten 120 VAC 60 Hz 240 V Version 240 VAC 50 Hz Power Consumption cccccccccnccccccccccnnncncnnnnnnnnnnnnnnnnnnnnnnnnnnnnos NO Signal ccscedeciencceeccdredccnsesionicceee 30 Watts 0 25 0 13 A 12 chan O 1 10 rated power 360 Watts 3 0 1 5 A 12 chan O rated power a se 1090 Watts 9 1 4 6 A 6 chan Bridged 8 5 watts chan 720 Watts 6 0 3 0 A Remote ON OFF and Cl Voltage Current cccccccccccccceeeeeeeeeeeeeeeneeeeeaeesaaeeenens 5 V to 30 VDC 16 mA 12 VDC Default IR Code Group all amplifier pairs ooccoonnononncnccnnnncccnnonnnoncnccnnnnnnononnnnnnncncnnnnnnnnonnnnnnnnrrnnnnrnrnnnnnannnnrininns AO Line Fuse Rating 000nnnna00aannn 120 V Version 10 A Slow Blow 220 VAC 240 V Version 5 A Time Lag 250 VAC DIMENSIONS eege 19 483mm W x 5 1 4 183mm H x 15 5 394mm D E no e EE 35 75 lbs 16 3kg 3 9 01 Rev C ee antech MA Ca MN
29. or status NOTE In addition to MUTE OFF the muted condition can be released with VOLume item 8 Preset Level item 2 and Balance items 4 amp 5 commands 8 VOLume Up Down Commands When pressed in individual steps volume increase and decrease Is 2 dB per step over a range of 0 dB Max to 60 dB The next step below 60 dB is OFF gt 90 dB When pressed continuously volume level will change ramp continuously in 1 dB steps See also MAX V settings item 6 NOTE Volume action of the PA1235 has been designed specifically to ramp more quickly in the DOWN direction and more slowly in the UP direction 9 Code Group Numbers The PA1235 is capable of being set to 55 different code groups both individually as amplifier pairs and collectively as a group NOTE As shipped from the factory all amplifier pairs in the PA1235 are set to code group number AO Be sure to set the RC68 to the same number lt may be necessary to change the PA1235 amplifier pairs to different code groups if you wish to address each pair individually from the COMMON IR BUS item 15 Fig 3 or an external common IR bus network when using other Xantech PA1235 s in large systems to avoid mutual interaction Refer to the RC68 instructions for code group setting procedures 10 ADJ OFF Command This command unlocks a previous MAX V setting See also item 6 INSTALLATION PHYSICAL LOCATION AND MOUNTING When you mount the PA1235 you should plan its l
30. r of the PA1235 for Volume Mute Balance and Standby ON OFF action in each room It also carries a COMMON IR signal to a 789 44 Connecting Block for control of the RS41AV Remote Switcher and the Source Components 2 Note thatthe ZONE numbers on the 796 20 do not agree with the room or amplifier pair numbers This is of no consequence itis only necessary that each room s keypad or IR receiver connects to a different ZONE IR INPUT on the 796 20 3 Since the 796 20 channels the IR from each room to it s specific PA1235 amplifier pair each amplifier pair can use the same IR Code Group the factory default AO 4 While use of the 796 20 entails some added expense it reduces programming time for both the hand held remotes and the keypads in addition to providing additional convenience to the user 5 The desired volume and other commands from the RC68 Programmer see Fig 4 need to be taught into learning remote controls Such as the Xantech URC types and Smart Pads used in the system either directly or by using Dragon Drop IR Connecting the REMOTE MASTER ON OFF CONTROL Terminals As mentioned under PA1235 PANEL AND FEATURE DESCRIPTIONS the REMOTE MASTER ON OFF CONTROL terminals allow the power to the entire PA1235 to be turned ON and OFF by aremotely applied DC Voltage Figs 9 and 11 are typical applications using this feature Using a DC Power Adapter as a Control Voltage Fig 10 illustrates how a PA1235 can be switched ON and
31. ther the LEFT or the RIGHT input jacks of the bridged pair as shown in Fig 7 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 for 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 PA1235 and the speak ers as shown in Fig 7 Be sure to use only the two outer terminals marked and on the 4 terminal connector as shown on the panel for BRIDGED con nections ME PA23 M xontech Preamp Outputs ZPR68 etc RCA Type Patch Cords Set MODE Switches to PA1235 BRIDGED position Rear Panel COMMON BUS AM Gei 5 LEFT LOCAL RIGHT L o o Y COMMON BUS AV Gei LEFT LOCAL RIGHT L 1 2 L STEREO WARNING STEREO MODE MONO MODE MONO BRIDGED TURN POWER BRIDGED OFF BEFORE a CHANGING a US MODES GROUN STATUS IR IN GROUN STAT IR IN O BRIDGED SPEAKER LEFT RIGHT SPEAKER i BRIDGED LEFT Be sure speakers are connected with correct Ye polarity as shown N Left Right Fig 7 BRIDGED Mode Connections gt 3 H 5 d p H 5 D D 3 H 5 d NOTE Only one speaker is connected per amplif
32. total Three 150 and six 35 watt amplifiers 9 total Four 150 and four 35 watt amplifiers 8 total Five 150 and two 35 watt amplifiers 7 total Six 150 Watt amplifiers 6 total This gives the PA1235 great flexibility for use in many applications such as driving surround sound speaker systems in addition to multi room Individual ON OFF of Amp Pairs Permits Standby ON OFF control of individual channel pairs Specifically it permits the STATUS outputs 12 Volts On Off of Xantech ZPR68 zones to switch the Standby of the PA1235 channel pairs Cl On and Off with zone ON and OFF commands Remote Master ON OFF Allows the entire PA1235 to be powered ON and OFF by a positive DC voltage ranging between 5 and 30 volts 16mA 12V Specifically it permits the 12 Volt common CO Control Output on the Xantech ZPR68 to power one or more PA1235 s ON and OFF automatically with first zone ON and last zone OFF commands Default settings As received from the factory Volume level is setto 1 Volt for 35 Watts output Balance is centered and Mute is OFF for all channels Also pressing the LEVEL System RESET switch 2 times within 1 second restores all factory defaults The PA1235 will always return to last set values volume etc after main power shut down or after any power interruptions 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
33. ume OFF Command Turns the amplifier pairs both LOCAL and COMMON to Standby OFF mode The Standby OFF mode remains until the MUTE OFF command is sent NOTE This command is inhibited automatically when the Cl terminal is driven high with an external control voltage Refer also to items 9 and 11 Fig 3 xantech RC68 PROGRAMMER Fig 4 The RC68 Programmer C BAL Command Instantly returns the balance to the Center position equal volume in each channel from any previous setting Balance Commands When the Balance arrow buttons are pressed the audio output will move to the left or right with a 2 dB step reduction in the attenuated channel with each left or right press NOTE These commands do not ramp That is no change will occur if the BALANCE buttons are held down continuously MAX V This command saves a maximum desired volume level for a zone or rooms both LOCAL and COMMON The volume is first adjusted to what is desired as a maximum level The MAX V button is then pressed locking in this setting This acts as a volume limiter for the system e g to prevent the kids from over driving wall speakers etc To unlock the MAX V setting press the ADJ OFF button item 10 Cs antech A CA MN 7 MUTE ON OFF Separate ON OFF Mute commands give positive mute action without knowing the actual mute status This is very helpful in a remote room where commands are sent blind without any visual aids f
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