Emotiva XPA-1 User's Manual
Contents
1. Hum Noises in the Speakers This problem is more than likely caused by a ground loop in your system rather than a fault in the XPA 1 Follow these steps to isolate the main cause of the hum there may even be more than one e Remember to turn off all components in your system including the amplifier before disconnecting or connecting any cables during troubleshooting e Try to have all of your equipment on the same electrical outlet or circuit Group all the low power components preamp CD player DVD etc on a single outlet or power strip This is provided that the overall current draw from your equipment does not exceed the rating of the outlet or breaker e Disconnect all cables which come from outside the room and check if the hum goes away This includes such connections as cable TV satellite TV or roof top antennas Make sure that they are disconnected where they first enter the room so they are making no connection to the preamplifier or the TV or any other component If the hum is caused by the cable TV line then you will need a ground loop isolator This is an inexpensive device fitted in line with the coaxial cable feed Contact your cable company or your Emotiva Dealer for assistance e Disconnect all connections from the preamplifier to your TV VCR or DVD e As a test disconnect any other component which has a grounded power cord NOTE Never remove the ground pin from any power cords if present This is2. connection between two speakers CMICTIVA USER N e The negative output terminal of the right channel connects to the negative input post of the first speaker and to the negative post of the second speaker The total impedance of equal speakers in parallel is found by dividing the impedance of one speaker by the number of speakers For example two eight ohm speakers in parallel is a four ohm load eight ohms divided by two four eight ohm speakers in parallel is a two ohm load eight ohms divided by four Two ohm single channel loads are NOT RECOMMENDED for the XPA 1 Running the XPA 1 below recommended impedance level can cause excessive heat and will eventually drive the amplifier into protection blinking red LED s on the front of the unit Parallel connections are harder on the amplifier than series connections as the total impedance is lower compared to driving a single speaker and the amplifier must produce more current to drive them Ideally the total average impedance should be no less than 4 ohms per channel You must make sure that the lower impedance does not cause the amplifier to overheat shut down blow the line fuse or trip your circuit breaker If this happens you should reduce the number of speakers wired in parallel rewire them in series or use more than one power amplifier Technical Note about Multiple Speaker Connections Although there are two possible connection types discussed in this manual
3. 13 13 14 15 15 15 15 16 16 17 17 17 18 19 19 19 CMOLVA vu s 5 7 Safety Precautions Read this User s Guide thoroughly before attempting to install and configure the Emotiva XPA 1 Amplifier All the safety and operation instructions should be read before any operation of the component s begin After successful installation and configuration of the Emotiva XPA 1 Amplifier be sure to retain this manual in a safe place for any future reference needs All warnings on the Emotiva XPA 1 Amplifier and in these operating instructions should be followed Safety is a key component to a long lasting and trouble free installation The vast majority of the subsequent safety precautions involve simple common sense If you are not comfortable with the installation of audio video entertainment equipment it will be to your benefit to seek the services of a qualified installation professional NEVER use the XPA 1 Amplifier near water such as a bathtub washbowl kitchen sink laundry tub in a wet basement or near a swimming pool etc There is a risk of electric shock to your body and permanent damage to the equipment Electric shock may result in permanent bodily injury or death The Emotiva XPA 1 Amplifier should be situated so that its location or installation position does not interfere with proper ventilation The Emotiva XPA 1 Amplifier should not be situated on a bed sofa rug or similar surface that may bloc
4. WHERE PASSION AND HOME THEATRE MERGE x lt FPFI 2 POWER AMPLIFER USER S GUIDE Table of Contents Safety Precautions NEC National Electrical Code Standards A Note for the Cable Television CATV Installer Antenna Grounding Outside the House Thank You for your XPA 1 Purchase Unpacking the XPA 1 Inventory Recording the Serial Number Emotiva XPA 1 Reference Differential Amplifier Professional 500 Watt Amplifier Features Front Panel Layout Rear Panel Layout Installation and Connections AC Power Considerations Physical Placement Input Connection Considerations Output Connection Considerations Connection Tips for Superior Sound Connection Diagrams 12V Trigger Connections Speaker Output Connections Series and Parallel Speaker Connections O O COMO CONN N Oaoan WwW aAa a Na a 12 Series Parallel Technical Note about Multiple Speaker Connections Troubleshooting Guide No Sound from one or more speakers connected to the XPA 1 The amplifier shuts down often or the line circuit breaker trips often Poor Bass Performance From Full Range Speakers connected to the XPA 1 Turn on and turn off thumps Hum Noises in the Speakers Other Probable Causes of Noise One or more RED lights on the Front Panel are Blinking Problems with the whole A V System XPA 1 Technical Specifications Limited Warranty Service Assistance for the XPA 1 Emotiva Disclosure
5. and record it below Also record the place where you purchased this product and the date of purchase Model Number Serial Number Place of Purchase Date of Purchase EMOTIVA CIU USER SI Emotiva XPA 1 Reference Differential Amplifier Professional 500 Watt Amplifier Features e Audiophile Quality Differential Amplifier e 500 Watt RMS Mono Block Amplification e Low noise 1 2 KVA toroidal power transformer e Complementary discrete power amplifier design incorporating high current high speed ON semiconductor power devices e Channel status indicators for standby operate and fault e Completely stable into 4 ohm loads e Signal to Noise Ratio is greater than 100dB unweighted reference full output e THD 03 at rated power 20Hz 20kHz e Fully protected from all fault conditions e Soft start circuitry e External trigger turn on e Soft touch power switch e 4RU chassis w solid milled aluminum faceplate e IEC power inlet 115 230 VAC Auto configurable Front Panel Layout Front Panel LED Display The front panel display contains Status LED lighting to indicate the condition of the XPA 1 NO LED Amplifier is OFF BLUE LED Normal Operation FLASHING RED LED Fault Condition EMOTIVA See Troubleshooting section for details Front Panel Power Switch This switch provides the ON OFF control of the XPA 1 from the front panel When the unit is off and in standby mode the swit
6. banana connectors Spade connections or banana plugs ensure a simple solid fit in the terminal whereas bare wire may be awkward when the terminal is screwed down to compress the wire into place Keep in mind that if you use dual banana plugs and stack them you will be creating a parallel connection and this amplifier is not rated to play below 4 Ohms per channel WE EMONVA USER SYGYg Series and Parallel Speaker Connections Whenever connecting more than one speaker per channel to an amplifier regardless of the brand you must consider the way in which the amplifier will be impacted by adding the additional speaker s Additionally speakers with dual voice coils also apply to this consideration Two voice coils in a single speaker also cause different reactions from an amplifier depending on the way in which they connect to the amplifier The connection of more than one speaker per channel will tend to degrade the speaker s frequency response and may make the amplifier run hot For the best sonic results use one speaker per amplifier channel If you must connect more than one speaker per channel there are two methods in which to do so Series or Parallel Series string end to end so there s only one way for audio signals to flow in and only one way for audio signals to flow out For example if you were to series connect two speakers to the front right channel of the amplifier A se
7. it is imperative that with either connection type that you use loudspeakers of the same type and nominal impedance for these connections In doing so you have the most predictable outcome for your installation When speakers of different nominal impedances and or different bandwidths are used there are many other acoustic problems that come into play in addition to complex impedance at the amplifier s speaker output terminals If you must use multiple speakers on any individual amplifier channel please use speakers as close to identical as possible WUMMMM EMONHNVA U SERI SAMM AUU Troubleshooting Guide The Emotiva XPA 1 is expertly designed and built to provide years of trouble free performance Most problems that occur can usually be solved by checking your setup or making sure that the audio and video components connected to the amplifier are on and fully operational The following information will help you deal with common setup problems you may experience during normal use of your unit If problems persist contact Emotiva for help No Sound from one or more speakers connected to the XPA 1 e Speaker cables may have come undone Turn off your system and check the cables and tighten the amplifier and speaker binding posts e Damaged audio cable e The preamplifier volume level is low for the channels concerned Recheck the preamplifier calibration procedure e A preamplifier Mute switch may be on or an external proce
8. ays in which the speaker wire can connect into the posts The posts can accept bare wire spade terminals and dual or single banana connectors Spade connections or banana plugs ensure a simple solid fit in the terminal whereas bare wire may be awkward when the terminal is screwed down to compress the wire into place Keep in mind that if you use dual banana plugs and stack them you will be creating a parallel connection For more details on series and parallel connections see pages 13 14 It is important to observe polarity so that the speaker wire connects to the red and black terminals on the amplifier and the corresponding terminals at the speaker Also make sure that the positive speaker wires do not touch the negative speaker wires or any chassis metal This will cause a short circuit and activate the protection circuitry Connection Tips for Superior Sound Before setting up your new system please consider the following e Always make sure the XPA 1 is turned off before making or changing ANY connections e Whenever possible route the power cords away from the signal cables or speaker wires to prevent any hum or interference heard in the speakers e Many RCA type patch cords can be a very tight fit and there is usually a preferred method of getting them off Some have to be removed with a twisting action Be gentle or you may damage the jacks of your XPA 1 the cables themselves or other components e Many audiophile si
9. ch illuminates amber Automatic switching is accomplished with the 3 5mm trigger input on the back panel using a 5 12VDC control signal Rubber Feet These rubber feet keep the XPA 1 elevated for bottom ventilation as well as for vibration isolation SSS s Rear Panel Layout Remote Turn On Jack This 3 5mm jack accepts a 5 12 volt input for remote activation of the XPA 1 This mates directly with the Emotiva processor trigger out If building your own cable center is positive and outer shield is negative US E R S Yj GUID RCA and XLR Audio Inputs These inputs are for signal input on the XPA 1 Simply connect the appropriate input to your preamplifier processor or other preamp level audio device Power Receptacle This is a standard IEC 2 prong power receptacle It is advised that this amplifier have a direct connection to a wall outlet Do not plug into a power strip A A D F 10 SHOCK HAZARO 00 NOT OPEN ans Differentir A Referonce RISK OF ELEC TUG SHOCK RISQUE DE CHOC ELECTRIQUE i THSVOHI 1500 Watts Max NE PAS OUVIR Emotve Olerertiat Reterence and te C are Vadenarts of Emotive Avdo Corporaton ARIE A 8 Potentially lethal voitages present during operation A e es 28 POMIR POMIR L Master Power Switch This rocker switch provides the master power for the XPA 1 After it is in the ON position the amplifier can be turned on ma
10. e on the AC or DC lines The power transformers may turn this interference into an audible noise Internal hum can be made worse by a shelf or cabinet resonating so try moving the XPA 1 to another shelf e Try moving your components further away from the TV especially if you ever notice the screen has changed color in the area closest to the component e If you have very high efficiency speakers these may tend to reveal noises which other speakers do not One or more RED lights on the Front Panel are Blinking Each RED light indicates a fault condition for the corresponding power module A fault condition is one or more of the following e Excessive Operating Temperature e Excessive Current Short Circuit e DC on the Outputs An excessive temperature fault can be reset by allowing amplifier to cool and cycling power on off button on the front panel Excessive current short circuit can be reset by removing the cause of the short and cycling power on off button on the front panel DC at output is a possible fault condition that is equipment related and requires technical assistance Please contact Emotiva if you have repeated problems causing the RED front panel light to flash that are NOT thermal or short circuit related Problems with the whole A V System If you are having more complex problems in your overall home entertainment system not just with the XPA 1 amplifier please contact Emotiva for XPA 1 professional installation assista
11. gnal cables are intended to be hooked up in one direction If this is the case the cables will be marked with arrows the direction of signal flow e It is usual for the right channel RCA patch cord plugs to be red and the left channel connections to be white grey or black depending on the cable brand RCA connectors that are gold will be designated with a colored band to designate the channel UMMM Connection Diagrams 12V Trigger Connections The 12 VDC trigger connection shown can be used to turn the amplifier on when the preamplifier turns on This trigger will actually trigger with any switched DC Voltage from 5 12 VDC however the majority of home theater components use a standard 12 VDC trigger connection for this function This is the preferred connection as it has the greatest degree of reliability Never switch anything that plugs directly into the wall with this trigger connection This action will damage the unit and VOID THE WARRANTY Speaker Output Connections There are two groups of speaker terminals and each group is connected in parallel Which is to say that the two terminals on the Positive are in parallel and the two terminals on the Negative are in parallel EMICTIVA USER SY WY Regardless of the configuration used for the XPA 1 amplifier channels proper connection of each speaker is essential The 5 way binding posts can accept bare wire spade terminals and dual or single
12. he most discriminating tastes The Emotiva XPA 1 features an array of leading edge technologies and all the features necessary to perform the functions expected of a high end power amplifier The Emotiva XPA 1 power amplifier is a rock solid component At Emotiva we remember that creating home audio video products means that they should be easy to use while delivering unparalleled performance EMOTNA u SER SONNE Unpacking the XPA 1 The Emotiva XPA 1 Amplifier should reach you in flawless condition If you notice any shipping damage or other issues upon unpacking the unit please contact your Emotiva Retailer immediately Inventory Included with your XPA 1 amplifier should be an IEC Class 1 2 prong power cord and this User s Guide Please take a moment to make sure all the items are there in the packaging Gently lift out the unit and remove all the packing material and accessories This amplifier is heavy so please unpack it carefully to avoid unnecessary injury or damage to the amplifier It is important to save all the packing materials and the box in case your Emotiva XPA 1 ever needs to be moved or shipped back to the factory for service Make sure that you keep your sales receipt It is the only way for Emotiva to establish the duration of your Limited Warranty and it may come in useful for insurance purposes Recording the Serial Number Please read the serial number located on the rear panel and front panel
13. he rear panel or use a quiet fan for improved ventilation Poor Bass Performance from Full Range Speakers connected to XPA 1 e Make sure that your preamplifier does not have the bass tone control level turned down e Many surround preamplifiers have controls which can direct all the bass to subwoofers or let your main speakers play the full range Make sure that the preamplifier has been correctly set If you are not using a subwoofer set the speaker options to Large where possible GMOTIVA USER S CWI ye e Check that the speaker wires have been connected correctly Make sure that the positive of each speaker connects to a positive output of the amplifier and the negative of each speaker connects to a negative output If one speaker is wired incorrectly than it will be out of phase with the others resulting in poor bass performance DOUBLE CHECK ALL THE SPEAKER CONNECTIONS Turn on and turn off thumps e Plug the amplifier into an un switched AC outlet and use the 3 5mm Trigger Input connection with a trigger between 5 12VDC from the source unit or preamplifier such as the Emotiva LMC 1 Preamplifier Processor This should allow the amplifier to turn on and off silently e If your powered subwoofer is the cause of the thump sound not the other speakers connected to XPA 1 plug it into a different 115VAC outlet than the XPA 1 amplifier so there is no power surge conflict e Install a line conditioning device
14. k any ventilation openings or placed in a built in installation such as a bookcase cabinet or closed equipment rack that may impede the flow of air through ventilation openings If installed in a closed equipment rack for custom installations be sure to add forced air ventilation so that it has adequate air circulation The Emotiva XPA 1 Amplifier should be situated away from heat sources such as radiators or any other devices which produce heat The Emotiva XPA 1 Amplifier should be connected to a power supply only of the type described in this User s Guide and what is labeled on the XPA 1 component Power supply cords should be routed so that they are not in high foot traffic areas or pinched by items placed upon or against them paying particular attention to cords at the wall plugs convenience receptacles and the point where they connect into the XPA 1 Amplifier The power cord of the XPA 1 Amplifier should be unplugged from the outlet when unused for a long period of time When it s time for cleaning the Emotiva XPA 1 Amplifier it should be cleaned only as recommended in this User s Guide Never spray liquids directly into the component s vent openings Care should be taken so that small objects do not fall into the inside of the XPA 1 Amplifier The following situations require your Emotiva XPA 1 Amplifier is serviced only by qualified service personnel 1 The power supply cord or the plug has been damaged or 2 Objects have fal
15. len or liquid has spilled into the component or 3 The XPA 1 has been exposed to rain or 4 The XPA 1 does not appear to operate normally or exhibits a marked change in performance or 5 The XPA 1 has been dropped or its enclosure or chassis is damaged SSSI Swe GU y WY The user should not attempt to service the XPA 1 Amplifier beyond the means described in this Owner s Guide All other servicing should be referred to qualified service personnel To prevent electric shock do not use this polarized plug with an extension cord receptacle or other outlet unless the blades can be fully inserted to prevent blade exposure Pour preevenir les chocs electriques ne pas utiliser cette fiche polarises avec un prolongateur un prise de courant ou une autre sortie de courant sauf si les lames peuvent titre inserees a fond sans laisser aucune parllle a decouvert Grounding or Polarization Precautions should be taken so that the grounding or polarization means of the component is not defeated This apparatus does not exceed the Class A Class B whichever is applicable limits for radio noise emissions from digital apparatus as set out in the radio interference regulations of the Canadian Department of Communications ATTENTION Le present appareil numerique n emet pas de bruits radioelectriques depassant las limites applicables aux appareils numeriques de class A de class B selon le cas prescrites dans le reglement s
16. low Always observe proper antenna or satellite dish grounding techniques When lightning strikes there is always the possibility that your antenna or dish mounted high on the roof can become a conduit for lightning and electrically damage any equipment to which it s connected Additionally proper grounding offers safety to the people using the audio video system in the event of an electrical problem EGMCHVA U SER SY Thank You for your XPA 1 Purchase Dear Home Entertainment Enthusiast Thank you for purchasing the Emotiva XPA 1 Amplifier We sincerely believe that it offers you outstanding performance and value Emotiva products are engineered and produced with the highest quality materials and incorporate the latest technology We think you will find the Emotiva XPA 1 meets or exceeds your expectations The Emotiva XPA 1 is a flexible high performance amplifier It has been designed for maximum performance ease of use and installation flexibility By employing cutting edge technology the Emotiva XPA 1 easily power to your speakers at high power levels at the same time remaining as efficient as possible regardless of volume levels This allows you to fully enjoy audio and video sources without concern for dynamic headroom during complex musical passages and high level effects What s more the Emotiva XPA 1 does it all with exceptionally refined cosmetics and a sound quality that will satisfy even t
17. mum requirement that can can consume nearly one entire circuit please use a second separate electrical connection for other devices DO NOT plug the XPA 1 into a power strip or extension cord unless the device is specifically specifically designed and rated for high current use Refer to your preamplifier A V source component s and video display owner s manuals to learn the power requirements so you can safely plan your electrical power requirements for your home entertainment system Upon powering up the XPA 1 with the front panel switch or via 3 5mm trigger input switch on the rear panel must be set to ON you will notice the front panel LED lighting starts off red for 5 seconds and then turns to blue This indicates the amplifier is on functioning normally and ready for operation If you experience no LED light or a blinking red LED light while the amplifier is on during otherwise normal operation please refer to the troubleshooting section of this manual Physical Placement Place the XPA 1 on a flat level surface Please distribute the weight equally on the four feet Please give this unit adequate ventilation for proper cooling when placing If this unit is placed in a cabinet please make sure that the cabinet s rear is open to fresh air and there are at least 6 inches of free air space above the amplifier and 1 inch on each side If the amplifier is located on a carpeted surface place a board under the amplifie
18. nce These professionals have years of experience with a wide range of home entertainment and lifestyle products and can offer you assistance in troubleshooting and rectifying problems WML GMCTHVA u S ER SY BPR XPA 1 Technical Specifications Rated Power Output Frequency Response 20 20Khz 10 100Khz Total Harmonic Distortion THD Signal to Noise Ratio DC Offset Crosstalk Damping Factor Input Sensitivity Range Gain Input Impedance RC A Input Balanced Input External Trigger Input Clearance for ventilation Back Electrical Power Requirement Electrical Power Consumption Raw Weight Shipping Weight Dimensions One Channel Driven 1Khz 115 AC 60HZ supply THD noted 500 Watts into 8 Ohms 1 THD 1000 Watts into 4 Ohms 1 THD 0 1dB 1 3dB 80kHz measurement bandwidth lt 0 040 gt 100dB Unweighted Full Output Reference lt 10mV gt 80dB Approximately 200 into 8 Ohms 34 5dB 20K Ohm 18K Ohm 5 12 VDC center tip of 3 5mm jack is positive Minimum 2 50 mm 1000 watts 115VAC when driven into 8 Ohms 4 Watts Standby and 90 Watts Idle 76lbs 34 5kg 89 2lbs 40 5kg 24 53 W x 23 07 H x 11 73 D 623mm W x 586mm H x 298mm D CMOTIVA u SER SYM Limited Warranty The Emotiva XPA 1 has been created to perform flawlessly for many years As a result of this quality and craftsmanship Emotiva offers the following warranty to
19. nually from the front panel switch or automatically with the trigger input via 3 5mm input jack Speaker Outputs 5 way Binding Posts These are the speaker outputs The 5 way binding posts accept stripped speaker wire banana plugs single or dual or spade connectors Be sure to observe correct polarity when connecting speakers and be sure that the wires do not touch between positive and negative terminals Note Potentially lethal voltages present Never connect disconnect or modify speaker wiring with the amplifier turned on CMOHVE USER S n Installation and Connections AC Power Considerations Ensure that the unit is plugged into an outlet capable of supplying the correct voltage and current specified for your model Remember to account for the electrical power that other components will require if they share a common wall socket or electrical circuit The majority of household electrical sockets in places other than the kitchen and garage are 15 amperes maximum Most DVD players and other source components are fairly low current items The Emotiva XPA 1 requires a minimum of 10 amperes 115volts or 5 amperes 230 volts It should be sufficient to allow the other devices such as preamplifiers and A V source units to share a wall socket but power amplifiers such as the XPA 1 and a video display big screen TV or video projector should be provided a SEPARATE electrical connection on a SEPARATE circuit As the XPA 1 has a mini
20. o check the troubleshooting guide in this manual to rule out the possibility of something simple you may have overlooked Please remember this is a complicated product and most instances of perceived product failure are the result of improper set up or operation Emotiva and its dealers will help you ascertain whether you have an operational problem or product defect Once you have obtained the R A number you must print this clearly on the outside of the box so it will be possible to determine from whom the XPA 1 came once it arrives Parcels arriving without an R A number will be refused and returned freight collect If you purchased your unit directly from Emotiva or from an authorized Emotiva Dealer please send your repairs with R A number to Emotiva Audio Corp Attn Repair Department 106 Mission Court Suite 101 Franklin TN 37067 Emotiva Disclosure Reference Put your R A number in this spot Copyright 2008 Emotiva All Rights Reserved Emotiva reserves the right to make improvements to its products at any time Therefore the specifications of the product and the specific details of this manual are subject to change at any time UUA KMOTIVA Emotiva Audio Corp 106 Mission Court Suite 101 Franklin TN 37067 Toll Free 877 EMO TECH Website www emotiva com Rev 1 06 12 2008
21. owners of the XPA 1 Emotiva Audio warrants the XPA 1 to be free from defects in materials and workmanship for a period of five years from the original date of purchase The following items are excluded from or will void this warranty coverage 1 Damage to the XPA 1 caused during shipment and handling 2 Damage to the XPA 1 caused by accident misuse or abusive operation contrary to the instructions specified within this manual 3 XPA 1 units that have had the serial numbers defaced modified or removed 4 Damage to the XPA 1 resulting from a modification of or attempted repair by any person or company not authorized by Emotiva 5 Any XPA 1 unit purchased from a non authorized dealer 6 Emotiva does not assume liability for loss of use or damage to associated or connected equipment 7 Emotiva also does not assume liability for the shipping charges incured to or from Emotiva Audio Corp All shipping charges are the sole responsiability of the user 8 Emotiva Audio Corp does not assume the responsiability to provide a replacement unit during times of service Service Assistance for the XPA 1 Please note that BEFORE sending your XPA 1 in for repair you MUST call Emotiva and obtain a return authorization R A number Before contacting Emotiva to begin the R A process please have as detailed a description of the problem s you are experiencing and the conditions under which the problem s occur Additionally please be sure t
22. r s feet If the cabinet s design will not accommodate an open rear install two small brushless DC fans such as those used in computer cases to provide continuous air flow into and out of the cabinet Do NOT block the ventilation holes on the XPA 1 The XPA 1 is equipped with a massive torroidal power transformer This transformer generates a magnetic field that could induce a hum in a turntable particularly a turntable equipped with a moving coil cartridge Do NOT place a turntable directly above or directly adjacent to the XPA 1 Before placing the XPA 1 on a shelf verify that the weight bearing capacity of the shelf is 80 lbs or greater The amplifier is heavy and should be placed toward the bottom of an audio rack to minimize the rack being unnecessarily top heavy EMOCHVA u SERI SMEM Input Connection Considerations Whenever possible keep preamplifier level audio cables away from electrical power cords by at least a few inches It s more important with amplifiers as the AC power cords are carrying much more current than other source and preamplifier components which means there is a larger degree of noise or hum potential with the amplifier power cord in close proximity Output Connection Considerations The output connectors provided on each channel of the XPA 1 are standard binding post speaker connectors with industry standard spacing These are sometimes called 5 way binding posts because of the many w
23. ries connection is established when voice coils are connected in a j d e The positive output terminal of the right channel connects to the positive input post of the first speaker e The negative input post of the first speaker connects to the positive input post of the second speaker Se e The negative input post of the second speaker connects to the speakers negative output terminal of the right channel The total impedance of speakers in series is found by adding their impedances together For example two four ohm speakers in series is an eight ohm load Series connections are easier on the amplifier than parallel connections as the total impedance is higher than driving a single speaker Parallel A parallel circuit is established when voice coils are connected in a way that there are multiple paths for audio signals to flow in and multiple paths for audio signals to flow out When speakers are connected in parallel the total resistance at the amplifier is proportionally divided based on the value of each individual voice coil resistance The term divided simply means all of the values together in parallel are a SMALLER value than each all by itself For example if you were to parallel connect two speakers to the front right channel of the amplifier e The positive output terminal of the right channel connects to the positive input post of the first speaker and to the positive post of the An example of a PARALLEL
24. ssor loop or a tape monitor loop is engaged e Check that your preamplifier or source is running the correct surround sound mode Maybe it is set for 2 channel stereo when you were expecting 5 1 surround sound e Check in case any missing channels have been turned off in a preamplifier setup menu For example the center amplifier channel will not receive a signal if the preamplifier has been set to Phantom e If the unit is not on the ON OFFswitch on the XPA 1 might be in the off position e A internal fuse on the unit may have blown Contact Emotiva for assistance The amplifier shuts down often or the line circuit breaker trips often e Check that the positive and negative speaker wires are not shorted together e Make sure that no speakers are shorted internally If you have an ohm meter disconnect the speaker wires and measure the resistance between the speaker s positive and negative terminals Measure all speakers and check their impedance specifications If necessary review the Series and Parallel Connections section of this manual e If you have connected speakers in parallel the overall impedance may be too low It is recommended that you rearrange the speakers in series to increase the overall impedance thus taking some of the load off the amplifier e Make sure that the amplifier has good ventilation and is not overheating Allow good airflow underneath wherever possible If the amplifier is in a closed rack open up t
25. ur le brouillage radioelectrique edicts par les ministere des communications du Canada For questions regarding service please contact Toll Free 877 EMO TECH OT IVA ie www emotiva com WARNING TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE CAUTION TO PREVENT ELECTRIC SHOCK MATCH WIDE BLADE OF PLUGTO WIDE SLOT FULLY INSERT ATTENTION POUR EVITER LES CHOCS ELECTRIQUES INTRODUIRELA LAMELA PLUS LARGE DE LA FICHE DANS LA BORNE CORRESPONDANTE DE LA PRISEET POUSSER JUSQU AU FOND MUM EMOTIVA u S ER CWI ye NEC National Electrical Code Standards A Note for the Cable Television CATV Installer This reminder is to call the CATV system installer s attention to Article 820 40 of the NEC that provides guidelines for proper grounding and in particular specifies that the cable ground shall be connected to the grounding system of the building as close to the point of cable entry as practical Antenna Grounding Outside the House If an outside antenna is connected to the receiver be sure the antenna system is grounded so as to provide some protection against voltage surges and built up static charges Article 810 of the National Electrical Code ANSI NFPA 70 provides information with regard to proper grounding of the lead in wire to an antenna discharge unit connection to grounding electrodes and requirements for the grounding electrode See diagram be
26. very dangerous e If the hum persists disconnect all the source components one at a time from the back of the preamplifier until you identify the problem e Try moving the speaker cables away from any power cords Try just one speaker connecting it to each amplifier channel and see if one channel is bad e Check that the interconnect cables to the amplifier do not have any broken connections The best way to do this is to substitute a known good connection for the suspect connection If you reverse the cables and the problem goes away the cable may be damaged or broken This is possible even if you can t physically see the break as the strain for pulling on audio cables can sometimes break the wire internally CMOTIVA USER S CWI Ground loop isolators are available for audio lines and video devices If you need assistance contact Emotiva Although this is not always an ideal solution the grounding differences between certain home entertainment components sometimes require ground loop isolators This is the exception rather than the rule Other Probable Causes of Noise Speaker noise may also be caused by interference or noise on your AC line Make sure there are no large appliances sharing the line or halogen lamps or light dimming Triac devices e Try connecting your system to another AC socket on a separate line e If the hum is heard from within the XPA 1 and not through the speakers this may also be caused by interferenc
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