User manual
Contents
1. uuu uuu uu u u AKA 11 10 Thermal Protectio 11 11 LAS GNON Circuit anaa ll llasa u 12 12 DC Voltage gioi eio DEPT 12 13 FREQUCIICISS 2 aaa nana ana 12 14 PAD CIC OS uuu EN uuu O m 13 Table of content 2 17 Gas 1 Safety instructions e This device is suitable for indoor use only e All modifications to the device will void the warranty e Repairs are to carry out by skilled personnel only e Use only fuses of the same type and original parts as spare parts e Protect the unit from rain and humidity to avoid fire and electric shocks e Make sure to unplug the power supply before opening the housing 1 1 FOR SAFE AND EFFICIENT OPERATION Be careful with heat and extreme temperature Avoid exposing it to direct rays of the sun or near a heating appliance Not put it in a temperature bellow 23 F 5 C or exceeding 95 F 35 C Keep away from humidity water and dust Do not place the set in a location with high humidity or lots of dust Containers with water should not be placed on the set Keep away from sources of hum and noise Such as transformer motor tuner TV set and amplifier To avoid placing on un stable location Select a level and stable location to avoid vib2. Hondard pul Jecsilivity pewer at Input Impedance nalancediunnalanced Hum and Noire weighted B0 daw Crasshalk weeghied Tull power ot e E c NR LR Input Connectors per channel Jack amp female Neutrik XLR Female Neutrik XLR amp male Neutrik XLR Dulput Connector per channel 2 way binding posts or Speakon connectors Power Supply Iaclory configured idie Current Draw 22047 D 1A V ono Car Draw musie cod 20 Max Curr Deza mure cond 22011003 22201 185 04 Thermal Emistions 1 8 Power 2030 7125 Thermal Emissions 1 3 Powar 2724 BTU ht 6300 BTU mr 9450 BTU hr l uwcr spesec fons Iwo speed DC Tan air fram front fo rear flow fram rear to front Cooling Can Front panel 2 attenuators power switch Rear panel signal ground lift amp mode switches filter switch LED Indicators per channel Limiter Signal protect Active steel chassis 16 gauge Double thickness in rack ear areas Construction H 1 Width Depth rea ract eae Hay 4B2x3197mm 132 x 483 x 489 Gross Weight Het Weight 13 17 SERIES Appendix B ELXA Block Diagram CHANNEL 7 PREAMP NON INVERTED ATTENUATOR OUTPUT STAGE I gt gt INVERTED lt 2 1 fa P PIN 2 34 JUMPER REAR PANEL SWITCH ON CATE AMP FRONT END
3. User manual ELAA SERIES PROFESSIONAL POWER AMPLIFIERS 11 FOR SAFE AND EFFICIENT OPERATION aaa 3 P FON WC W 4 2ds Rear deo Ric A 4 SEE inicie t EET nen E 5 Jle UNPACKING uuu u I 5 3 2 Installation and 0 5 FON PANO RR E E NE E 6 Ale G e E E E 7 nun A EEE 8 Emm 8 22020 COOMO il NERO 8 TMS I 5 mmm 8 TMS CN mmm 9 ModE SE e u aus Oe 9 MEE 11 216 xg ee net ee oe a aan 9 SC Pano LLY fa eee ne ee 9 BGEA MONO MOOG 9 BA Stereo Mod CoOnlecllols uuu 10 65 Paralel Made uuu sa aa ah Bah GAS Iesus 10 6 6 Bridged Mono Mode Connections 11 11 8 IGM Impedance Sensing cccccccccceessssecceeeeeeeaeeeeeceeeeeseeeeeeeeeeceeessueeseeeceeeeessaeaaeeeeeeeesssaaaeeeeeeees 11 9 Auto Ramp
4. a ATTENUATOR OUTPUT STAGE PREAMP T p CHANNEL AMP FRONT END OUTPUT RELAY OUTPUT RELAY PARALLEL STEREO SWITCH B NON INVERTED B 4 INVERTED 2 34 JUMPER REAR PAWEL SWITCH OM 14 17 Gas stranded Cable Lgthim 2 10 30 Appendix C Wire Gauge Chart Metric Wire Gauge mm2 0 3 0 5 0 75 1 5 2 5 0 5 0 75 1 5 2 5 0 5 0 75 1 5 2 5 0 75 PowerLoss 8 ohm load 2 9 1 74 nm b O 8 af 24 1 74 0 73 15 5 8 2 6 3 2 2 2 1 31 15 17 Power Loss 4 ohm load 5 6 3 4 2 3 1 16 0 70 0 44 2 5 0 2 9 1 74 1 09 0 73 15 5 10 8 2 0 2 9 1 74 1 09 0 73 15 5 9 8 6 3 4 3 2 6 Power 1055 2 ohm load 10 8 6 7 4 5 2 3 1 39 0 87 15 5 10 8 2 6 3 4 4 2 1 45 28 19 9 10 8 6 7 4 3 2 9 45 28 18 2 12 0 8 2 Gas Stranded Cable Lgtn ft 5 40 80 Appendix C Wire Gauge Chart Wire Gauge 18 16 14 12 10 18 16 18 16 14 12 10 18 16 14 12 10 Power Loss 8 ohm load 0 81 0 51 0 32 0 20 0 128 1 6196 1 02 0 64 0 40 0 25 6 2 4 0 2 9 1 60 1 01 0 40 11 9 7 7 5 0 3 2 2 0 1 20 16 17 Power LOSS 4 ohm load 1 61 1 02 0 64 0 40 0 25 3 2 2 0 1 28 0 80 0 51 11 956 if 9 0 3 2 2 0 Power 1055 2 ohm load 3 2
5. i e defective speakers or crossed speaker wires the LRS will automatically protect the amplifier The load will be disconnected by the thermal protection circuitry output relay opens and the amplifier will be shut down Please remove the short circuit and switch on the amplifier again to restart the amplifier 12 DC Voltage Protection If an amplifier channel detects DC voltage at its output terminals the output relay will immediately open to prevent loudspeaker from damage The Protect LEDs will light up and the LCD display will show DC Protection and Fault 13 Subsonic Frequencies Built in high pass filtering provides subsonic frequency protection for each channel In addition a relay will open if excessive subsonic energy appears at the output 12 17 SERIES 14 Appendices Amplifier specifications 0 1 THO N 4 ELXAT D ELXA2600 RMS Power 2 2 X450W 2x X 2000W RMS Power 2 X300W RMS Power Low ndi 20Hz 120MHz 20H2 2D0Hz 0 8408 0d6 t3 ci kari kn E m Crossover Low cul Frequency Response 0 0 598 1W Ea Power Bandwid rated power 4a Protection THD N rated power SMPTE IMD rated power Ba 50 Hz k Tk Damping Factor 16 400Hz at Ka Input
6. 2 0 1 28 0 80 0 51 6 2 4 0 2 5 1 60 1 01 22 14 6 9 6 6 2 4 0 2 4 37 17 8 11 8 7 7 4 1 SERIES Importeur B amp K Braun GmbH Industriestra e 1 D 76307 Karlsbad www bkbraun com info bkbraun com RoHS um Choice of touring professionals 17 17
7. When using three pole STEREO TRS connectors makes sure that the ring fro GROUND connection is made either to the cold outout of the source 97 3 NEGATIVE M Ne 2 a positive equipment or the ground Incorrect connections may cause a 6 dB loss in level 14 Mode Selection Switch This recessed three position switch configures the amplifier for either Stereo Bridge or Parallel mode operation Amplifiers are factory configured at Stereo mode 15 Grounding Selector You have hum or noise in your speaker put the selector in Ground position 16 Air cooling windows This part is the air cooling window Do not obstruct it 17 120Hz Filter Auswahl Subwoofer Full Range Satellite 7 17 Gas 5 Operation 5 1 Connecting Power ELXA Series amplifier power requirements are rated at a idle b 1 8th power typical music conditions c 1 8rd power continuous music conditions d Maximum rated power circuit breaker limited The maximum power current draw rating is limited only by the front panel circuit breaker Consult the specification in the Appendices section for figures on the current that each amplifier will demand Make sure the mains voltage is correct and is the same as that printed on the rear of the amplifier Damage caused by connecting the amplifier to improper AC voltage is not covered by any warranty Unless otherwise
8. amplifier carefully immediately after unpacking If you find any damage notify your supplier dealer immediately Be sure to save the carton and all packing materials If you ever need to ship the unit back to or an authorized service center you should use only the original factory packing 3 2 Installation and Mounting ELXA Series amplifiers ELXA400 are 2 rack space high All mount in standard 19 racks Four front panel mounting holes are provided on each amplifier Rear mounting ears give additional support and use of rear supports is highly recommended in all mobile and touring sound systems 5 17 Gas 4 Front Panel fe 200 000 000 000 200 000 6 0990900090097 ELXA 400 49999999999 00000000077 3000000008 00000000 5 m 20000000 000000 7 UO Dem ai NG 0000000 909000 M I Rack Mounting Ears Two front panel mounting holes are provided on each mounting ear Fan Outlet Grills ELXA Series amplifiers are cooled by two rear mounted fans Cool air flows over the heat sinks and exhausts through the back grills Make sure these outlets remain clean to allow unrestricted air flow Input Attenuators Protect LED Indicates that the channel is in Protect mode speakers disconnected by output relay Limiter LED Illuminates at the clipping thresho
9. he Bridged Mono Mode is 8 ohms which is the equivalent to driving both channels separately at 4 ohms Driving bridged loads of less than the recommended minimums will activate the LRS circuitry resulting in a loss of power and may also lead to a thermal protect condition 9 17 Gaus SERIES Connecting amplifier outputs to oscilloscopes or other test equipment while the amplifier is in bridged mode may damage both the amplifier and test equipment 6 4 Stereo Mode Connections Stereo Mode Connections Speaker to PIN 1 Speaker to PIN 1 6 5 Parallel Mode Connections Parallel Mode Connections Speaker to PIN 1 Speaker to PIN 1 10 17 ELXA 6 6 Bridged Mono Mode Connections Bridged Mono Mode Connections or Bridged 2 Speaker to PIN 1 Speaker to PIN 2 7 LX Clip Limitting At the amplifier s full power limit or clipping point LX will be activated This is indicated by an illumination of the Limiter LED The channel gain is automatically reduced protecting the loudspeakers from potential damage from the high power continuous square waves that would otherwise be produced LX may be activated by uncontrolled feedback oscillations improper equipment gain settings or an equipment malfunction upstream from the amplifier Only steady or excessive clipping not normal program transients will trigger LX The circuit is virtually transparent in opera
10. ld Continuous illumination also indicates that ACL Active Clip Limiting protection circuitry is engaged Power LED Indicates that AC power is connected and the amplifier is turned on Level Indicator AC Power Switch This is the main power switch Press to turn on the amplifier LCD Display Shows the working mode protection status and temperature of the modules 6 17 SERIES ELXA 4 1 Rear Side 10 Output Connectors These have two functions on is binding post the other is speakon Connection to the binding post can be made with bare wire banana plugs or spade lug terminations Make connections to both the channel A and channel B terminals for Stereo or Parallel Mode Using speakon type speaker cables make connections to both the channel A and channel B connectors for Stereo of Parallel mode See the section on mode selection for more information 12 13 Balanced 1 4 TRS amp XLR Input Connectors These connectors accept input signals on balanced TRS and XLR TIP POSITIVE input plugs See the figure at the left for information on polarity _RING NEGATIVE Connectors for each channel are in parallel The unused connectors SLEEVE GROUND d may be used for loop through connect ion to other amplifiers NOTE Unbalanced TIP SLEEVE plugs may be used with the balanced TRS Tip Ring Sleeve connectors The RING terminal or 4 negative input will be connected to ground internally
11. ration Do not use chemicals or volatile liquids for cleaning Use a clean dry cloth to wipe off the dust or a wet soft cloth for stubborn dirt If out of work contact sales agency immediately Any troubles arose remove the power plug soon and contact with an engineer for repairing do not open the cabinet by yourself it might result a danger of electric shock Take care with the power cable Never pull the power cable to remove the plug from the receptacle be sure to hold the plug When not using the device for an extended period of time be sure to disconnect the plug from the receptacle 3 17 Important Damages caused by the disregard of this user manual are not subject to warranty The dealer will not accept liability for any resulting defects or problems Make sure the electrical connection is carried out by qualified personnel All electrical and mechanical connections have to be carried out according to the European safety standards 2 Front View ELXA400 ELXA900 Front View MO 009000 0000000006 440000000000 000000000 height am 000 0000 3 5 Eme SN Os a y 88mm M 90 eee a Front width 483mm 2 1 Rear amp Side Views LULUH H 43Dmm q 397mm ELXA400 ELXA900 4 17 Gas 3 Introduction Cong
12. ratulations on your purchase of a new ELXA Series professional power amplifier and thank you for your confidence in products You are among the growing number of audio professionals who have made one of the world s leading suppliers of professional and commercial industrial audio systems For your safety please read the manual before installing and operating the amplifier The ELXA Series is based on the same advanced circuit topologies that have made amplifiers the choice of touring professionals worldwide ELXA Series amplifiers are designed for high operating efficiency and accurate sonic performance across the full audio bandwidth even under stressful conditions In order to maintain strict quality assurance standards all ELXA Series amplifiers are built In s State of the art CHINA manufacturing facility Inner components are the finest available and key sub assemblies are pretested before final assembly Finally each amplifier is burned in and thoroughly tested using precision audio test equipment before shipping In addition all ELXA Series amplifiers in corporate exclusive Tour Class protection feature to safeguard both internal circuitry and connected loudspeakers This proven combination of advanced design quality construction and comprehensive circuit protectors is your guarantee of fail safe reliability You can depend on consistent stable performance 3 1 Unpacking Please inspect the
13. scape If the amplifier is rack mounted do not use doors or covers on the front of the rack If the amplifiers are to be used in racks with closed backs allow at least one 1 standard rack space of opening in the front of the rack for every four amplifiers 5 3 Connecting Inputs Use either the XLR or 74 input connectors on the rear to supply audio signals to your ELXA Series amplifier Both connectors accept balanced and unbalanced audio connections The ELXA Series amplifiers are configured standard with Pin 2 hot on XLR inputs Please note that some other 8 17 Gas amplifiers are configured with Pin 3 hot The unused connector can be used to jumper the audio input to another amplifier input 5 4 Connecting Outputs Speakers are connected using 5 way Output Binding Post or Speakon connector depending on version supplied Please note that on the 5 way Output Binding Post version of the ELXA two pairs of 5 way binding posts are provided for each channel so that paralleling of speakers is possible 6 Mode Selection The three position recessed Mode Select switch located on the rear panel configures the amplifier for either Stereo Parallel or Bridged Mono Mode Amplifiers are factory configured for Stereo Mode 6 1 Stereo Mode In Stereo Mode both channels operate independently with their attenuators controlling their respective levels Signals at Channel A s input produces output at Channel A s output
14. specified when ordered ELXA amplifiers are configured as 230V 50Hz Note Always turn off and disconnect the amplifier from mains voltage before making audio connections Also as an extra precaution have the attenuators turned down during power up 5 2 Cooling System ELXA Series amplifiers use a twin tunnel forced air cooling system to maintain a low even operating temperature Drawn in by dual 45 cubic feet per minute CFM fans on the rear panel air flows the cooling fans of the channel heat sinks dissipating power transistor heat then exhausts through the front panel slots The intelligent variable speed DC fans are controlled by heat sink temperature sensing circuits When the amplifier is turned on the fans briefly rev up then slow to an idle this indicates that the temperature sensing circuits are operating normally The fan speed increases only as required by heat sink temperatures keeping fan noise to a minimum If either heat sink surpasses the maximum allowed temperature the sensing circuit will open the output relay disconnecting the load from that channel If the power transformer overheats another sensing circuit opens both channel output relays until the transformer cools to a safe temperature Important To ensure optimum cooling periodically clean the amplifier fan filters removable without tools Also make certain that there is enough space around the front of the amplifier to allow the cooling air to e
15. tion and full signal bandwidth is maintained 8 IGM Impedance Sensing IGM Instantaneous Gain Modulation is an innovative circuit that allows the amplifier to operate safley into difficult loads When the amplifier sees a load that overstress the output stage the IGM circuit adjusts the channel gain to a safe level Like LX the IGM circuit is inaudible in normal use In addition if extreme and sustained low impedance is encountered the amplifier s output relay will open 9 Auto Ramp Protection Auto Ramp operates every time the amplifier is turned on or is reactivated after a protect condition is corrected This exclusive feature gradually increases gain to the attenuator setting avoiding unnecessary stress on the loudspeakers 10 Thermal Protection Abnormally high heat sink temperatures will engage the protect circuit for the overheating channel only An output relay disconnects the loudspeakers until nominal temperature range is restored During this time the Protect LED will light and the LCD display will show Protection and Fault if the power transformer gets too hot its thermal sensing circuit will disconnect both channel outputs During this time the Active LED will extinguish the Protect and Limiter LEDs will stay lit and the cooling fan will continue running at low speed Normal operation resumes once the transformer cools to a safe level 11 17 11 LRS Short Circuit Protection If an output is shorted
16. while signal at Channel B s input produces output at Channel B s output Recommended minimum nominal load impedance for stereo operation is 4 ohm per channel Either the 74 TRS input or the XLR input may be used 6 2 Parallel Mode When set to Parallel Mode a signal applied to Channel A s input will be amplified and appear at outputs for both Channels A amp B wird das Eingangssignal des Kanals A verstarkt auf beiden Ausg ngen ausgegeben Either the 74 TRS input or the XLR input on Channel may be used 6 3 Bridged Mono Mode Bridged Mono Mode straps both amplifier channels together to make a very powerful single channel monaural amplifier One channel pushes and the other pulls equally doubling the power over that of either channel alone Signal is applied to the Channel A input only Both attenuators are used to control signal level in addition both must be adjusted to the same setting Either the Ya TRS or XLR input may be used NOTE The channel B input connectors XLR and or TRS may be used to thru the channel signal when in parallel or bridged mono mode Use extreme caution when operating the amplifier in Bridged Mono Mode Never ground either side of the speaker cable when the amplifier is Bridged Mono Mode both sides hot If an output patch Panel is used all connections must be isolated from each other and from the panel The recommended minimum nominal load impedance in t
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