Professional Amplifiers AX Series – Manual
Contents
1. black A we ih as shown on the right drawing WARNING FOR YOUR SAFETY do not touch uninsolated metal parts of the amplifier when the unit is switched on Make all neccessary connections with disconnected power cord Front Panel PEAK SIGNAL PROTECT OH PROTECT SIGHAL PEAK 0O O YOLUHE 1 WOLUME 2 LED indicators The comprehensive LED indicators let you monitor the most important parameters of the amplifier ON After the amplifier is switched on the green LED in the middle between the volume controls will light When this LED remains dark you should check the power cable the wall outlet etc PEAK Two red LED indicators one per channel LEDs are on when the amplifier is driven beyond the rated output power The LED directly reflects the amount of distortion A short blinking of the LED indicates that the output signal is close to clipping but the resulting distortion may not be heard yet SIGNAL Two green LEDs per channel Lights when a sufficient input signal is achieved When the LED is steady on when the output power reaches its maximum value If these LEDs remain off you should check on the volume controls increase the volume if neccessary You might also check the input connections of all signal sources If the peak LED comes up despite no or only a very weak signal are indicated check the output cables regarding short circuit When the signal LED is lit without any input signal most likely syst2. controls clockwise to increase amplification and counterclockwise to reduce it In fully counterclockwise position the signal is attenuated by appr 60 dB which means you barely might hear anything For safety reasons the knob of these controls can be removed and the holes can be filled with the attached blind covers Technical Specifications Output Power 100 V 1 kHz 1 THD Model AX 2120T 2 x 120 W Model AX 2240T 2 x 240 W Input Sensitivity 1V Input Impedance 20 kO balanced Total Harmonic Distortion THD lt 0 02 1 kHz Frequency Response 20 20 000 Hz 0 3 dB Signal to Noise Ratio gt 100 dB Output Voltage 100 V at nominal input voltage Cooling automatic controlled variable speed fan Inputs XLR balanced male and female Outputs binding posts touch proof Electronic Protections Thermal overload short circuit open circuit current limiter and RF Stable into reactive and mismatched loads AX T SERIES IOO V Professional Amplifiers LED Indicators for on off signal present activation of protection circuits and signal overload peak and protect Power Supply 230 V AC 50 Hz Power Consumption Full Power 530 W AX 2120T 1060 W AX 2240T 73 Power 235 W AX 2120T 440 W AX 2240T 1 Power 130 W AX 2120T 230 W AX 2240T Heat Emission Full Power 254 kcal AX 2120T 482 kcal AX 2240T 73 Power 135 kcal AX 2120T 245 kcal AX 2240T 1 Power 86 kcal AX 2120T 145
3. for non rack applications Rack mounting For mounting the amplifier into a standard 19 rack pls use 4 screws and washers For surface mounting please use the attched 4 selfadhesive rubber feet on the bottom of the unit Hint for the amplifier model AX2150 The depth of this model is 278 mm instead of 389 mm er mn A 2 nn 389 0 mm ae nn 850mm SI en im 353 0 mm 76 0mm Cooling scheme Airflow in the AX amplifiers is from rear to front as indicated in the following schematic drawing The fan speed is automatically controlled via thermo sensors Please make sure that the rear airflow slots are not blocked Professional Amplifiers AX Series Manual Connection to power line Make sure that the power on off switch of the unit is in off position before you connect the raer IEC power plug with a 230 V power outlet Inputs Each channel is equipped with a 3 pin balanced XLR connector male and female for a loop through of the signal The nominal imput impedance is 20 kOhms balanced or 10 kOhms unba lanced Due to the fact that noise interferences and hum are drastically reduced in balanced lines especially when long cable runs are a neccessesety we strongly recommend to use a balan ced cable network Unbalanced connections should only be used on short cable runs The source impedance of the signal should be lt 600 Ohms In an unbalanced configuration use the pin 2 for the signal a
4. Professional Amplifiers AX Series Manual AX2120T AX2240T AX2150 AX2300 AX2500 AX2800 PAT oset Becker Pro Audio Technik zum wartturm 15 0 63571 Geinhausen Germany Fon 49 6051 9140 0 Fax 9140 59 mail proaudio technik de www proaudio technik de Professional Amplifiers AX Series Manual IMPORTANT SAFETY PRECAUTIONS amp EXPLANATION OF SYMBOLS CAUTION TO REDUCE THE RISK OF ELECTRIC CAUTION SHOCK DO NOT REMOVE THE COVER NO USER RISK OF ELECTRIC SHOCK SERVICEABLE PARTS INSIDE REFER SERVICING DO NOT OPEN TO QUALIFIED PERSONNEL The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated dangerous voltage within the product s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to humans The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance servicing instructions in this manual The lightning flashes printed next to the OUTPUT terminals of all AX amplifiers are intended to alert the user to the risk of hazardous energy Output connectors that could pose a risk are marked with the lightning flash Do not touch output terminals while amplifier power is on Make all connections with amplifier turned off WARNING TO PREVENT FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE Professio
5. em oscillation or other faults may be the cause In this case try to shut off the load disconnect the speakers or and reduce the ampli fication down to zero If the signal LED still stays on the amplifier possibly might need servicing Professional Amplifiers AX Series Manual PROTECT Two red LED indicators per channel In normal operation the LED remains off If the LED comes up the thermal protection circuit is activated If the amplifier is becoming too hot please leave the unit on so that the neccessary cooling by he automatic regulated fan brings the amp to normal operating temperature again When reaching this safe operating temperature the amplifier goes back to normal operation within appr 1 minute Make sure that sufficient airflow from rear to front is possible and that the rear cooling slots are not blocked A fast blinking of the peak LED indicates a short circuit or an overload of the output current circuit and can lead to overheating of the amplifier When distortion becomes noticable wit hout indication of the clip LED the problem most likely is located in the chain before or after the amplifier Check wether the loudspeakers are faulty or the signal source is at too high levels The volume controls of the amplifier should be in the upper half appr 3 o clock of the control range so that an input overload is avoided If the protect LED remains on the amplifier might need servicing Volume controls Rotate these
6. g AX 2300 12 kg AX 2500 15 kg AX 2800 19 kg Josef Becker Pro Audio Technik Zum Wartturm 15 D 63571 Gelnhausen Germany Fon 49 6051 9140 0 Fax 9140 59 mail proaudio technik de www proaudio technik de
7. kcal AX 2240T Figures also available in Btu hr Dimensions 483 Standard 19 Rack x 88 2U x 387 mm W x Hx D Net Weight Model AX 2120T 12 kg Model AX 2240T 15 kg Data in parentheses Model AX 2240T Josef Becker Pro Audio Technik Zum Wartturm 15 D 63571 Gelnhausen Germany Fon 49 6051 9140 0 Fax 9140 59 mail proaudio technik de www proaudio technik de AX SERIES Professional Amplifiers Technical Specifications 40 1kHz 1 THD 2x150W 2x 300W 2x 500 W 2 x 800 W Input Sensitivity 1V Input Impedance 20 kO balanced Total Harmonic Distortion 1 kHz 3 dB AX 2150 lt 0 05 other models lt 0 02 Frequency Response 0 3 dB AX 2150 20 55000 Hz other models 36 55000 Hz Signal to Noise Ratio gt 106 dB 20 20 000 Hz A rated Cooling automatic controlled variable speed fan Inputs Neutrik Combo XLR phone plug balanced with link out XLR M balanced Outputs Neutrik Soeakon binding posts touch proof rennen Figures also available in Btu hr Electronic Protections Thermal overload short circuit open circuit current limiter and RF stable into reactive and mismatched loads LED Indicators for on off signal present activation of protection circuits signal overload peak and protect Power Supply 230 V AC 50 Hz Dimensions 483 rack x 88 2U x 387 mm w x h x d for all models except AX 2150 278 mm depth Net Weight AX 2150 9 k
8. nal Amplifiers AX Series Manual Introduction and overview With your choice of this Axxent professional amplifier you have decided on a high quality reliable and rugged part of your sound system In order to gain the maximum performance from this amplifier we recommend to carefully read this manual We tried to keep it as compact as possible Important functions and features Models AX2150 AX2500 AX500 and AX2800 2 channels with a nominal imedance of 4 Ohms Models with the suffix T provide electrically insulated outputs of 100 Volts for constant voltage distribution systems 1 Slots for cooling airflow rear to front 9 Ground lift switch 2 Power ON OFF indicator 10 Slots for cooling airflow 3 Volume controls detachable knobs 11 XLR inputs channel 1 4 Indicators for Peak signal and protection per channel 12 XLR connectors for signal loop through 5 Power on off switch 13 Loudspeaker outputs with Speakon connectors 6 IEC power connector 14 Touch proof binding posts 7 XLR Inputs channel 2 15 Touch proof binding posts 100 V 8 XLR connectors for signal loop through 16 Serial number Professional Amplifiers AX Series Manual Content of the packaging box The original packaging contains the following components Please always use the original box when shipping the unit e g for service e Amplifier e User manual e Detachable power cable IEC e Security caps for the control knobs e 4 rubber feet
9. nd connect the shielding to the corresponding pin 1 Finnaly connect shielding and the pin with a wire bridge This procedure is shown in the drawings below Unbalanced XLR inputs connect as indicated in this picture Watch the bridge between pin 1 3 of the XLR connector Balanced XLR inputs connect as indicated in this picture Direct low impedance outputs models AX2150 AX2300 AX2500 and AX2800 Direct low impedance outputs are provided on all of the above mentioned AX models on the rear side of the case above the other ev en audio inputs The speakers may be connected either via touch PEN proof binding posts see drawing right or the Speakon connector S00W 40HM see drawing bottom right Please make sure that the speakers are hocked up with the correct polarity WARNING OUTPUT DO NOT USE SPEAKER LOADS IMPEDANCES WITH LESS THAN 4 OHMS THE Lono un NOMINAL IMPEDANCE IS 4 OHMS FOR YOUR SAFETY do not touch uninso lated metal parts of the amplifier when the unit is switched on Make all o ou neccessary connections with disconnected power cord Professional Amplifiers AX Series Manual Constant voltage outputs models AX2120T and AX2240T Constant voltage outputs 100 volts are available on the above mentioned models on the rear side of the housing using touch Ava proof binding posts Please make sure that the loudspeakers eure are connected with the correct polarity red
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