LA Amplifiers User Manual
Contents
1. 95dB 2804B8 show tle a somviee gt zovtes gt 20Vins gt 20Vius gt 20VIvs damping factor gt 300 gt 300 gt 300 gt 306 gt 200 input sensitivity ANN 2VAA OV 2 82V 1 41V 3 48V 1 73V 2 5V 4 4V input impedance 20K 210K 2 Soft start short circuit overload DC over heat THD clip limit output protection volume increase gradually function after switch on lack of voltage of SMPS VHF infrasound frequency protection over power limit dynamic range 280dB 280dB 280dB 280dB 280dB voltage gain 26dB 32dB Output circuit class CLASSAB 2STEPS 2STEPS 2STEPS 3STEPS CLASSH CLASSH CLASSH CLASSH ini 220V 10 50Hz gross weight 9KG 9KG 115KG 115KG 135KG packing dimension cm L138xW560xH380 L138xW560xH542 The above result was tested under the term of standard power wave and constant voltage The above result was tested under the terms of standard power wave and constant voltage Schematic illustration2. LA Range of power amplifiers USER S MANUAL Page 1 Contents Preface Important precautions Safety instructions Function description Ex factory setting H series front panel H series front panel function introduction H series rear panel H series rear panel function introduction Basic operation Set up connection mode for H series Reliability protection function Application range Maintenance and troubleshooting Schematic illustration Specifications Page 2 WARNING Please note 4x8 Q speaker each channel High Output Power is about 1 Q 3x8 2 speaker each channel High Output Power is about 2 Q 2x8 2 speaker each channel High Output Power is about 3 Q 1x89 speaker each channel High Output Power is about 7 Q Minimum Load is 2 2 don t use 4x8 Q speaker each channel you will destroy amplifier Longtime overload or overloaded input signal can destroy amplifier too No warranty with unauthorized opening in electronic workshop or overloading Don t open High Frequency and High Voltage inside don t touch speaker wires risk of life Page 3 Preface Thank you for purchasing H series amplifier Please read the user s manual carefully before you use the product It will give you correct guidance about using the product IMPORTANT PRECAUTIONS A IMPORTANT PRECAUTIONS A 1 Before using the product please read the user manual carefully and retain it for further reference 2 Must use power supply same as the vol
3. ard specification fuse inside It is used to protect amplifier from damage If the amplifier was connected to power supply but the LED was not light please check the fuse situation If you found the fuse broken you must replace it with a fuse of same specification 3 CHI binding post output Red color connects to the positive port of speaker Black color connects to the negative port of speak In bridge mode just uses red color to connect the positive port of speaker 4 CHI SPEAKON output This output socket SPEAKON is used to connect with speaker Connecting 1 amp 2 1 amp 2 5 Output socket in Bridge Use the output socket to connect with the speaker when the amplifier works in bridge mode Connecting 1 connects to the positive port of speaker 1 connectors to the negative port of speaker 6 Operation mode selector This switch is used to choose the operation mode of the power amplifier Stereo mode Two channels are independently input and output PARALLEL mode Use CH1 to input signal independently Output independently from two channels BRIDGE MODE Use of CHI and of CH2 to input signal output from 1 and 1 of SPEAKON 3 7 Bridge indicator The indicator lights when the amplifier is on bridge mode 8 Input Sensitivity selector This selector allows to choosing the input sensitivity 0 775v 1 0v 1 4v 9 CHI bypass socket It is parallel connection with XLR input of CHI providing output signals same as the in
4. mode connect the CH1 input to sound source such as mixer CD output set the mode at BRIDGE adjust the CH1 volume to suitable position connect the SPEAKON of the BRIDGE OUTPUT to the speaker parallel mode 1 2 3 4 sar 8 a 10 i f 73 ee ye regE ar ir ON ON AD Ti e e ot el ATY a sh gered Ei vo cn c ae gamn _ lt o tee E s I P 7 Lo lo N vi m daneas ir 12 13 s 15 16 7 In this mode connect the CH1 Input to the sound source such as mixer CD output set the mode at PARALLEL adjust the two channels volume to a suitable position connect the two SPEAKON to two speakers In this mode connect the CH1 input to sound source such as mixer CD output set the mode at PARALLEL adjust the two channels volume to suitable position connect the two SPEAKON to two speakers Page 9 Protection 1 CLIP LIMIT It is used to prevent the speakers from dangerous clip signal CLIP LIMIT monitors the distortion produced by amplifier output When distortion exceeds 1 Clip limit will reduce the input signal to ensure right signals from amplifier Note If the input signal already has CLIP or exceeds linearity working range of input circuit the CLIP LIMIT will be invalid 2 Over heat If the amplifier works at full loading for a long time and the fans have reached the highest speed If this status continue and the temperature rise up to over 95 degree the amplifier will go into over heat pro
5. ow are some simple methods to check if the amplifier has been damaged or not 1 No output If the signal LED is illumed based on the signal the amplifier shall be fine please check if the SPEAKON output is well connected 2 Low signal output If the signal LED is illumed and clip LED lit please check if the output port is short circuit If the signal LED is illumed and the protection LED is lit the amplifier shall be at protection stauts There are two possibilities one maybe over heat protection another maybe VHF protection Cancel the signal you can test if it is VHF protection If the amplifier chassis temperature is very high it should be over heat protection If the input voltage is too low it may lead to lack of voltage protection the lowest AC voltage is 160V 3 If the failure is still existing after check the above please return the equipment to the authorized service agent it should be repaired by skilled person Page 10 Schematic illustration Page 11 Specifications modal MTA LAO7 MTA LA1O MTA LA15 MTA LAZO MTA LAG Sohm sterco power RMS 200WX2 SBOWX2 450WX2 ONWX 1200WYX 4ohm siereo power RMS 380WX2 SOOWX2 750WX2 1000WX2 1850WX2 Zohm stereo power RMS 500WX2 750WX2 900WX2 1200WX2 2000WX2 Bohm bridge power EIA S00W SOOW 4400W 2000W 3700 frequency response 20Hz 20KH2 82 0dB 0 50B THD N lt 0 05 lt 0 05 lt 0 05 lt 0 05 lt 0 05 SIN rate gt 95dB gt 95dB gt 95dB gt
6. put signals 10 CHI XLR input This XLR input is balanced input It connects to the upper audio processors 11 Power cord This is the power supply cord Before plug it into AC power supply please connect to a power plug which conforms to the power socket of local requirement Meanwhile please kindly check whether the amplifier marked voltage is conform to local required voltage of not 12 CH2 binding post output Red color connects to the positive port of speaker Black color connects to the negative port of speaker In bridge mode just uses red color to connect the positive port of speaker 13 CH2 output SPEAKON port This output port SPEAKON is used to connect with speaker Connecting 1 amp 2 1 amp 2 When the amplifier is in bridge mode this port is not in use 14 Grounding selector switch You can use this switch to cut the AC voice when operating the system 15 30Hz high pass filter selector This filter can cut the frequency below 30Hz to prevent low frequency signal getting into amplifier and speaker so as to save the energy consume of amplifier and protect the speaker 16 CH2 bypass socket It is parallel connection with XLR input of CH2 providing output signal same as input signal 17 CH2 XLR input This XLR input is balanced input It is connected to the upper audio processors Page 8 Bridge Mode A SAR Ew amp mpy i e n om tia lt gia BIBI Riti DIO o tre I wf ss 3 x x In this
7. re Place power amplifier away from heat sources such as radiators or other heat source Keep in mind the following when connecting amplifier Read the user manual before connecting the amplifier Connect each connection of the amplifier perfectly If not it may cause burn damage electric shock in case of disconnection To prevent electric shocks do not open top cover Connect the power cord with safety after check the AC power A CAUTION Wearing eth dangerous voltage ron nsutiben conponerte inside enough to Giese aleetic shock do net open retam lo aytherired service Carter or ropairod by spectted people falle to reduce Eye rtik of fire oF electric shock Go not expose Pis equipment to rain or moisture Function Descriptions This product applies for brand new tunnel heat sink cooling system which increases the heating radiation efficiency and decreased working temperature of the amplifier The amplifier module adopts Class H circuits which increase the total efficiency to be 70 and much power as the speakers in a limit space Plus the product is equipped with DC short circuit VHF over current and soft start protection These functions greatly increase the stability and reliability of the products The best loading condition for this series amplifier is at 8ohm It adopts the output power to make sure that the amplifier is working under the rated power so as to avoid the risk of damage because of over loading This amplifier is wi
8. rotection Indicator The amplifier is under protection when this indicator is on 6 Signal Indicator When this indicator on the output port of the amplifier already has signals 7 Power Switch This switch is used for power on and off 8 Handles Handles are used for easy transportation 9 CHI Volume control In bridge mode this potentiometer controls two channels volume the CH2 potentiometer invalid In stereo or parallel mode this potentiometer just controls CHI volume Gain control range 80dB 0dB available turning angle is 280 degree 10 Bridge indicator in orange color When this indicator lights the amplifier is on bridge mode 11 Parallel indicator in orange color When this indicator illumes the amplifier is on parallel mode 12 CH2 volume control In bridge mode this potentiometer invalid the volume is controlled by CH 1 potentiometer In stereo or parallel mode the potentiometer just controls CH2 volume Gain control range 80dB 0dB available turning angle is 280 degree 13 Stand by Power indicator This indicator lights when the equipment is connecting with power It will be off when the power indicator lights Page 6 7 Rear panel 2 3 4 67 8 a 10 J mo sogas e ET mte oer coro a a N nt g A l al e v LELE t o cise serna sesereee _ D mi FEO V adi br Mix n 12 19 4 15 16 17 1 Air exit This part is air exit Don t obstruct it 2 Fuse Holder The fuse holder includes a stand
9. tage label on the rear panel the product will not be guaranteed if for improper voltage used 3 The grounding cable of the equipment must be connected with the power supply grounding cable Please make sure the power supply grounding cable is connected with the ground 4 When this model is connected to the power supply the standby LED is on Some components are connected to the electricity 5 At bridge mode the output connector of amplifier should not be connected with the head of the scope or it will cause damage to the amplifier and the test equipment 6 The input level of the amplifier shall not be higher than the rated sensitivity value 7 Don t connect the output of any channel with the input of another channel Don t parallel or serial connect the output of one amplifier to the output of another amplifier 8 The power of amplifier must be 50 100 higher than the rated power of speaker 9 Make sure the current using status of the amplifier is accordance with the input mode 10 Usually the volume control is set at 80db 11 If one signal has to be separated for several amplifiers we suggest using signal distributor 12 Don t obstruct the air entrance and air exit 13 Don t use sine wave to test the power of amplifier you will damage the amplifier Page 4 Safety Instructions Read all safety instructions before operating amplifier Install equipment as follows Install it in a flat place Keep the amplifier away from water or moistu
10. tection status and the protection indicator PRO on the front panel will light on The amplifier will have no output when it is under PRO status Therefore the users are suggested to correctly operate the amplifier the loading should not be under 2ohm and maintain the airflow good and free 3 VHF If the amplifier output reaches a certain range and frequency exceeds 10Khz such as MIC feedback noise amplifier may go into VHF protection after 3 seconds the protection indicator PRO on the front panel will be on and the speakers do not have sound but it will recover automatically after protection circuits startup for 10 seconds If the output signal does not change it will keep on VHF protection 4 Short circuit protection It makes the output transistors work at safe range When output is in short circuit the protection indicator PRO on the front panel will be on and the amplifier has no output The equipment will be recovered after 10 seconds when the terms of short circuits removed 5 AC local power protection If the AC power voltage lower than the allowed working voltage 160v the power supply will be turned off automatically until the power voltage is normal 6 DC protection If the output signal has large DC voltage 2 6V in order to protect the speaker the DC protection circuit will be startup the protection indicator PRO on the front panel will be on and the amplifier has no output Maintenance and Trouble Shooting Bel
11. th advanced switching power supply standing out the small volume and light weight compared with same power products favorable to save transportation cost and reduce loading difficulties The output stage circuit adopts transistor collector output mode which makes the transistors with stronger loading ability It is good for product stability Ex factory setting 1 All the volume adjustment button was set at 80 2 The power switch was set at OFF 3 Working mode selector switch was set at STEREO 4 Sensitivity selector switch was set at 26dB Page 5 ATTENTION mont 06 G08 GURCTRGLE AE Si e MING enni Te tesa oe Pani OF ECT HOEK DO MEI PIPE PAR OIP TO BAM CHI SOTIE Important direction Other control functions and adjustment functions that do not introduce in the user s manual may cause mechanical danger or radiation due to other outside factors H Series panel description Front Panel Pen terntone BOF Soon npt NNT OTT TIM OPTI TTY TI 5 1 Installation Socket Use to fix when install to the rack 2 Air Entrance This part is air entrance Don t obstruct it 3 Power ON Indicator When this indicator is on the main power supply system of amplifier has been working 4 CLIP Indicator When this indicator is on the amplifier has reached its maximum output power CLIP The distortion is about 0 5 you have to turn down the input signal to make sure the amplifier work under low distortion 5 P
Download Pdf Manuals
Related Search