Manual QSB-636A 648A
Contents
1. Besides 115 230V AC power source QSM 6xxA series booster amplifier also accept DC 24V battery power source as backup power To ensure the amplifier working normally and safe operation it has speaker short over temperature and overload protection function QSM 6xxA series is simple and easy to use booster amplifier 3 Panel Description FRONT PANEL DESCRIPTION QSB 648A PUBLIC ADDRESS AMPLIFIER 1 Power On Indicator LED 3 Power Switch 2 Level Indicator LED REAR PANEL DESCRIPTION SENSITIVITY 1 115 230 50 60 2 VOLTAGE 24V DC IN SELECT i COM 70 100V 19 1 AC Fuse 6 AC Power Input Socket 2 Sensitivity 100mV 1V Selection Switch 7 Earth Connection Screw 3 Low Cut Switch 8 AC Voltage 115V 230V Selection Switch 4 Phone Output Jack 9 DC Power Supply Terminal 5 Phone Input Jack 10 Speaker Output Terminal A Features Easy to use booster Amplifier 8 ohm 70V and 100V speaker output One Phone jack input and one phone jack output Sensitivity Selection Switch Overload over temperature and speaker short protection AC or DC power in 3U height 19 rack or table mounted 5 Power Source AC Power Source The supply transformer has been designed for AC 230V 115V 10 50 60 Hz DC Power Source Battery Connection 24Vdc When using external batteries ground the amplifier via the screw terminal Electrical2. stability of the system will be improved by providing a good earth ground When connecting batteries please ensure correct polarity 6 Connection Input Connection Connect signal source to input jack by using phone jack cable Output Connection Connect output jack to other amplifier by using phone jack cable Speaker Output Connection The speaker output screw terminal is on the rear panel It can connect low impedance 8 ohm or high level 70V or 100V speaker Use only one of these output connections for corresponding speaker Sensitivity Selection Switch Put the switch on 100mV or 1V position for corresponding sensitivity of signal source from other device Low Cut Switch Put the switch on BY PASS or LOW CUT position for the need 7 Operation After all connections are completed turn on the power If necessary turn the level control of the source device to what you desire 8 Technical Specification Booster Amplifier Model 5 636 5 648 360W 480W Power Supply AC 115V or 230V 50 60Hz DC 24V lt 1 1KHz rated power 1V 100mV 10K ohm Outputs 80 70V 100V ignal to Noise Ratio 86 dB Power On Level 960W 1280W 24A 30A 132 H x 425 W x 355 D Weight 15 Kgs 17 Kgs Desktop or 19 rack WARNING THIS APPLIANCE MUST BE EARTHED CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN
3. USER MANUAL QSB 636A QSB 648A BOOSTER AMPLIFIER QSB 648A PUBLIC ADDRESS AMPLIFIER OUTPUT LEVEL 8 SENSITIVITY 115 230 50 60Hz VOLTAGE 24V DC IN SELECT 988959 70V 100V 1 Security Precautions Carefully to READ the instruction in this manual before use Certainly to OBSERVE the INSTRUCTION in this manual regard convention of safety symbols and messages Please KEEP this user MANUAL nearby for anytime reference Safety symbol and Message Conventions Below described safety symbol and messages are to prevent bodily injury and property damage Before operating the amplifier read this manual first so you completely knowing the potential safety hazard and understanding the meaning of the safety symbols and messages Indicates a potentially hazardous situation which if G mishandled could result in death or serious body injury and or property damage Indicates a potentially hazardous situation which if AN CA U T O N mishandled could result in moderate or minor body injury and or property damage WARNING When Installing the Amplifier DO NOT installing or mounting the amplifier in unstable locations such as on the rickety table or the slanted surface It may result in the amplifier falling down and causing body injury and or property damage Be sure to ground to the safety ground earth termina
4. aring DONOT place heavy objects on the amplifier for it may cause it fall and may result in body injury and or property damage Besides the object itself may cause damaged or body injury DONOT operate the amplifier for the extended period of time with the sound distorting It is an indication of malfunction which can cause heat and result in fire Switch the power off and unplug the power supply plug from the AC outlet for safety purposes when cleaning or leaving the amplifier unused for 7 days or more Fire or electric shock may occur If the dust accumulates on the power supply plug or in the wall AC outlet fire may result in Clean it periodically In addition make sure the plug is inserted in the wall outlet securely Contact your local dealer to clean the dust it the dust has accumulated in the amplifier for a long period of time Dust accumulation may result in fire or damage 2 Description QSB 6xxA series booster amplifiers cover models from 120W RMS to 480W RMS This manual is for 360W QSB 636A 480W QSB 648A QSB 6xxA series is the most easy to use booster amplifier It has only one input jack and one output jack And there is one screw speaker output terminal for the direct connection to 8 ohm 70 100V speaker There is only one set of LED as power and level indicators on the front panel the rear panel the sensitivity selection switch is for the sensitivity 100mV or 1V selection
5. l to avoid electric shock Never to ground to a gas pipe for tragic disaster may occur Use the amplifier only with the voltage specified on the amplifier Using the voltage higher than specified may cause fire or electric shock DO NOT cut twist damage nor modify the power supply cord In addition avoid using the power cord close to heaters and don t place heavy object including the amplifier itself on the power cord for it may cause fire or electric shock DO NOT expose the amplifier to rain or the environment where it may be splashed by water or other liquids for doing so it may cause fire or electric shock When using the Amplifier When found following irregular situation during amplifier is in use immediately switch off the power disconnect the power supply plug from the AC outlet Don t try to operate the amplifier again Contact your local dealer to check the amplifier 4 5 SN The amplifier falls Amplifier is malfunction Water or any metallic object gets into the amplifier The smoke or strange smell coming from the amplifier The power supply cord is damaged such as exposure of the core disconnection etc DO NOT put cups bowls or other containers with liquid or metallic object in it on the top of the amplifier If they spill accidentally into the amplifier it may result in fire or electric shock DO NOT touch the power supply plug during thundering and lightning for it may result in elect
6. ric shock DO NOT insert or drop the metallic objects or flammable materials into the ventilation slots of the amplifier for it may result in fire or electric shock DO NOT open nor remove the amplifier cover to prevent fire or electric shock for there are high voltage components inside the amplifier N CAUTION When Installing the Amplifier DO NOT remove nor plug in the power supply plug with wet hands for it may cause electric shock When unplug the power supply cord be sure to grasp the power supply plug DO NOT pull on the cord itself Operating the amplifier with damaged power supply cord may cause fire or electric shock Avoid installing the amplifier in humid or dusty places the area exposed to the direct sunlight locations generating smoke or steam or the spot near the heaters It may result in fire or electric shock When moving the amplifier be sure to remove its power supply cord from the wall outlet Moving the amplifier with the power cord connected to the outlet may cause damage to the power cord and resulting in fire or electric shock When removing the power cord be sure to grasp its plug to pull DO NOT block the ventilation slots of the amplifier chassis It will cause the temperature rising and result in fire When Using the Amplifier Make sure that the volume control is turned to minimum position before power is switched on Loud sound produced at high volume when power is switched on may impair he
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