USER MANUAL
QSB-6206M
QSB-6212M
QSB-6224M
2-CH BOOSTER AMPLIFIER
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.
WARNING
Indicates a potentially hazardous situation, which, if
mishandled, could result in death or serious body
injury, and/or property damage.
CAUTION
Indicates a potentially hazardous situation, which, if
mishandled, could result in moderate or minor body
injury, and/or property damage.
PANEL DESCRIPTION
■ 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) terminal 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.
WARNING
▓
▓▓
▓ 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.
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 electric 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.
PANEL DESCRIPTION
■ 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.
CAUTION
■ 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 hearing.
DO NOT 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.
DO NOT 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-62xxM series, including QSB-6206M, QSB-6212M, and QSB-6224 is 2 channels
booster amplifier designed for 2 zones application.
Each channel has XLR and phone jack input with its own gain control. And there is one
slide switch to select “Mono” or “Parallel”
Each channel is equipped with XLR and phone jack output for connecting to another
amplifier.
The speaker output is the screw terminal for low impedance 8 ohm, or high level 70V and
100V screw terminal. Choose only one of these output connections to match the speaker.
Besides AC power source, QSM-62xxM series booster amplifier also accept DC 24V power
source from the battery
To ensure the amplifier working normally, it has speaker short, over temperature, and
overload protection function.
QSB-62xxM series booster amplifier is ideal model for two-zone application.
3. Panel Description
FRONT PANEL DESCRIPTION
1. CH1 Power On Indicator LED 4. CH2 Output Level Indicator LED
2. CH1 Output Level Indicator LED 5. CH3 Power On Indicator LED
3. CH2 Power On Indicator LED
REAR PANEL DESCRIPTION
1. Fuse (CH2) 11. AC Power Input Socket
2. Fuse (CH1) 12. Earth Connection Screw
3. DC Power Supply Terminal (Output 1) 13. DC Power Supply Terminal (Output 2)
4. Speaker Output Terminals (Output 1) 14. Speaker Output Terminals (Output 2)
5. Booster Output Phone Jack (CH1) 15. Booster Output Phone Jack (CH2)
6. Booster Output XLR (CH1) 16. Booster Output XLR (CH2)
7. Parallel/Mono Selector Switch (CH1) 17. Parallel/Mono Selector Switch (CH2)
8. Gain Control (CH1) 18. Gain Control (CH2
9. XLR Input Jack (CH1) 19. XLR Input Jack (CH2)
10. Phone Input Jack (CH1) 20. Phone Input Jack (CH2)
4. Features
2 channels booster Amplifier
Individual gain control of each input
8 ohm, 70V and 100V speaker output
AUX and phone jack output
Overload, over temperature, and speaker short protection.
AC or DC power in
2U height
19” rack or table mounted
5. Power Source
AC Power Source
The supply transformer has been designed for use AC 230V(±10%) 50 Hz.
DC Power Source
Battery Connection (24Vdc)
When using external batteries, ground the amplifier via the screw terminal. (Electrical
stability of the system will be improved by providing a good earth ground.) When
connecting batteries, please ensure correct polarity.
6. Connection
Input Connection
Each input has XLR and Phone jack input. Use the one you want.
Speaker Output Connection
The output terminal is on the rear panel. The terminal connection can connect low
impedance 8 ohm, or high-level 70V or 100V speaker. Use only one of these output
connections for corresponding speaker.
Booster Output Connection
Use XRL (female) or phone jack to connect booster output to other amplifier.
Parallel / Mono Switch
Put the switch on Mono position when it does not connect other amplifier. When it is
connected to other amplifier, put the switch on Parallel position to maintain maximum
gain.
7. Operation
After all connections are completed, turn on the power. If necessary, turn the gain control
on the rear panel to what you desire. Suggest turning the gain control at maximum level
always.
8. Technical Specification
Type Booster Amplifier
Model QSB-6206 QSB-6212
QSB-6224
Output Power (RMS) 60W x 2 120W x 2 240W x 2
Main Voltage AC 115V or 230V 50/60Hz Power Supply
Battery Voltage
DC 24V
Total Harmonic Distortion < 1% @ 1KHz, rated power
Sensitivity XLR, Phone Jack (balanced)
1v @ 10K ohm
Outputs 8Ω, 70V, 100V
Signal to Noise Ratio4 86 dB
Indicator Power On, Level
AC Power Consumption
(per Channel)
160W 320W 640W
DC Power Consumption
(per Channel)
5A 8A 16A
Dimensions (mm) 88(H) x 425(W) x 305(D) 88(H) x 425(W) x 420(D)
Weight 11 Kgs 14 Kgs 17 Kgs
Mounting options Table top or 19” rack mountable
WARNING: THIS APPLIANCE MUST BE EARTHED
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