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                                          5

.  M A C H I N E  O P E R AT I O N

Amplifier Function

 

The role of amplifiers is to enlarge the audio signal from audio sources, such as MIC, 
computer and MP3 etc. to boost speaker or pure amplifier to work. 

Constant Voltage Amplifier

The output form of constant voltage amplifier output is constant voltage. It requires a certain  
load of rated voltage. Constant voltage amplifier connects with speakers by the way of multiple 
speakers in parallel form, as long as the total power does not exceed the amplifier total power, 
there can be many speakers in a wire. Constant voltage amplifier output voltage is in fixed form, 
in fact, the audio amplifier output voltage is subject to change, such as in a moment the constant 
voltage amplifier output is 100V, in this moment, amplifier connects with a speaker, the power 
amplifier output is 100V,  connects with two three, or more speakers, the power amplifier output 
is still 100V, of course, this is in the situation of enough power for the amplifier. This constant 
voltage amplifier characteristics is very suitable for school to use, for example, in a school,there 
are 24 classes, most students are in classroom, turn off the speakers, the speaker and the entire 
broadcasting system is disconnected, it is because we use the constant voltage amplifier, a 
speaker is disconnected, and it will not affect the voltage in the entire system line, so it will not 
affect the broadcast in other classes. Constant voltage amplifier and speaker connections must 
be parallel. In the public address system, the distance between speaker and amplifier may be 
more far away, in shopping malls, machine room may be on the first floor, and as far as possible. 

Function

 

Read Before Using The Amplifier

Volume Control

The volume depends on the performance of the speaker, position and some other factors. Pls avoid 
to use the amplifier in the status of high volume for a long time.

Choice Of The Audio Source

In order to play the best performance of this device, please select the balanced signal sources after 
processing by the preamplifier. Local input sensitivity is set to be 0dB (0.77V).
 

Connection Method

Please do not power on until all connections are completed. The audio cable connection need to 
be fixed properly, otherwise it will reduce the sound quality, produce noise, or even damage the 
device. Constant Voltage speakers are paralleled connected with the device (constant voltage 
amplifier). In a supermarket, there is dozens or hundreds of speakers after an amplifier, these 
speakers are on a wire. See wiring diagram of the device for the connection method, the load 
with constant voltage speaker (100V) or all of the speakers, the power is not greater than the 
power of the amplifier's rated output power.

5

Summary of Contents for T-2120D

Page 1: ...is unit We also recommend that you keep this manual handyfor future reference OPERATION MANUAL CLASS D AMPLIFIER T 2120D 2240D 2350D 2500D PUBLIC ADDRESS SYSTEM POWER OFF ON 5 0 1 2 3 4 6 7 8 9 10 5 0...

Page 2: ...Function 5 5 2 Read before using the amplifier 5 5 3 Key operation on the panel 6 5 4 Remote operation 6 5 5 Select the input channel 7 5 6 DC24V backup power battery power supply operation 7 5 7 Fun...

Page 3: ...ke no furtherattempt to operate the unit in this condition as this may cause fire or electric shock If you detect smoke or a strange smell coming from the unit If water or any metallic object gets int...

Page 4: ...ects on the unit as this may cause it to fall or break which may result in personal injury and or property damage In addition the object itself may fall off and cause injury and or damage Make sure th...

Page 5: ...igh efficient active APFC power factor correction power switch Wide voltage 190 240V 50 60Hz to adjust to the work scope With DC24V backup battery function Built in high efficient Class D power amplif...

Page 6: ...0 240V 50Hz Power input Cooling fan 4 PROT 5 POWER SWHIT 6 POWER Protection Indicator Up turn on the power Down turn off the power Power Indicator 4 NOMENCLATURE AND FUNCTIONS 4 1 FRONT PANEL 4 2 REAR...

Page 7: ...voltage amplifier a speaker is disconnected and it will not affect the voltage in the entire system line so it will not affect the broadcast in other classes Constant voltage amplifier and speaker con...

Page 8: ...the same time after about 3 seconds the light turns off The amplifier built in protection relay closed power amplifier and the output connection is regular After device enters to the working status i...

Page 9: ...udio source and turn on master volume control knob the indicator is gleaming Turning up the volume the indicator becomes more bright which means the signal output is greater PEAK Orange topping indica...

Page 10: ...se the device please do not directly touch the 100V speaker output interface of the exposed metal parts in the rear panel to avoid electrical shock 100V COM 41 T 2240D 20 T 2500D 28 T 2350D 6 CONNECTI...

Page 11: ...1 1 2 2 OUTPUT 1 1 2 2 OUTPUT 1 1 2 2 SIG SIG SIG SIG SIG SIG SIG SIG SIG SIG LEVEL LEVEL LEVEL LEVEL LEVEL LEVEL LEVEL LEVEL LEVEL LEVEL LEVEL 2 3 4 5 6 7 8 10 0 1 9 2 3 4 5 6 7 8 10 0 1 9 2 3 4 5 6...

Page 12: ...8 BLOCK DIAGRAM 10...

Page 13: ...e control and status monitor Signal peak protection and power PROTECTION High temp overload short circuit DIMENSIONS WEIGHT 484X300X44 POWDR CONSUMPTION POWER SUPPLY 190 240V 50 60Hz Specific voltage...

Page 14: ...PUBLIC ADDRESS SYSTEM VersionV0 2...

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