PUBLIC ADDRESS SYSTEM OPERATION MANUAL A 4308 A 4312 2x120W / 2x240W CLASS-D AMPLIFIER 4 5 6 4 3 7 1 9 8 2 0 4 CH1 5 10 SIG 9 8 CH1 10 0 CH2 5 PEAK PROT OFF 10 SIG PEAK PROT 7 9 ON 8 0 CH2 10 POWER A 4312 2 x 120W CLASS-D AMPLIFIER 6 3 1 2 SIG ON 8 4 7 0 9 PEAK PROT POWER A 4308 2 x 240W CLASS-D AMPLIFIER 6 7 6 3 1 2 5 3 1 2 OFF SIG PEAK PROT Please follow the instructions in this manual to obtain the optimum results from this unit.
1. SAFETY PRECAUTIONS ...............................................................................1 2. PRODUCT OVERVIEW .................................................................................. 3 3. FEATURES....................................................................................................3 4. NOMENCLATURE AND FUNCTIONS 4.1 Front Panel ...................................................................................... ...........4 4.2 Rear Panel ..............................
1. SAFETY PRECAUTIONS Be sure to read the instructions in this section carefully before use. Make sure to observe the instructions in this manual as the conventions of safety symbols and messages regarded as very important precautions are included. We also recommend you keep this instruction manual handy for future reference.
SAFETY PRECAUTIONS When Installing the Unit When Installing the Unit Do not place heavy objects on the unit as this may Never plug in nor remove the power supply plug with wet hands, as doing so may cause electric shock. 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. When unplugging the power supply cord, be sure to grasp the power supply plug; never pull on the cord itself.
2. PRODUCT OVERVIEW The D series digital amplifier is rated from 120W to 500W with balanced signal inputs(H5.08-3 European-style connector) and 100V power outputs (H5.08-2 European-style connector). 3.FEATURES One channel high efficiency class D power amplifier Built in high 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. One channel power amplifier in 1U height.
4 . N O M E N C L AT U R E A N D F U N C T I O N S 4.1 FRONT PANEL 4 5 6 4 3 7 1 9 8 2 0 CH1 5 10 SIG 7 9 ON 8 0 PEAK PROT 1 CH2 OFF 10 SIG 2 1. CH1/CH2 Volume control of the channel 2. SIG Signal Indicator 3. PEAK Clip Indicator POWER A 4312 2 x 240W CLASS-D AMPLIFIER 6 3 1 2 PEAK PROT 3 4 5 6 4. PROT Protection Indicator 5. POWER SWHIT Up: turn on the power Down: turn off the power 6. POWER Power Indicator 4.
5 . M A C H I N E O P E R AT I O N Function 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.
M A C H I N E O P E R AT I O N Key operation on the panel Connect power line AC 190~ 240V ~240V 50Hz BATT SUPPLY DC24V INPUT CH1 CH2 G CH 2 IN G CH 1 IN CH 2 OUT CH 1 OUT 100V COM 100V COM Figure 1 Turn the power switch button, after connecting the device to AC power, the front panel power indicators, protection indicators and remote power indicators and remote protection indicators lit at the same time, after about 3 seconds the light turns off.
M A C H I N E O P E R AT I O N Remote port operation is prior than panel operations, namely when the front panel power switch is off, the device can still be in power on status. Cut off the input DC+24V power, then it can be remoted. Note: The remote power indicator and power indicator on front panel is with the same function, remote protection indicator and the protection indicator on front panel is with the same function.
6. CONNECTIONS Speaker connections Total impedance 83 41 100V COM 100V/COM (A 4308) ( A 4312 ) 100V LINE Speaker connection: 1. Loosen the pressure screw. 2. Put the speaker cable under the wire clamp pad. 3. Tighten the pressure screw and make sure the connection is good.
2 3 CD PLAYER PLAY STOP PREV PLAY MODE AM/FM DTS TUNER AUTO/ AM/FM ST/MON MEM MANUAL UP DOWN 5 6 POWER SD USB EJECT IR STATUS NEXT USB/CD 1 2 4 3 MUTE REMOTE 1: GND 2: COLD3: HOT+ PRE-AMPLIFIER CHIME P.T.
24V Control SH-00497 PWM Power supply SH-00497 Power Factor Correction PFC SH-00503 Power Switch EMI Power Control AC 240V 50Hz 10 PROT/POWER LED BUS POWER transformer 24V Power Inverter 24V Battery 60Hz -18dB 25KHz -12 dB LINE INPUT limit Control GND SH-00531 Preamplifier SH-00524 Volume Gas tube lightning band-pass filter SH-00497 100V COM SH-00497 Preamplifier SH-00497 CLASS-D AMP GND SPEKERS 8.
9 . S P E C I F I C AT I O N S MODEL RATED POWDR OUTPUT A 4308 A 4312 2x120W 2x240W SPDADER OUTPUTS INPUT SENSITIVITY AND IMPEDANDCE OVERLOAD SOURCE ELECTROMOTIVE FORCE 100V ±385mV/20KΩ,Balanced H5.08 European-style connector input ＞11dB,Balanced H5.08 European-style connector input Frequency response 80Hz~18KHz(+1dB,-3 dB ) S/N RATIO ≥85dB THD CONTROLS ≤0.
PUBLIC ADDRESS SYSTEM VersionV0.
