Beta Three | UA330 | B3 UA Series - Delta Audio

R
User Manual
ED-B3-MA-070410-002
Beta three
PROFESSIONAL POWER AMPLIFIER
U A 2 0 0 0 / U A 2 0 0 2 / U A 1 3 3 0 / UA 1 3 3 2
UA660/UA662/UA330/UA332/UA880
DEAR CUSTOMERS:
Please carefully read and strictly follow the user's m anual w hen y ou u se U A series
professional amplifier. If you have any question, please contact the local dealer.
CATALOGUE
1
Attentions
P1
2
Functions&features
P1
3
Parameters
P2
4
Installation
P10
5
Front panel
P10
6
Rear panel
P12
7
Power supply
P12
8
Input/Output connectors
P13
9
Function setup and cable connection
P13
10
Operations
P14
11
Indicators on front panel
P16
12
Protection functions
P16
13
Troubles and troubleshootings
P17
1
NOTES
High voltage inside the equipment. Do not open the cover. Ask for the help from the
professionals when need servicing.
Please do not expose the equipment in the rain or moisture.
Keep adequate ventilation, do not block the port.
Be sure the voltage of this equipment complies with the local industrial voltage.
Please put off the power plug if unused for a long time.
Please connect rated load. Never working under the overload for a long time.
Symbols:
The equilateral triangle with lightning bolt warns the user of dangerous voltage levels
localized within the cabinet.
The equilateral triangle with exclamatory mark means the important operation on the
user's manual.
2
FEATURES
UA series is the amplifier with big power and excellent performance. It can meet
different audio avenues.
1> Big power,dynamic energy;
2> Innovative heat sink structure and high quality heat sink fan assure reliable working for
a long time;
3> "loading impedance temperature-power-running voltage" can be controlled alternately,
Speed of Fan is automatic adjusted by temperature. When load is too low or temperature
is too high, the equipment can adjust the power supply and lower impedance of power,
which improves sound quality and protect the equipment better. The reliability will be
improved remarkably;
4> Low distortion;
5> High slew speed, outstanding sound quality and high transparent;
6> Low noise:S/N>108dB(A Weight);
7> 20Hz~20KHz <+0/-0.25 dB;wide frequency band;
8> Small dimension, 2U rack mounting.
9> UA2002,UA1332,UA662,UA332 are specially designed for low loading imedance,and
can work for a long time under 2 .
1
3
PARAMETERS-UA2000
Stereo mode
Rated Power
Parallel mono mode
Bridged mono mode
8
1000W
4
1600W
8
1000W
4
1600W
16
2000W
8
3200W
THD
<0.05%(10%Rated power
Intermodulation
distortion
<0.1%(60Hz/7kHz,10%Rated power
Frequency response
20Hz~20kHz(+0/-0.25dB)
Phase difference
Damping factors
< 15
>800(8
Segregation
S/N
>75dB
>108dB(A-Weight)
Total gain
39
Difference of
Channel gain
<0.25dB
Input sensitivity
1V
Slew speed
Input impedance
>100V/ s
Unbalanced input 10k ,Balanced input 20k
Input connectors
Three pin XLR/6.35mm
Output connectors
Speakon binding post,NL4 speakon
Cooling
Four fans stepless shifting,
Cooling airflow from front to back
Controls on front panel
Switch of AC,Gain controlling knob for channel A and B
Controls on rear panel
Parallel/Stereo/Bridge, LF cutting,Grounding,Limit
Indicator on front panel
Yellow-Bridge,Red-Overload,Green-Signal
Amplifier protection
Short Circuit, Maladjustment of DC, Overload, Overheat ,Etc
Dimensions
Net weight
483 452
30kg
Power supply
AC 220-230V,50Hz/60Hz,1500VA
Environment
Temperature
Working temperature: -10 ~40
Storing temperature: -25 ~80
Environment humidity
/100Hz)
0.5dB
88mm
90%
2
3
PARAMETERS-UA2002
Stereo mode
Rated Power
Parallel mono mode
Bridged mono mode
4
950W
2
1500W
4
950W
2
1500W
8
1900W
4
3000W
THD
<0.05%(10%Rated power
Intermodulation
distortion
<0.1%(60Hz/7kHz,10%Rated power
Frequency response
20Hz~20kHz(+0/-0.25dB)
Phase difference
Damping factors
< 15
>800(8
Segregation
S/N
>75dB
>108dB(A-Weight)
Total gain
35.7
Difference of
Channel gain
<0.25dB
Input sensitivity
1V
Slew speed
Input impedance
>70V/ s
Unbalanced input 10k ,Balanced input 20k
Input connectors
Three pin XLR/6.35mm
Output connectors
Speakon binding post,NL4 speakon
Cooling
Four fans stepless shifting,
Cooling airflow from front to back
Controls on front panel
Switch of AC,Gain controlling knob for channel A and B
Controls on rear panel
Parallel/Stereo/Bridge, LF cutting,Grounding,Limit
Indicator on front panel
Yellow-Bridge,Red-Overload,Green-Signal
Amplifier protection
Short Circuit, Maladjustment of DC, Overload, Overheat ,Etc
Dimensions
Net weight
483 452
30kg
Power supply
AC 220-230V,50Hz/60Hz,1500VA
Environment
Temperature
Working temperature: -10 ~40
Storing temperature: -25 ~80
Environment humidity
/100Hz)
0.5dB
88mm
90%
3
3
PARAMETERS-UA1330
Stereo mode
Rated Power
Parallel mono mode
Bridged mono mode
8
660W
4
1000W
8
660W
4
1000W
16
1330W
8
2000W
THD
<0.05%(10%Rated power
Intermodulation
distortion
<0.1%(60Hz/7kHz,10%Rated power
Frequency response
20Hz~20kHz(+0/-0.25dB)
Phase difference
Damping factors
< 15
>800(8
Segregation
S/N
>75dB
>108dB(A-Weight)
Total gain
37.3
Difference of
Channel gain
<0.25dB
Input sensitivity
1V
Slew speed
Input impedance
>80V/ s
Unbalanced input 10k ,Balanced input 20k
Input connectors
Three pin XLR/6.35mm
Output connectors
Speakon binding post,NL4 speakon
Cooling
Four fans stepless shifting,
Cooling airflow from front to back
Controls on front panel
Switch of AC,Gain controlling knob for channel A and B
Controls on rear panel
Parallel/Stereo/Bridge, LF cutting,Grounding,Limit
Indicator on front panel
Yellow-Bridge,Red-Overload,Green-Signal
Amplifier protection
Short Circuit, Maladjustment of DC, Overload, Overheat ,Etc
Dimensions
Net weight
483 375
18kg
Power supply
AC 220-230V,50Hz/60Hz,1000VA
Environment
Temperature
Working temperature: -10 ~40
Storing temperature: -25 ~80
Environment humidity
/100Hz)
0.5dB
88mm
90%
4
3
PARAMETERS-UA1332
Stereo mode
Rated Power
Parallel mono mode
Bridged mono mode
4
660W
2
1000W
4
660W
2
1000W
8
1300W
4
2000W
THD
<0.05%(10%Rated power
Intermodulation
distortion
<0.1%(60Hz/7kHz,10%Rated power
Frequency response
20Hz~20kHz(+0/-0.25dB)
Phase difference
Damping factors
< 15
>800(8
Segregation
S/N
>75dB
>108dB(A-Weight)
Total gain
34.2
Difference of
Channel gain
<0.25dB
Input sensitivity
1V
Slew speed
Input impedance
>70V/ s
Unbalanced input 10k ,Balanced input 20k
Input connectors
Three pin XLR/6.35mm
Output connectors
Speakon binding post,NL4 speakon
Cooling
Four fans stepless shifting,
Cooling airflow from front to back
Controls on front panel
Switch of AC,Gain controlling knob for channel A and B
Controls on rear panel
Parallel/Stereo/Bridge, LF cutting,Grounding,Limit
Indicator on front panel
Yellow-Bridge,Red-Overload,Green-Signal
Amplifier protection
Short Circuit, Maladjustment of DC, Overload, Overheat ,Etc
Dimensions
Net weight
483 375
15kg
Power supply
AC 220-230V,50Hz/60Hz,1000VA
Environment
Temperature
Working temperature: -10 ~40
Storing temperature: -25 ~80
Environment humidity
/100Hz)
0.5dB
88mm
90%
5
3
PARAMETERS-UA660
Stereo mode
Rated Power
Parallel mono mode
Bridged mono mode
8
330W
4
500W
8
330W
4
500W
16
660W
8
1000W
THD
<0.05%(10%Rated power
Intermodulation
distortion
<0.1%(60Hz/7kHz,10%Rated power
Frequency response
20Hz~20kHz(+0/-0.25dB)
Phase difference
Damping factors
< 15
>800(8
Segregation
S/N
>75dB
>108dB(A-Weight)
Total gain
34
Difference of
Channel gain
<0.25dB
Input sensitivity
1V
Slew speed
Input impedance
>60V/ s
Unbalanced input 10k ,Balanced input 20k
Input connectors
Three pin XLR/6.35mm
Output connectors
Speakon binding post,NL4 speakon
Cooling
Four fans stepless shifting,
Cooling airflow from front to back
Controls on front panel
Switch of AC,Gain controlling knob for channel A and B
Controls on rear panel
Parallel/Stereo/Bridge, LF cutting,Grounding,Limit
Indicator on front panel
Yellow-Bridge,Red-Overload,Green-Signal
Amplifier protection
Short Circuit, Maladjustment of DC, Overload, Overheat ,Etc
Dimensions
Net weight
483 375
15kg
Power supply
AC 220-230V,50Hz/60Hz,500VA
Environment
Temperature
Working temperature: -10 ~40
Storing temperature: -25 ~80
Environment humidity
/100Hz)
0.5dB
88mm
90%
6
3
PARAMETERS-UA662
Stereo mode
Rated Power
Parallel mono mode
Bridged mono mode
4
330W
2
500W
4
330W
2
500W
8
660W
4
1000W
THD
<0.05%(10%Rated power
Intermodulation
distortion
<0.1%(60Hz/7KHz,10%Rated power
Frequency response
20Hz~20KHz(+0/-0.25dB)
Phase difference
Damping factors
< 15
>800(8
Segregation
S/N
>75dB
>108dB(A-Weight)
Total gain
31.2
Difference of
Channel gain
<0.25dB
Input sensitivity
1V
Slew speed
Input impedance
>50V/ s
Unbalanced input 10k ,Balanced input 20k
Input connectors
Three pin XLR/6.35mm
Output connectors
Speakon binding post,NL4 speakon
Cooling
Four fans stepless shifting,
Cooling airflow from front to back
Controls on front panel
Switch of AC,Gain controlling knob for channel A and B
Controls on rear panel
Parallel/Stereo/Bridge, LF cutting,Grounding,Limit
Indicator on front panel
Yellow-Bridge,Red-Overload,Green-Signal
Amplifier protection
Short Circuit, Maladjustment of DC, Overload, Overheat ,Etc
Dimensions
Net weight
483 375
12.5kg
Power supply
AC 220-230V,50Hz/60Hz,500VA
Environment
Temperature
Working temperature: -10 ~40
Storing temperature: -25 ~80
Environment humidity
/100Hz)
0.5dB
88mm
90%
7
3
PARAMETERS-UA330
Stereo mode
Rated Power
Parallel mono mode
Bridged mono mode
8
200W
4
300W
8
200W
4
300W
16
400W
8
600W
THD
<0.05%(10%Rated power
Intermodulation
distortion
<0.1%(60Hz/7kHz,10%Rated power
Frequency response
20Hz~20kHz(+0/-0.25dB)
Phase difference
Damping factors
< 15
>800(8
Segregation
S/N
>75dB
>108dB(A-Weight)
Total gain
32
Difference of
Channel gain
<0.25dB
Input sensitivity
1V
Slew speed
Input impedance
>50V/ s
Unbalanced input 10k ,Balanced input 20k
Input connectors
Three pin XLR/6.35mm
Output connectors
Speakon binding post,NL4 speakon
Cooling
Four fans stepless shifting,
Cooling airflow from front to back
Controls on front panel
Switch of AC,Gain controlling knob for channel A and B
Controls on rear panel
Parallel/Stereo/Bridge, LF cutting,Grounding,Limit
Indicator on front panel
Yellow-Bridge,Red-Overload,Green-Signal
Amplifier protection
Short Circuit, Maladjustment of DC, Overload, Overheat ,Etc
Dimensions
Net weight
483 310
11kg
Power supply
AC 220-230V,50Hz/60Hz,300VA
Environment
Temperature
Working temperature: -10 ~40
Storing temperature: -25 ~80
Environment humidity
/100Hz)
0.5dB
88mm
90%
8
3
PARAMETERS-UA332
Stereo mode
Rated Power
Parallel mono mode
Bridged mono mode
4
200W
2
300W
4
200W
2
300W
8
400W
4
600W
THD
<0.05%(10%Rated power
Intermodulation
distortion
<0.1%(60Hz/7kHz,10%Rated power
Frequency response
20Hz~20kHz(+0/-0.25dB)
Phase difference
Damping factors
< 15
>800(8
Segregation
S/N
>75dB
>108dB(A-Weight)
Total gain
29
Difference of
Channel gain
<0.25dB
Input sensitivity
1V
Slew speed
Input impedance
>50V/ s
Unbalanced input 10k ,Balanced input 20k
Input connectors
Three pin XLR/6.35mm
Output connectors
Speakon binding post,NL4 speakon
Cooling
Four fans stepless shifting,
Cooling airflow from front to back
Controls on front panel
Switch of AC,Gain controlling knob for channel A and B
Controls on rear panel
Parallel/Stereo/Bridge, LF cutting,Grounding,Limit
Indicator on front panel
Yellow-Bridge,Red-Overload,Green-Signal
Amplifier protection
Short Circuit, Maladjustment of DC, Overload, Overheat ,Etc
Dimensions
Net weight
483 310
11kg
Power supply
AC 220-230V,50Hz/60Hz,300VA
Environment
Temperature
Working temperature: -10 ~40
Storing temperature: -25 ~80
Environment humidity
/100Hz)
0.5dB
88mm
90%
9
3
PARAMETERS-UA880
Stereo mode
Rated Power
Parallel mono mode
Bridged mono mode
8
800W
4
1260W
8
800W
4
1260W
16
1600W
8
2560W
THD
<0.05%(10%Rated power
Intermodulation
distortion
<0.1%(60Hz/7kHz,10%Rated power
Frequency response
20Hz~20kHz(+0/-0.25dB)
Phase difference
Damping factors
< 15
>800(8
Segregation
S/N
>75dB
>108dB(A-Weight)
Total gain
38
Difference of
Channel gain
<0.25dB
Input sensitivity
1V
Slew speed
Input impedance
>80V/ s
Unbalanced input 10k ,Balanced input 20k
Input connectors
Three pin XLR/6.35mm
Output connectors
Speakon binding post,NL4 speakon
Cooling
Four fans stepless shifting,
Cooling airflow from front to back
Controls on front panel
Switch of AC,Gain controlling knob for channel A and B
Controls on rear panel
Parallel/Stereo/Bridge, LF cutting,Grounding,Limit
Indicator on front panel
Yellow-Bridge,Red-Overload,Green-Signal
Amplifier protection
Short Circuit, Maladjustment of DC, Overload, Overheat ,Etc
Dimensions
Net weight
483 452
25kg
Power supply
AC 220-230V,50Hz/60Hz,1200VA
Environment
Temperature
Working temperature: -10 ~40
Storing temperature: -25 ~80
Environment humidity
/100Hz)
0.5dB
88mm
90%
10
4
INSTALLATIONS
UA2000/UA2002/UA880:
Æ
Æ
Á
ø
·
÷
½
Ï
ò
433
ø
Á
÷
·
Ï
½
ò
m
.0m
76.2mm
446mm
441mm
435.7mm
430.5mm
46 5
44
m
.0m
42
5m
6m m
m
Æ
87.9
Á
ø
·
÷
Ï
½
ò
mm
ai
rf
lo
w
482
.4m
m
UA1330/UA660:
Æ
Æ
Á
ø
·
÷
Ï
½
ò
433
·
÷
Ï
½
ò
m
.0m
376mm
371mm
365.7mm
360.5mm
76.2mm
Á
ø
46 5
m
.0m
3
37 55m
6m m
m
Æ
87.9
mm
ai
11
rf
lo
w
482
.4m
m
ø
Á
÷
·
½
Ï
ò
4
INSTALLATIONS
UA1332/UA662:
Æ
Æ
Á
ø
·
÷
½
Ï
ò
433
ø
Á
÷
·
Ï
½
ò
m
.0m
376mm
371mm
365.7mm
360mm
46 5
m
.0m
76.2mm
3
37 5 5 m
6m m
m
Æ
87.9
Á
ø
·
÷
Ï
½
ò
mm
ai
rf
lo
w
48 2
m
.4m
UA332/UA330:
Æ
Æ
Á
ø
·
÷
½
Ï
ò
4 33
÷
·
Ï
½
ò
m
.0m
310mm
302.5mm
298mm
292.5mm
76.2mm
ø
Á
4 65
m
.0m
2
31 8 9 m
0m m
m
Æ
mm
87.9
ai
12
rf
lo
w
48 2
m
.4m
Á
ø
÷
·
½
Ï
ò
5
FRONT PANEL
4
5
3
-14
R
PRO DESIGN
-12
-10
-14
-8
-16
UA SERIES
-18
-12
-10
-16
-6
-8
-18
-6
BRIDGE
-20
-4
-20
-4
P E A K
-2
-24
SIGNAL
0
ON
-2
-24
0
CHA
CHB
POWER
BETA THREE
7
1
1
2
3
4
5
2
6
air input port
signal indicator of channel A
overload indicator of channel A
bridge indicator of channel
overload indicator of channel B
9
6
7
8
9
signal indicator of channel B
power switch
gain adjustment pots of channel A
gain adjustment pots of channel B
REAR PANEL
1
6
2
7
12
CHA
BRIDGE IN
!
-
A
+
INPUT
LF FILTER
MODE
PIN1:
SIGNAL GND
BRIDGE
50HZ
PIN2:
SIGNAL +
PARALLEL
25HZ
PIN3:
SIGNAL -
STEREO
5HZ
CLIPLIMITER
OFF
ON
ON
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CHA OUTPUT
GROUND
OFF
BRIDGE
6
8
UA2000
+
FUSE
Special design for big power£¡
OUTPUT ASSIGNMENT:
CHA: PIN 1+ : CHA SIGNAL
PIN 1 - : CHA GND
PIN 2+ : CHB SIGNAL
PIN 2 - : CHB GND
CHB
3
10
8
1
2
3
4
5
6
7
+
CHB: PIN 1+ : CHB SIGNAL
PIN 1 - : CHB GND
PIN 2+ :
PIN 2 - :
BRIDGE MONO OUTPUT:
CHA : PIN1+ : SIGNAL
4
B
-
POWER
CABLE
PIN2+ : GND
CHB OUTPUT
5
11
13
14
9
signal input of channel A(XLR JACK)
signal input of channel A(1/4 mic jack)
switch of working modes
limiters
signal output of channel B(binding post)
signal output of channel A(binding post)
fuse
13
8 signal input of channel B(XLR plug)
9 signal input of channel B(1/4 mic jack)
10 filter switch
11 grounding switch
12 signal output of channel A(NL4 JACK)
13 signal output of channel B(NL4 JACK)
14 cable
7
POWER SUPPLY
Please assure the local voltage comply with the voltage indicated on rear panel before
connecting power supply (AC 220-230V,50Hz/60Hz );
Please assure the cable and jack of power supply not damaged before connecting power
supply; Put off the plug after power off;
8
INPUT/OUTPUT CONNECTORS
Input connectors
The XLR jack and 1/4
microphone jack in same channel are paralleled;
Input the signal from either connectors and output the signal for connecting next amplifier;
If the amplifiers connected are too many, the sound quality may be affected;
Please do not input the signal from two connectors in same channel at the same time.
Output connectors
The binding post and NL4 jack in same channel of
UA series amplifier are paralleled;
Do not connect loads to the two connectors at the same time;
The red end of binding post is connected with anode of speaker, the black end connected
with cathode of speaker;
Only the load suited with the power and impedance of amplifier can be connected
with the output connectors of amplifier.
14
FUNCTION SETUP AND CABLE CONNECTING
As the below drawing, when the switch is ON, the limit is
on, if the input signal is too strong, the limit circuit can
control the gain and reduce the distortion, also control the
average output power, but it does not affect peak power,
protect the loudspeaker and assure the dynamic of music.
Note: Please set to "ON" position when using.
When LF cutting is at 50Hz,it equals discrete a 50Hz
high pass filter on input, the signal lower than 50Hz will
be accordingly attenuated, then can reduce the
noneffective swing and lower the distortion.
Like the right drawing:
OFF
OFF
ON
ON
LF FILTER
2> LF cutting setup:
CLIP
LIMITER
As the below drawing, when switch is OFF, the limit is off,
the limit circuit is out of work, if input signal is too strong,
output can cause clip distortion and also raise overload on
loudspeaker
CLIP
LIMITER
1> Limiter setup :
50HZ
25HZ
5HZ
+1
0dB
-1
-2
-3
-4
-5
-6 20
When LF cutting is at 25Hz, it equals discrete a 25Hz
high pass filter on input circuit, it just attenuate the signal
lower than 25Hz.
Like the right drawing:
30 40 50 60 80 100
200 300
LF FILTER
9
400 500 Hz
50HZ
25HZ
5HZ
+1
0dB
-1
-2
-3
-4
-5
-6
20
15
30 40 50 60 80 100
200
300
400 500 Hz
FUNCTION SETUP AND CABLE CONNECTING
+1
LF FILTER
When LF cutting is at 5Hz, the audio signal
can be amplified really.
Like the right drawing:
0dB
50HZ
-1
-2
25HZ
-3
-4
5HZ
-5
-6
20
30
40 50 60 80 100
200
300 400 500
Hz
3> Mode option and signal cable connection,
1
Like the right drawing:
3
2
TRS unbalanced
TRS asymetrique
TRS no balanceado
Unsymetriscbe jStereoklinke
XLR unbalanced
XLR asymetrique
unsymetri is che XLR
XLR no balanceado
Connecting direction:
Ground
1
2
3
Balanced
Symetrique
Symmetrisch
Balanceado
Asymetrique
Ground
Unsymmetrisch
non-inverting input +
Stereo connecting mode:
Put the switch of mode at stereo,
like the right picture:
non-inverting input +
No balanceado
MODE
A
Unbalanced
inverting input -
BRIDGE
PARALLEL
STEREO
Under the stereo mode, the signal on channel A and
channel B is independent, the signal to channel A is
just for channel A, the signal to channel B is only for
Channel B. Like the right drawing:
B
Mono paralleled mode:
Put the switch of mode at PARALLEL, like the
below picture:
Under the mono parallel mode, the effect of input
signal from channel A and channel B is same. The
signal on input channel A can be provided to output A,
also to output B. The signal on input channel B not only
provide to output A, also to output B, But please not
input the signal from channel A and B at the same time.
Note: The mono parallel mode just means the
parallel of input signal. Never parallel the output
terminals, Like the right drawing:
C
Bridged mode:
Put the switch of mode at BRIDGE, like the
right picture:
Under the bridged mono, signal just can be input from
channel A, no voice if input from channel B, the anode
of output A is the anode of bridged output, the anode
of output B is the cathode of bridged output.
like right drawing:
Under the bridge mode, The output voltage is so high enough to make a
electronic shock. Please power off the unit before operate it under bridge mode.
If need bridge operation under 4 please select UA2002
16
10
OPERATIONS
Please follow the steps during using the equipment
1> Start
a Setup thef unction a nd c onnection a ccording t o t he a bove f unctions etup a nd
connecting;
b Check if the output cable is short circuit and the load is too low;
c Check if the local voltage complies with the user's manual;
d Be sure the switch of power supply at "0" and the volume is the lowest;
e Connect the power supply, turn on the equipment of sound source, pre and effect
equipment and assure these equipments work in order;
f Turn on the switch of power supply(put it at"1"position);
g Adjust the knob of volume clockwise to right position.
2> Off
a Adjust the knob of volume unti-clockwise to the lowest;
b Turn off the switch of power supply on the front panel(put it at "0"position);
c Turn off the pre and effect equipments, sound source equipments;
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INDICATORS ON FRONT PANEL
1>If signal indicator flashes, it means if there is signal output in two channels;
2>If peak indicator flashes, it means that the input voltage is too high. You should turn
down the volume;
3>If the peak indicator always lights,it means faults.The reason is like this: loading is too
low,short on loading,temperature is too high.You should check it after power off. Turn
on again if no abnormity;
4>If bridge indicator lights, it means the amplifier is under the bridged mode.
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PROTECTION FUNCTION
Perfect protection function can prevent the damage for amplifier and speaker caused by
short circuit and output DC and overheat.
1>Short circuit protection: when the load at the output end is short circuit, the equipment
can cut off the signal and protect the equipment;
2>Output DC protection: when the equipment has faults and there is DC in output signal,
the equipment can cut off output automatically and avoid damage for speaker caused
by DC;
3>Overheat protection: If the temperature of heat sink is over the allowed temperature,
the sensor will cut off the output , avoid damage caused by high temperature and
protect the a mplifier.
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TROUBLES AND TROUBLE SHOOTINGS
Trouble
SN
Troublele shootings
1
Check if the power plug and jack are connected well.
2
If the power jack corresponds
with AC 220-230V,50Hz/60Hz .
3
Check if the fuse on rear panel is broken.
1
Check if the music signal cable is connected well.
2
Check if the power of music source is turned on and
the volume is turned on.
3
If the volume pots is turned on.
1
If the music source output is too big.
2
If the CLIP LIMITER is at the "ON"position.
3
Check if there is any short circuit in output
connectons and if the load is correct. The restart.
1
If the LF FILTER on rear panel is at the LF 50Hz or at
LF 25Hz, setup the switch at appropriate place.
1
Check if the switch of MODE on rear panel is
at the PARALLEL,please put it at PARALLEL if it not
at the position.
1
Check the input signal can comply with voltage,
please enhance the input signal if not sufficient.
2
Check if input SIGNAL voltage is suited, please
enhance the input SIGNAL if not sufficient.
Burning the fuse when start
1
Check the local voltage is same as the voltage of the
equipment.
Others
1
Check if the setup and connection are accordant with
the user manual.
No voice, Power indicator
lights off
No voice, Power indicator
Lights, Signal indicator
Light off
CLIP indicator last slighting
on, Voice is abnormal
The bass is not sufficient
No voice on one
channel under paralleled
mono mode
Output of bridge is too low
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User M anual
UA SERIES
PROFESSIONAL POWER AMPLIFIER
www.elderaudio.com
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