16
10. Trouble shooting
You can check some operation problems as mentioned below first before asking for help.
Problem Problem cause(s) Suggested remedy
4. Power did not turn
on
4. Turn on the power.
5. Loose connection of
the power cord
5. Make sure the power cord is connected firmly to the mains
supply before turn on the power of amplifier.
No response
when power
on
6. blown fuse
6. Turn off the power, and then check the fuse on the rear panel
or the fuse on the power amplification PCB. Replace the fuse
with same type only if the fuse is blown.
6. No signal input
5. Connect the signal source equipment to the amplifier, and then
turn on the power.
7. Loose connection of
the speaker or
damaged speaker
6. Make sure the speaker is well connected. Check if the speaker
is in good condition.
8. Wrong connection
7. Make sure the connection between amplifier and speaker is
correct. Please refer to the point 8 Connection (signal output)
for more information.
9. Thermal protection
8. Avoid overloading the amplifier for a long time, or working in a
bad ventilation area. Check if the fans work properly or the
ventilation slots are clear of dust.
No sound
10. The low cut switch is
not at the right
position
5. Ensure that the low cut switch is positioned either completely to
the left or right side otherwise no sound will be outputted.
1. The signal input level
(intensity) is set at
minimum
1. Adjust the signal input level to the appropriate intensity
Inadequate
output
volume
2. Low input voltage of
the signal source
equipment
2. a. Increase the input voltage of the signal source equipment
b. Adjust the input sensitivity of the amplifier.
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11. Specifications
Model No. ALPHA 01 ALPHA 02 ALPHA 03 ALPHA 04
Output Power Stereo 8Ω 130W×2 200W×2 250W×2 340W×2
1KHZ Stereo 4Ω 200W×2 300W×2 400W×2 550W×2
Bridge 8Ω 400W 600W 800W 1100W
THD+N ≤0.1% (Stereo 8Ω )
IMD
＜0.1% (Stereo 8Ω )
Frequency Response 20Hz~20KHz +0dB, -1.0dB
Input Sensitivity 0.775V/1.0V/1.44V (Stereo 8Ω)
S/N ratio
(A Weighted RMS) >100dB (Stereo 8Ω )
Crosstalk at rated power output
(8Ω1KHz)
>65dB (Stereo 8Ω )
Phase Response +15°, -15°(Stereo 8Ω )
Damping Factor >80( @8Ω ) >150( @8Ω ) >150( @8Ω )
Soft start up, Short CircuitOverloaded, Overheat
Protection
DC fault, AC line fuse Limit
Indicators
3 LED power， signal ，limit protection
IN: 1/4( 6.3) Stereo Phone-Jack / XLR female
Connectors
OUT: 3×Speakon
Slew rate >20V/ms
Power supply 230V/50Hz
Dimension(W×D×H) 483×235×44mm 483×323×44mm 483×403×44mm
Weight 4.1Kg 6.4Kg 8.3Kg
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