DSPPA MP6425 User manual

1
Professional Public Address System
MP6425
MP6438
MP6450
Power Amplifier
USER MANUAL
Before operating, please read this manual completely

2
GuangZhou DSPPA Audio Co., Ltd.
http：//www.dsppatech.com
FEATURES:
 Transformer isolated 100V, 70V and 4Ω outputs, balanced, no grounding.
 5 LED indicators for status display .
 XLR socket and 6.3 mm jack for amplifier link.
 Short circuit output protection & LEDdisplay.
 Series amplifiers of high output poweravailable.
 Support both AC power and DC 24V power supply

3
FRONT PANEL:
1. AC power indicator
2. Unit’s Fan Intake Window
3. PROTECTION LED Indicator (DC
fault or short circuit output protection
Indication)
4. TEMPERATURE LED Indicator(high
temperature indication, >90 )
5. CLIP LED Indicator (Please reduce
the gain to prevent severely clipped
Wave forms reaching the
loudspeakers)
6. Power output LED Indicator (Output
level)
REAR PANEL:
Notice: Input 3 and 13 are prior to other inputs.
1. Fan Exhaust Window
2. 100V Signal Input
3. XLR InputSocket(Priority)
4. XLR InputSocket(Program)
5. XLR link OutputSocket(Pre.out)
6. COM output terminal

4
7. 4Ω output terminal
8. 70V output terminal
9. 100V output terminal
10. 24V DC fuse-B Parallel
(Connection）
11. AC Power Swich
12. Input signal gain control
13. 6.3mm input socket(withpriority)
14. XLR input socket(with Program)
15. Pre. Out signal gaincontrol
16. 6.3mm Link output socket(with
Pre. Out)
17. 24V DC Input Terminal
18. 24V DC fuse-C Parallel
19. 240V AC Power cord
20. 240V AC fuse

5
OPERATION:
Make certain that speakers and input sources are properly connected before switching on.
Keep volume level turned down to minimum before switching on.
Protection LED Indicator lights on while operation when faults happen. Switch off the apparatus
immediately and correct the faults before switching on.
INPUT CONNECTION:
The Input sockets/terminals are on the rear
panel under the label “IN”. There are three inpu
ways: 100v input terminal, two XLR input
sockets (figure 1), and two 6.3mm RCA input
sockets.
Positive
Negative Input
OUTPUT CONNECTION: Figure 1 3-pin XLR Input Sockets
Speaker output terminals are on the rear panel. The terminal under the label “COM” is
COMMON. The terminals under the labels “4Ω, 70V, 100V” are Hot. The connection ways
should be COM-4Ω / COM-70V / COM-100V.
Normally the “rated power” (70V / 100V) output terminal is used in output connection. The
connected speaker should be with a transformer, and the gross power of speakers should be
less than the rated power of the amplifier.
“Rated Impedance”(4～16Ω) output terminal can be used when speakers are fixed closely, and
the gross impedance of speakers should be 4～16Ω.
2
1

6
XLR terminal or 6.3mm RCA terminal under the label “OUT” is line output terminal.
NOTE：
 Only choose one pair of terminals for speakerconnection.
 Never connect two Hot terminals (labeled 4Ω, 70V, 100V)together.

7
SPECIFICATIONS
Model MP6425 MP6438 MP6450
Rated Power 250W RMS 380W RMS 500W RMS
Input sensitivity 1V
S/N Ratio >85dB
Frequency Response 80Hz～16kHz / ±3dB
THD 4
Ω
/1kHz <0.5 %
Cooling Style 12V DC Fan
Indicators Power: Red, Clip: Red”, Sound: Green, Protection: Red,
Temperature: Orange
Protection Turn on delay, thermal, DC fault, short circuit
220V AC Fuse F6AL F8AL F10AL
24V DC Fuse
FB15AL/FC10AL FB/FC: 15AL FB/FC: 20AL
Power Supply AC220V / 50-60Hz 24V DC
Power Consumption 500W 760W 1000W
Dimension 88×483×390mm
Gross Weight 17kg 19.3kg 20.6kg
Net Weight 16kg 18.3kg 19.5kg
Specifications are subject to change without notice.
Guangzhou DSPPA Audio Co., Ltd.
CAUTION
● For safety, when “Power switch” is off, please detach the power plug from the
receptacle.
● The apparatus shall not be exposed to dripping or plashing and no objectsfilled
with liquids, such as vases, shall be placed on the apparatus.
●
To reduce the risk of electric shock, do not remove thecover.

8