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Power Amplifier with DC Power

MP6438 250W 70V-100V-4Ω Power Amplifier
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.

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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 & LED display.

Series amplifiers of high output power available.

Support both AC power and DC 24V power supply


Description

This amplifier is designed for commercial and industrial public address applications. Rack mount design in 2U type and rated power is 380W.

Both balanced and unbalanced line inputs are available for each channel. Balanced line output feeds to another power amplifier as well as secures the signal transmission is less noise and longer distance. 70V, 100V and 4Ω speaker outputs are convenient for installation when selection different speaker matching. A master volume control is included. Complete protection includes clip, short circuit, high temp and overload. With indications for power, signal, clip, protection and temp.


Specification

Model

MP6438

Rated Power

380W

Input sensitivity

1V

S/N Ratio

>90dB

Frequency Response

80Hz-16kHz/±3dB

THD 4/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

F8AL

24V DC Fuse

FB/FC: 15AL

Power Supply

AC220V/50-60Hz 24V DC

Power Consumption

760W

Dimension

88*483*390mm

Gross Weight

19.3kg

Net Weight

18.3kg


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.


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.

XLR terminal or 6.3mm RCA terminal under the label “OUT” is line output terminal.


NOTE:

Only choose one pair of terminals for speaker connection.

Never connect two Hot terminals (labeled 4Ω, 70V, 100V) together.


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