Marshall Amplification PA400 Manuale Utente

1. Low impedance XLR input - For the

connection of low impedance

microphones.

2. High impedance Jack input - For the

connection of high impedance

microphones. Also suitable for acoustic
instruments with transducer type
pick-ups.

A wide range of tonal adjustment can be

selected using combinations of these
controls. 

6. Monitor level - Provides the volume level

adjustment from the channel to the
monitor section.

7. Effects Level - Provides level adjustment

of the signal from the channel to effects
units linked through the master effects

loop.

8. Reverb Level - Allows the level of the

built in reverb to be adjusted on the

channel.

9. Volume control - This allows the

individual volume level of the channel to
be adjusted.

10. Tape inputs - Phono (RCA) sockets to

accept the signal from tape or CD
players.

11. Tape outputs - Phono (RCA) sockets to

provide connection out to cassette or
other recording equipment.

12. Recording level control - Provides level

control of the output to external recording
equipment.

13- 14. Bass and Treble EQ controls - A

wide range of tonal adjustment can be
selected using combinations of these

controls. 

15. Monitor control - Controls the level of

the tape signal to the monitor output.

16. Volume control - Provides level control

of the tape channel output.

17. 9 Band Graphic Equalizer - Provides

master EQ control across the audio
spectrum. This feature is particularly

useful for "shaping" the sound to achieve
peak performance in rooms of different
size and texture.  Adjustment of -12 to

+12 dB is provided at 63Hz, 125Hz, 250
Hz, 500 Hz, 1 K Hz, 2 K Hz, 4 K Hz, 8 K
Hz and 16 K Hz. The slider tips are

loaded with an LED to provide the
display of graphic "shapes", even on
darkened stages.

18. Master Volume control - Controls the

overall volume level of the amplifier. 

19. Master Reverb control - Provides the

overall level control of the reverb.

20. Effects Return control - Controls the

level of the signal returning to the
PA-400 from external effects processors

which would be linked through effects
loop sockets (26 & 27).

21. Effects Send control - Controls the level

of the signal from the PA-400 to the input
of external effects processors.

22. Monitor output control - Controls the

level of the output from monitor socket
(25) to drive a separate monitor power amp.

23. Effects to Monitor control - Provides

level adjustment of the effects return into

the monitor mix.

24. Reverb to Monitor control - Provides

level adjustment of the reverb into the

monitor mix.

25. Monitor output - Jack socket for

connection to power amplifier driving the
monitor system.

26. Effects Send - Jack socket for connection

to the input of external effects processors.

27. Effects Return - Jack socket which

accepts the signal from the output of
external effects processors.

28. Footswitch socket - For connection of a

two way (FS02) switch for reverb on/off
and effects loop in/out. If a single

footswitch is used, the reverb only will be
switched.

29. Pre-amp output - Provides a signal

directly out from the pre-amp (also mutes
the power amp) allows external
processing of signal which can then be

returned to Power Amp in socket (30). 

30. Power Amp input - Provides a direct

input to the power amp stage of the
PA-400. Also acts as the effects return for
series connected processors linked via

socket (29).

31. Slave output - Sends out an overall

signal from the mixer section, suitable for

driving extra power amps, if the system
needs to be extended.

32. Mains switch - Mains on/off switch
33. Mains Input- Socket to accept the mains

power lead supplied. (note: please ensure
that correct wiring practices have been
observed before use).

34-35. Loudspeaker outputs - Jack sockets

for the connection of loudspeaker

systems. The power output is 400 Watts
into 2 Ohms. Under no circumstances
should a total loudspeaker load of less

than 2 Ohms be connected.

3 pin XLR balanced input.

-50dBm.

10K 

Ω.

2 pole jack unbalanced 

input.

-30dBm.

1 M 

Ω.

+/- 12dB @ 100 Hz.

+/- 12dB @ 600 Hz.

+/- 12dB @ 10KHz.

33K 

Ω.

-20dBm.

+/- 12dB @ 100Hz.

+/- 12dB @ 10 KHz.

0 dBm.

500 

Ω

.

9 band giving +/- 12dB @ 

centre frequencies of 

63Hz, 125Hz, 250Hz. 

500Hz, 1KHz, 2KHz, 

4KHz, 8KHz and16KHz.

0dBm nominal.

500 

Ω

.

Effects input sensitivity impedance -10dBm.
Effects input impedance

10K 

Ω.

0dBm nominal.

500 

Ω

.

0dBm nominal.

500 

Ω

.

400 Watts into 2 

Ω.

300 Watts into 4 

Ω.

200 Watts into 8 

Ω.

+/- 10mV.

+/- 0.5dB 10Hz -20KHz.

Greater than -100dB.

2 

Ω

or greater.

Open circuit, short circuit, 

load mismatch and over 

temperature protection.

0dBm for 400W into 2 

Ω

.

47K 

Ω

.

50V /µS.

The PA-5400 has a built in cooling fan to ensure reliable operation

under the most arduous conditions. The fan will switch on when

the internal temperature exceeds 60°C and will automatically turn

off again when the temperature drops below 55°C.