Marshall Amplification PA400 Front Panel, Channels, Channel 7 tape channel, Master Section

PA400 FRONT PANEL

PA400 Front Panel

Functions.

Channels 1-6

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.

3-5. Bass, Middle and Treble EQ controls- 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.

9

8

7

6

5

4

3

2

1

16

15						17
14
13
12
24	23	22	21	20	19	18
11
10
25	26	27	28	29	30	31

Channel 7 (tape channel).

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.

Master Section.

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.