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THE FSM 8PLUS

Introduction

The FSM 8PLUS is a 9 channel stereo mixer, 1 channel is a stereo priority input the other 8

channels are usually configured as 4 stereo channels (Music section) and 4 balanced mono

input channels (Microphone section).

Music and microphone sections each have their own bass and treble equalisation (tone

controls). All inputs have pre-set gain controls on the rear panel.

The mono inputs are factory set for microphones but an internal jumper allows a line input, there

are also jumpers for phantom power if required.

Two of the stereo channels (channels 5 and 6) may be set to operate as low Z balanced

microphone inputs to give up to 6 microphone inputs, two sets of input connectors, phono

sockets and XLR's are provided on these channels, selection is by dip switches on the rear

panel. Channels 5 and 6 may be set (internally) to use the microphone or music equalisation

path to the output.

Channel 1 (microphone) and channel 7 (music) have their normal inputs on the rear panel and

switching jack inputs on the front panel. This allows a microphone or music source to be

plugged into the front panel without having to access or disconnect the corresponding

connection to the rear panel.

The stereo priority input is typically a jukebox, which when playing will automatically mute the

other music inputs. The sensitivity of this is internally adjustable.

Any number of channels can be sent to a buss by operating a push switch above that channels

volume control, this buss may operate as headphone monitoring or an auxiliary buss. The send

can be internally set for either pre or post fade (volume control).

The mode of operation (headphone monitoring or auxiliary buss) for each channel is selected by

internal jumpers (can be a mix of auxiliary and monitor settings).

In headphone monitoring mode the selected inputs can be monitored via the ¼" stereo phones

jack, in auxiliary mode the selected inputs are available as an output on 2 pins of a 3 way

connector on the rear panel. The master output can be monitored on the headphones by

operating the push switch above the master volume control (this operates whether auxiliary or

monitor is selected for the inputs). Headphone impedance must be no less than 32 Ohms.

A mute facility is provided on two pins of a back panel connector, when these pins are

connected together the music is muted (microphones are not affected), this may be interfaced

to a fire alarm.

A voice over facility is enabled by a push button on the front panel that automatically reduces

the music level when the microphones are used, the sensitivity and music attenuation of this is

internally adjustable.

There is a balanced stereo output (can be strapped for unbalanced use) on XLR's, the output

may be set internally for mono output. A bass output is available on 2 pins of a 3 way connector,

the output level may be increased by 6dB by an internal jumper.

Factory setting for the FSM 8PLUS is 4 microphone (channels 1-4) and 4 stereo inputs

(channels 5-8), phantom power off, channels 1-4 set for auxiliary post fade, channels 5-8 set for

monitor pre fade, bass set for normal output level and main output set for stereo.