Mostec Mini Preamp 01 Series Manual

Mostec – Mini Preamp (series 01) – Operators guide
Making connections
The diagram below shows the connections on the back panel of the pre-amp.
Moving from left to right, each connection will now be described
230 AC Input - IEC
A standard IEC (kettle pl g) lead sho ld be sed to apply power to the nit. The f se
holder is located j st next to the mains inp t socket. If the f se needs to be replaced a
315mA anti s rge (slow blow) type sho ld be sed.
Mi ed output – 6.3mm mono jack socket
This socket provides a mixed signal o tp t, combining the three signals (bass, mids,
and tops) from the crossover. Use this socket to connect a tape deck or similar
recording device. If the preamp is to be sed with a single amplifier then connect the
amplifier to this socket.
Treble output – 6.3mm mono jack socket
Use this socket to feed a signal to an amplifier that is connected to tweeters or similar
high freq ency speakers. This socket may also be linked to the mids o tp t ( sing
s itable adapters or leads) to provide a signal consisting of midrange and treble.
Mids output – 6.3mm mono jack socket
Use this socket to feed a signal to an amplifier that is connected to midrange
freq ency speakers. This socket may also be linked to the treble o tp t ( sing s itable
adapters or leads) to provide a signal consisting of midrange and treble.
Bass output – 6.3mm mono jack socket
Use this socket to feed a signal to an amplifier that is connected to woofers or similar
low freq ency speakers. This socket may also be linked to the mids or treble o tp t
b t this s al not req ired in most set- ps.
Line input – 6.3mm stereo jack socket
Use this socket to connect the o tp t of a mixer or similar device to the preamp. If a
stereo jack socket is sed then the signals will be combined into a mono signal
Mic input – 6.3mm mono jack socket
Use this socket to connect a low impedance microphone to the preamp.
Mic
Input
Line
Input
Bass
Output
Mids
Output
Tops
Output
Mi ed
Output230V AC Input

Mostec – Mini Preamp (series 01) – Operators guide
Using the unit
The diagram below shows the layo t of the front panel.
Moving from left to right, each control will now be described
Mic Volume, Mic Bass, Mic Treble
These three controls adj st the level and the so nd of the microphone signal. No other
control on the front panel affects the microphone signal
7 Band Graphic Equaliser
These 7 controls affect the so nd of the signal fed to the line inp t.
Parametric Frequency
The preamp contains a parametric circ it to f rther enhance the so nd of bass
freq encies. T rning the control clockwise will mean that higher bass freq encies are
boosted. T rning the control anti-clockwise will mean that lower bass freq encies are
boosted.
Bass Volume
This control affects the level of signal that is fed to the bass o tp t. This control does
not affect any microphone signals, which as also fed to the bass o tp t
Mids Volume
This control affects the level of signal that is fed to the mids o tp t. This control does
not affect any microphone signals, which as also fed to the mids o tp t
Treble Volume
This control affects the level of signal that is fed to the treble o tp t. This control
does not affect any microphone signals, which as also fed to the treble o tp t
Above each of these three vol me controls are ‘kill’ switches that allow each of the
freq ency ranges to the switched on (down position) or off ( p position). These
switches do not affect any microphone signals.
Applying power
Also located on the front panel is a green power LED. This will be ill minated as
soon as mains power is applied. The preamp also feat res relay m ting. All o tp ts
will be m ted for approximately 4 seconds when power is first applied. This is to
prevent any npleasant noises from being fed to any attached amplifiers. When power
is removed, the relay operates to m te the o tp ts.
Mic
Volume
Mic
Bass
Mic
Treble 30 Hz 150 Hz 330 Hz 1 KHz 2.5 KHz 7 KHz 15 KHz
Parametric
Frequency
Bass
Volume
Mids
Volume
Tops
Volume
Power
7 Band graphic Equaliser
Kill switches