Lo-trim control
The LO- TRIM control is for adjusting the bass end of the instruments sound. This is a BOOST
and CUT type of control i.e. its FLAT (no EQ) position is in its central position with BOOST when
the control is turned to the right and CUT when turned to the left.
The range and effect of this control has been tailored to best suit the requirements of an acoustic
instrument. In use try not to add too much BOOST as this increases the possibility of feedback
from the body of the instrument.
Always start with this control set to its central or FLAT position and get to know the amplified flat
sound of your instrument well before starting to add any equalisation.
Hi-trim control
The HI-TRIM control is for adjusting the treble end of the instrument sound. This is a BOOST and
CUT type of control i.e. its FLAT (no EQ) position is in its central position with BOOST when the
control is turned to the right and CUT when turned to the left.
The range and effect of this control has been tailored to best suit the requirements of an acoustic
instrument.
Always start with this control set to its central or FLAT position and get to know the amplified flat
sound of your instrument well before starting to add any equalisation.
Notch control
The NOTCH is a special type of control that removes a narrow band of frequencies from the audio
spectrum. The band of frequencies removed is kept very narrow so as not to unduly effect the
sound of the instrument. The NOTCH control adjusts where in the audio range this band of
frequencies is placed and within this unit the adjustable range has been optimised for acoustic
guitar.
This is an extremely useful device for an acoustic guitar as it allows the natural body resonance of
the instrument to be ‘Tuned Out’ which in turn enables a far higher level of amplification to be
achieved before feedback. The NOTCH may be switched ‘in’ and ‘out’ with the switch adjacent to
the NOTCH control.
To use the NOTCH facility to its best advantage first of all switch it ‘out’ of circuit, turn up the
MASTER LEVEL control until the instrument starts to feedback (it is very often the ‘A’ string that
goes first), switch the notch ‘in’ and adjust the NOTCH control until feedback either goes away or
is reduced. This is the optimum position for your instrument.
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