Trident 68
Owners Manual
7
Trident 68
Input Channel Equaliser
HIGH Frequency
Section
Adjusts the high frequency shelving
EQ response. The Level control ad-
justs the cut/boost b/- 15dB
of the selected “knee” frequency, this
frequency is selectable between 1KHz
and 15KHz. The centre “0” position of
the Level control has a detent to in-
dicate that it is having no effect on
the associated channel signal. Cut
or boost of the high frequency level
control is usually used for minor tonal
adjustments.
LOW Frequency
Section
Adjusts the low frequency shelv-
ing EQ response. The Level control
adjusts the cut/boost b/-
15dB of the selected “knee” frequen-
cy, this frequency is selectable be-
tween 40Hz and 650Hz. The centre
“0” position of the Level control has
a detent to indicate that it is having
no effect on the associated channel
signal. Cut or boost of the low fre-
quency level control is usually used
for minor tonal adjustments.
INSERT ON
When depressed, this switch places the
rear panel channel insert path to the
Insert Send and back from the Insert
Return in line with the signal path. This
insert point by default is after the chan-
nel EQ. By routing the signal through
this connector, the insert may be used
for applications such as an effect that
can be switched in/out. In the event the
user wants to patch in his/her favourite
external EQ, it can be connected with
its input fed from the Insert Send and its
output feeding the Insert Return, this
path being activated with this switch.
It could be used in conjunction with or
without the Trident EQ.
Channel Equaliser
A three band Trident EQ with
overlapping frequency ranges is provided
along with a switchable high pass filter. The
HIGH and LOW sections of the equaliser
have a shelving response and the
MID has a peaking (bell) response with
two selectable bandwidth settings.
HPF
When selected this applies a high-pass
(or Low- Cut) filter with a corner fre-
quency 50Hz and a roll off rate of 18dB
per octave into the signal path. This
control is used to remove unwanted
signal content below 50Hz. The result
is usually improved signal quality of the
associated input signal while decreas-
ing the low frequency amplification
demand of the audio systems amplifier
and speaker combination. Mainly for
use with microphones, this helps re-
move low frequency rumble and han-
dling noise.
EQ IN
This switch inserts the 3-band EQ and
High Pass Filter into the channel/mon-
itor (see EQ TO MON switch descrip-
tion below) signal path. When not in
use, it is suggested that the EQ be kept
in the OUT position for best phase per-
formance.
MID Frequency Section
Adjusts the mid frequency EQ peaking
response. The Frequency control se-
lects the centre frequency of the fil-
ter (between 200Hz and 3kHz) and
the Level control adjusts the cut/
boost b/- 15dB. The centre
“0” position of the Level control has
a detent to indicate that it is having
no effect on this frequency band. The
bandwidth of this filter is approxi-
mately one octave. With the addition
of the Q switch, the bandwidth can
be reduced to 1/3 octave. The high-
mid frequency controls are used for
minor tonal adjustment.
