Trident 88
Owners Manual
7
Trident 88
Input Channel Mic/Line Options
Mic Gain
This control adjusts the amount
of gain of the signal connected
to the MIC XLR / 1/4” combination
connector. For low impedance
balanced microphones plugged
into the XLR, the gain varies
from +5dB minimum to approx-
imately +60dB. For a line level
device plugged into the 1/4”
part of the MIC combination
connector, the gain varies from
-15dB to +40dB,
eff
ectively pro-
viding a 20dB pad to the micro-
phone preamp.
Note: This gain is independent
from the Line gain.
Line Gain
This control adjusts the amount
of gain of the signal connected
to the TRS LINE Jack.
MIC INSERT
Selects between the Mic input source
on the XLR / 1/4” combination
connector and the line level in-
put (labeled Ext MIC) that feeds
the channel. This allows the user
to connect a line source (exter-
nal mic preamp) and be able to
bypass the channel Mic preamp
stage or switch between them.
+48V
When depressed, provides +48
volt phantom power to the XLR
portion of the MIC input con-
nector. Note: +48V will NOT ap-
pear on the 1/4” part of the MIC
input connector. Phantom pow-
er is required for operation of
many condenser microphones.
See your microphone instruc-
tions to see if phantom power
is required or is to be defeated
(some - though few – micro-
phones require phantom pow-
er NOT to be activated or they
may be damaged).
I/P Rev
The Input Reverse switch when
depressed flips the Line Input
signal and the Monitor Input
signals. In
eff
ect this switch de-
termines the Line Input source
that is available to the channel.
Combining this with the Line
switch above allows the user to
source the channel signal from
the channel Monitor Return TRS
jack and to use the full channel
strip resources for the Monitor
Return signal. Alternatively de-
pressing this switch selects the
Line Input TRS source for the
channel Monitor section.
Line Switch
When depressed, it switches source
from Line Input to Mic Input.
POL
When depressed, reverses the
electrical input polarity of any
microphone or line level input
signal selected as the channel
source. Use of this control may
alter the sound quality of a input
relative to other channels when
multiple microphones are pick-
ing up the same sound.
CHAN MTR
This button selects the signal that is
fed to the relevant channel meter sit-
uated on the meter bridge. In the up
position the channel Direct Output
feed is displayed.
[The channel Direct Output can be
user defined by a selectable option on
the Input module, it can be selected
either channel post fader or channel
Insert Return (signal appearing on ring
contact of channel INSERT TRS jack.]
When this button is depressed the
channel meter is fed from the signal on
the channel MONITOR I/P TRS jack.
In a multi-track studio environment
where the channel Direct Output is
fed to the recording device and the
output of this device is connected to
the MONITOR input, it is possible to
see on the channel meter what is sent
to or received from the recording de-
Trident 88
Input Channel Group Assignment
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