Specifications

Line switches the microphone input to
line
input
on
the
channel.
The line input
has
its own balanced input amp and is
corrtrolled by
the active
(dual)
gain
contnol.
The GAIN control is the
single
most important conttol on the con-
sole.
With this corrtrol accumtely set, it is
possible
to
achieve
the
very
best signal to noise tatio and maximum headroom tequired
for
high
quahty
life sound. This conmol is for adjusting the line
/
mic
input and has seperate electronics although only one lcrob ad-
justs
the
dual
pot.
Phase
is used to leverse the
phase
of any mike
/
line input coming
from
a mike or signal that may be out
of
phase
with other
rnikes
or
signals.
A successful method of
checking
for
*out
of
phase"
sig-
nals is
to
pan
both signals to the centre and llisten closely to the
mix. If an
unexpected
sound is heard
or
if something appears to be
missing
ftom
the mix,
depress
the
phase
switches for
those
chan-
nels
suspected to be
in
error. If the sound improves, then
that chan-
nel was out
of
phase
with the others.
If
using
multiple mikes on the same signal, such as
drums,
vocals,
homs,
sftings
etc., it
is
possible
to create an acoustical
phase
can-
cellation. In rnost cases,
physically
moving
the mikes a
few inches
will
correct this
phase
cancellation.
3.3
THE EQU
LLIZER SECTTON
Just
ahead
the equalizet section there
is a
variable 12
dB VCVS
high
pass
filter
with a Butterworth
cunre
rarrging
ftorn
2O
Hz
to
IWIz switchable
in or out of the
circuit
independant
of equalizer
on/off
switching.
The four-band
pararnetric
equallzer
is
unique
in
its
design.
There
are four bands, the high
and
low
are
sweepable
frequency
with
shelving
characteristics
with
a
boost
or cut
of 16 dB
and the two
rnid
bands
each
sweepable with a boost
or
cut of
16
dB. The HMF
(High
/
I\fid Frequency) and LMF
(Low
1tvfid
Frequency) can be
switched to
a nalrower bandwidth frorn
Ll3
to 2 octaves.
The HF
(htgh
frequency)
section
is a variable
frequency
shelving
type sweepable
frorn
2,000 Hz
to
20,000 Hz
with a rnaxirnurn
boost or cut
of 16
dB.
The
LF
(ow
frequency)
section
is
a varible frequency shelving
type sweepable
frorn 2O
Hz
to 500
Hz with a
rnaxirnurn
boost crr
cut of
16
dB.
The HMF
(High
/
Mid
Freq.) section
has
level
and frequency con-
ttols and is
a
constant
Q
type,
therefore
the
bandwidth setting will
rnatch
that
of the
level
control.
The frequency
ranges
ftorn 5OO Hz
to
10,000
Hz and
has a rnaxirnun boost
or
cut
of 16
dB. The
bandwidth is
switchable
between Ll3
and
2 octaves.