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CONSTANT LOUDNESS ! ! !
The CR1604-VLZ’s
PAN
controls employ a design
called “Constant Loudness.”
It has nothing to do with
living next to a freeway. As you turn the
PAN
knob from left to right (thereby causing the
sound to move from the left to the center to
the right), the sound will appear to remain at
the same volume (or loudness).
If you have a channel panned hard left (or
right) and reading 0dB, it must dip down about
4dB on the left (or right) when panned center.
To do otherwise, like those Brand X mixers,
would make the sound appear much louder
when panned center.
3-BAND MID-SWEEP EQ
The CR1604-VLZ has a 3-band, mid-sweep
equalization:
LOW
shelving at 80Hz,
MID
sweep
peaking from 100Hz to 8kHz, and
HI
shelving at
12kHz. It’s probably all the EQ you’ll ever need!
(Shelving means that the circuitry boosts or
cuts all frequencies past the specified frequency.
For example, the CR1604-VLZ’s
LOW EQ
boosts
bass frequencies starting at 80Hz and continu-
ing down to the lowest note you never heard.
Peaking means that certain frequencies form a
“hill” around the center frequency.)
The
LOW EQ
provides up to 15dB boost or cut
at 80Hz. The circuit is flat (no boost or cut) at the
center detent position. This frequency represents
the punch in bass drums, bass guitar, fat synth
patches, and some really serious male singers.
20Hz 100Hz 1kHz 10kHz 20kHz
–15
–10
–5
0
+5
+10
+15
Used in conjunction with the
LOW CUT
switch , you can boost the
LOW EQ
without
injecting a ton of subsonic debris into the mix.
We recommend using the
LOW CUT
feature on
all channels, except low frequency signals, like
kick drums and bass guitars.
The
MID EQ
, or “midrange,” has a fixed
bandwidth of 1.5 octaves. The
MID
knob sets
the amount of boost or cut, up to 15dB, and is
effectively bypassed at then center detent. The
frequency knob sets the center frequency,
sweepable from 100Hz to 8kHz.
come on as a result of clipping. That’s pretty
boring. So, to liven things up, this LED will
glow steadily when that channel’s
MUTE
switch is engaged.
If you need a quick reference to these LEDs,
write this on the back of your hand:
name color flickering glowing
–20 (SOLO) green signal is present channel is soloed
OL (MUTE) red channel is clipping channel is muted
MUTE
Engaging a channel’s
MUTE
switch pro-
vides the same results as turning the fader all
the way down: Any channel assignment to
L-R
,
1-2
or
3-4
will be interrupted. All the post
AUX
sends will be silenced, as will the
DIRECT OUT
signals on channels
1
through
8
. And of course, that fun-loving
OL
(
MUTE
)
LED will commence to glow. The
PRE AUX
sends , channel
INSERT
send and
SOLO
(in
LEVEL SET (PFL)
mode) will continue to
function during
MUTE
.
Depending on the audio content in a chan-
nel, engaging its
MUTE
switch may cause a
slight popping sound. This is not a problem
within the mixer, and it can be avoided: Sim-
ply engage the
LOW CUT
switch on each
channel (unless its low frequency content is
vitally important, such as a kick drum or bass
guitar).
LOW CUT
eliminates subsonic de-
bris, which causes the pop, and its effect is
usually transparent.
PAN
PAN
adjusts the amount of channel signal
sent to the left versus the right outputs. Pan de-
termines the fate of the
L-R
assignment,
subgroups
1–2
and
3–4
, and the
SOLO
(in
LEVEL SET (PFL)
mode). With the
PAN
knob
hard left, the signal will feed the left
MAIN L-R
MIX
, subgroup
1
, subgroup
3
and left
NORMAL
(AFL)
solo mode (assuming their assignment
switches are engaged). With the knob hard
right, signal feeds the right
MAIN L-R MIX
, sub-
group
2
, subgroup
4
and right
NORMAL (AFL)
solo mode. With the
PAN
knob set somewhere
in-between left and right, the signal will be di-
vided between the left and right busses.
Stereo Sources
Your life will be easier if you follow this
standard convention: When patching stereo
sound sources to a mixer, always plug the left
signal into an “odd” channel (
1
,
3
,
5
, etc.) and
the right signal into the adjacent “even” chan-
nel (
2
,
4
,
6
, etc.). Then pan the odd channel
hard left and the even channel hard right.
PAN
AUX
3
1
2
EQ
5
4
6
5/6
SHIFT
PRE
TRIM
1
SOLO
L - R
3
–
4
1
–
2
OL
-
20
U
OO
+15
U
OO
+15
U
OO
+15
U
+15-15
U
+15-15
800
2k200
8k
U
+15-15
12k
HI
MID
80Hz
LOW CUT
75 Hz
18dB/OCT
LOW
10 0
U
OO
+15
1
MUTE
M
I
C
G
A
I
N
10
U
60
+10dB -40dB
-
1
0
d
B
V
LR
OO