Altec Lansing 3300A - Manual (Page 5)

Operating Instructions for the Altec Lansing 3300A Series Mixing Consoles
2. EQ Controls: Equalization can
be more simply described as so­
phisticated tone control. The
EQ circuits used in the 3300A
series
have a substantial
amount of sound shaping
capability.
This wide range ceui be a bonus
when dealing with widely-
varying instrument signals, poor
acoustics or other problems. The
EQ should be used sparingly,
however, for the best results.
Too liberal use of the EQ can
cause phasing problems, add
noise, and use up a lot of ampli­
fier power.
2A- HIGH EQ: The high EQ
circuit is a shelving type
filter at 10 kHz with a ±15
dB rzuige. It controls the
treble content of the input
signal Turning the control
counterclockwise decreases
the amount of treble,
clockwise increases it.
2B. MID EQ: The mid EQ cir­
cuit is a peaking type filter
with a ±15 dB range. It
controls the midrange con­
tent of the input signal.
Turning the control coun­
terclockwise decreases the
amount of midrange, clock­
wise increases it.
2C. MID Frequency: The mid
frequency circuit controls
the frequency range from
300 Hz to 5 kHz of the
MID EQ control. By vary­
ing the FREQUENCY, dif­
ferent tonal perspectives
can be created. The sweep-
able frequency gives much
more control flexibility.
2D. LOWEQ: The low EQ cir­
cuit is a shelving type filter
at 100 Hz with a ±15 dB
range. It controls the bass
content of the input signal.
Turning the control coun­
terclockwise decreases the
amount of bass, clockwise
increases it.
8. MONITOR Send: The monitor
send control sets the level of
that input signal in the monitor
mix. It is independent of all
input channel controls except
the TRIM control. It is not
affected by the channel EQ
controls or slide fader. Thus, it
is independent of, zmd not
affected by, changes in the main
or house mix.
4. AJJX Sends: Ilie AUX 1 send
control sets the level of that
signal in the AUX 1 mix and is
{x>st-fader, which means that it
is affected by the gain setting of
the fader. The AUX 1 send may
also be used as a mono send for
recording.
The AUX 2 send control sets the
level of that input signal in the
AUX 2 mix and is switchable
PRE or POST fader. In the PRE
position, it serves as another
MONITOR OUT, and in the
POST position, another
EFFECTS OUT.
5. PAN Control: Short for "pan­
oramic potentiometer", this con­
trol allows the channel’s input
signal to be placed within the
stereo image by assigning more
or less of the signal to the left or
right subgroup controls. Turn­
ing the panpot to the left of
center moves the apparent
source toward the left channel.
Turning the panpot to the right
of center moves the apparent
source towzird the right channel.
Centering the control makes the
apparent source centered be­
tween the channels. If all inputs
are panned center, the result is
mono.
Some users p>an all the instru­
ments to one side and the vocals
to the other and use the sub­
group controls to valance them.
6. PFL: PFL(pre-fader listen)
allows the open : to preview
any pre-fader sij, individually
or in combinaLi- through the
headphone out . To activate
the PFL simply ' >press the ap­
propriate switcl: The status
indicator will . iit indicating
which pre-fader signals are be­
ing monitored. hen the PFL
circuit is engag ' by depressing
a PFL switch, ^ th the right
meter and the headphone circuit
will monitor the audio level of
the selected cha;:ael(s).
In the normal position (all PFL
switches off), tile right meter
monitors the METER switched
bus, and the headphone circuit
monitors the out put of the SUB
L and SUB outputs. The
audio level of ,.he headphone
jack is controlled by the
PHONES conlrri.
7. Channel PEA^ LED: The
channel PEAK I j ED monitors
the input channel circuit for
clipping or overload (both before
and after the EQ section). If it
lights, the sign;:, is bordering on
distortion. 'Ihis will be heard in
the output as aarsh, blaring
sound on voiame peaks. This
might be caused by excessive
boost in he channel
equalization controls, or a TRIM
control setting that is too high
for the input signal Generally,
readjusting the TRIM control
will
cure '.is undesired
condition.
8. Channel Fader: The slide
fader controls the output level of
the channel as it is fed to the
subgroups. Tl.;: control should
be normally set around the "0"
mark (nomiiia. level). At this
point, the signal level is high
enough to K.eep noise from
creeping in and low enough to
insure plenty of headroom and
ALTEC LANSING* CORPORATION • a Mark IV Company