Pre; 5/6 Shift - Mackie 1604-VLZ PRO Owner's Manual

We recommend going into a stereo reverb in
mono and returning in stereo. We have found
that on most "stereo" reverbs, the second input
just ties up an extra aux send and adds nothing
to the sound. There are exceptions, so feel free
to try it both ways. Should you choose to use two
aux sends, use the "odd" AUX (1, 3 or 5) to feed
its left input and the "even" AUX (2, 4 or 6) to
feed the right input. Remember, if you're also
dealing with a stereo source signal, you'll want
to follow the sides — use the odd AUX on the
channel carrying the left side and the even AUX
on the channel carrying the right.

PRE

This switch determines the tap point of
AUX 1 and 2. Generally, "post" sends are used
to feed effects devices, and "pre" sends are
used to feed your stage monitors. See the "Pre
vs. Post" diagram below. AUX 3 through 6 are
always in post mode.
In post mode (switch up), AUX 1 and 2 will
follow the EQ, LOW CUT, fader and MUTE set-
tings. If you fade the channel, you fade the
send. This is a must for effects sends, since you
want the levels of your "wet" signals to follow
the level of the "dry."
INPUT TRIM INSERT
In PRE mode (switch down), AUX 1 and 2
follow the TRIM and LOW CUT settings only.
EQ, PAN, fader and MUTE settings have no ef-
fect on the PRE sends. This is the preferred
method for setting up stage monitor feeds —
they'll be controlled independently of the fader
and mute moves.

5/6 SHIFT

Don't let the fact that there's only four AUX
knobs per channel fool you — the 1604-VLZ
PRO has six AUX SENDs. With the 5/6 SHIFT
switch up, the knobs labeled AUX 3 and AUX 4
deliver their signals to AUX SEND 3 and 4 out-
puts. With the shift switch down, the signals
appear at the AUX SEND 5 and 6 outputs.
We recommend that AUX SEND 3 and 4 be
patched into your "utility" effects, like a short re-
verb and slap delay; effects you use all the time.
Use AUX SEND 5 and 6 for "exotic" effects, like
harmonizers and multi-tap delays; they are not
likely to be used as often.
Pre Vs. Post
MUTE
LOW
EQ
CUT
'PRE' SIGNAL
PAN
FADER
'POST' SIGNAL
PRE SWITCH
TRIM
U
AUX
1
2
3
4
EQ
200
LOW CUT
75 Hz
18dB/OCT
PAN
MUTE
ASSIGN
AUX 1
AUX 2
21
1
0 60
+15dB -45dB
U
+15
O O
U
+15
O O
PRE
U
5
+15
O O
U
6
+15
O O
5/6
SHIFT
HI
U
12k
-15 +15
U
MID
-15 +15
800
2k
100 8k
LOW
U
80Hz
-15 +15
L R
1
OL
- 20
SOLO
1 – 2
3 – 4
L - R
O O