MACKIE 1640 - Manual (Page 21)

21
Owner’s Manual
Owner
’s Manual
Here are three ways you use the INSERT jacks: Note: You can safely plug this output into a micro-
phone input that provides 48 V phantom power.
54. MAIN OUT
These 1/4" TRS output connectors provide balanced
or unbalanced line-level signals. This is the same signal
that appears at the XLR MAIN OUTPUTS [52] (except
the 1/4" jacks are not affected by the MAIN OUTPUT
LEVEL switch). Connect these to the next device in the
signal chain like an external processor (graphic equal-
izer or compressor/limiter), or directly to the inputs of
the main amplifi er.
55. MONO OUT
This 1/4" TRS output connector provides a balanced
or unbalanced line-level signal that is a combination
of the left and right MAIN OUT signals (L+R). You can
use this for a separate mix that doesn’t require a stereo
feed, or to simply test the monaural compatibility of
your stereo mix.
56. MONO OUT LEVEL Control
This is a separate level control for the MONO OUT. It
comes after the MAIN MIX fader but before the MAIN
OUTPUT LEVEL switch, so turning the MAIN MIX fader
up and down does affect the MONO OUT signal. With
this control turned all the way up, you’ll have 6 dB of
extra gain at the MONO OUT.
57. MAIN INSERTS
These 1/4" TRS jacks are for connecting serial effects
such as compressors, equalizers, deessers, or fi lters. The
insert point is after the mix amps, but before the MAIN
MIX fader. Refer to the description of the channel insert
on the previous page to see how to make this connection.
58. TAPE IN/OUT
These RCA jacks are used to connect to the inputs and
outputs of a tape recorder or other recording device.
The TAPE IN jacks accept an unbalanced signal from
a tape recorder or other signal source (could be a CD
player, if you want) using standard hi-fi hookup cables.
The signal is routed to the CONTROL ROOM/PHONES
SOURCE matrix [18]. Push in the TAPE button to route
the tape input to the CONTROL ROOM and PHONES
outputs [59/30]. This allows you to playback recordings
of your mixes.
Push in the TAPE TO MAIN MIX button [23] to route the
tape input to the MAIN OUTs [52/54]. This allows you to
playback music between sets over the main PA speakers.
Direct out with no signal interruption to master.
Insert only to first “click.”
Channel Insert jack
Channel Insert jack
Channel Insert jack
Direct out with signal interruption to master.
Insert all the way in to the second “click.”
For use as an effects loop.
(TIP = SEND to effect, RING = RETURN from effect)
MONO PLUG
MONO PLUG
STEREO
PLUG
51. TALKBACK MIC
This is where you plug in your external talkback
microphone if you need to have one. This female XLR
connector has +48 VDC phantom power always applied,
so you can use dynamic or condenser microphones.
Note: Almost all dynamic microphones can be used with
phantom power, but you might want to check the docu-
mentation that came with your microphone to be sure.
52. RIGHT/LEFT MAIN OUTPUTS
These male XLR connectors provide a balanced line-
level signal that represent the end of the mixer chain,
where your fully mixed stereo signal enters the real
world. Connect these to the inputs of your main power
amplifi ers, powered speakers, or serial effects processor
(like a graphic equalizer or compressor/limiter). It pro-
vides a fully balanced signal that is the same as the 1/4"
TRS MAIN OUT jacks next door (except the 1/4" jacks
are not affected by the MAIN OUTPUT LEVEL switch).
53. MAIN OUTPUT LEVEL
When this switch is out (+4 dB), the XLR MAIN
OUTPUTS provide a +4 dBu line-level signal. When the
switch is pushed in (MIC), the signal is attenuated by
40 dB to a microphone level. You can connect the XLR
MAIN OUTPUTS to the microphone inputs of another
mixer, providing a submix for keyboards or drums, for
example, in a live sound application.