Stereo Line Inputs / 9. Insert - Mackie ProFX8v2 Owner's Manual

TRS jacks and plugs are used for balanced signals and
stereo headphones and are wired as follows according
to standards specified by the AES (Audio Engineering
Society):
1/4" TRS Balanced Mono Wiring:
Sleeve = Shield (ground)
Tip = Positive (+ or hot)
Ring = Negative (– or cold)
To connect an unbalanced line to this input, use
a 1⁄4" mono (TS) phone plug or instrument cable.
They are wired as follows, according to standards
specified by the AES (Audio Engineering Society):
1/4" TS Unbalanced Mono Wiring:
Sleeve = Shield (ground)
Tip = Positive (+ or hot)
The channel 1 line-level input on the
ProFX8v2 and ProFX12v2 may also accept
instrument-level signals if the hi-z switch
is engaged. This allows you to connect guitars directly
into channel 1 without the need for a DI box.
8. Stereo Line Inputs
The stereo line inputs are designed for 1/4" TRS
balanced or 1/4" TS unbalanced signals. They may
accept any line-level instrument, effects device, CD
player, etc.
Level control is available –20 dB to +20 dB.
If you are connecting a mono source, use the left
(mono) input, and the mono signals will appear
on both sides of the main mix.
The first two stereo channels of each ProFXv2
Series mixer are hybrid channels, each with a mic
input XLR jack and low cut switch. Here the gain
control only affects the mic input.
Hybrid Channels:
• ProFX8v2 – Channels 3/4 and 5/6
• ProFX12v2 – Channels 5/6 and 7/8
• ProFX16v2 – Channels 9/10 and 11/12
• ProFX22v2 – Channels 15/16 and 17/18
• ProFX30v2 – Channels 23/24 and 25/26
10
ProFX8v2 • ProFX12v2 • ProFX16v2 • ProFX22v2 • ProFX30v2
RING SLEEVE SLEEVE RING TIP
TIP
RING
TIP
SLEEVE
SLEEVE SLEEVE TIP
TIP
TIP
SLEEVE
9. Insert
These unbalanced 1/4" jacks are for connecting
serial effects processors such as compressors,
equalizers, de-essers, or filters.
The insert point is after the gain control and low
cut filter, but before the channel's EQ and level.
The channel signal can go out of the insert jack
to an external device, be processed and come back
in on the same insert jack.
To do this requires a standard insert cable that must
be wired thusly:
Tip = send (output to effects device)
Ring = return (input from effects device)
Sleeve = common ground
ring
(TRS plug)
tip sleeve
This plug connects to one of the
mixer's Channel Insert jacks.
Insert jacks may be used as channel direct outputs;
post-gain, and pre-EQ. If you insert a TS (mono)
1⁄4" plug only partially (to the first click) into an insert
jack, the plug will not activate the jack switch and will
not open the insert loop in the circuit (thereby allowing
the channel signal to continue on its merry way through
the mixer).
This allows you to tap out the channel signal without
interrupting normal operation.
If you push the 1⁄4" TS plug in to the second click,
you will open the jack switch and create a direct out,
which does interrupt the signal in that channel.
See illustration below.
Do not overload or short-circuit the signal
you are tapping from the mixer. That will
affect the internal signal.
MONO PLUG
Direct out with no signal interruption to master.
Insert only to first "click."
MONO PLUG
Direct out with signal interruption to master.
Insert all the way in to the second "click."
STEREO
PLUG
For use as an effects loop.
(TIP = SEND to effect, RING = RETURN from effect.)
SEND to processor
tip
ring
RETURN from processor
Channel Insert jack
Channel Insert jack
Channel Insert jack