Mackie ProFX12 User Manual download pdf (Page 28)

ProFX8 and ProFX12

Mackie Stereo Inputs and Returns: Mono,

Stereo, Whatever

Stereo line inputs and stereo returns are a ﬁne

exampleoftheMackiephilosophy(whichwejustmade

up)ofMaximumFlexibilitywithMinimumHeadache.

The inputs and returns will automatically be mono or

stereo,dependinguponhowyouusethejacks.Here’s

how it works:

A mono signal should be patched into the input or

return jack labeled left (mono). The signal will be

routed to both the left and right sides of the return

circuit, and will show up in the center of the stereo pair

of buses it’s assigned to, or it can be “panned” with the

pan control.

A stereo signal, having two plugs, should be patched

into the left (mono) and the right input or return jacks.

A jack switch in the right jack will disable the mono

function, and the signals will show up in stereo.

A mono signal connected to the right jack will show

up in the right bus only. You probably will only want to

use this sophisticated effect for special occasions.

TRS Send/Receive Insert Jacks

Mackie’ssingle-jackinsertsarethethree-conductor,

TRS-type1⁄4"phone.Theyareunbalanced,buthave

both the mixer output (send) and the mixer input

(return) signals in one connector. See Figure E.

The sleeve is the common ground (earth) for both

signals. The send from the mixer to the external unit is

carried on the tip, and the return from the unit to the

mixer is on the ring.

Using the Send only on an Insert Jack

IfyouinsertaTS(mono)1⁄4"plugonlypartially(to

therstclick)intoaMackie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 or bus 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 Figure F.

NOTE: Do not overload or short-circuit the signal you

are tapping from the mixer. That will affect the internal

signal.

“tip”

This plug connects to one of the

mixer’s Channel Insert jacks.

“ring”

tip

ring

sleeve

SEND to processor

RETURN from processor

(TRS plug)

Figure E

Direct out with no signal interruption to master.

Insert only to first “click.”

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

STEREO

PLUG

Figure F

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Mackie ProFX12 User Manual Page 28

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