Mackie ONYX 1640I Owner's Manual download pdf (Page 30)

30 Onyx 1640i

TRS Send/Receive Insert Jacks

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

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

both the mixer output (send) and the mixer input

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

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 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 G.

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 F

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 G

DB25 Connectors

The Recording Outs on the back of the Onyx 1640i

provide balanced direct outputs for channels 1-16 on

two female DB25 connectors. These connectors are

pin-for-pin compatible with the analog (not TDIF) DB25

connectorsfoundonTASCAMDTRSrecorders,which

has become an industry standard for many professional

audio manufacturers. They are also the same pinout

astheanalogcardsfortheMackieD8Bandharddisk

recorders.

Several companies make DB25-to-DB25 cables

speciﬁcally for audio, with proper shielding to reduce

crosstalk and noise.

DB25 cables that break out to XLR, 1/4" TRS, or

TT connectors for connecting to other mixers or audio

geararealsoreadilyavailable.SeeyourMackiedealer

for details.

Pin 1 + Ch 8 Ch16

Pin 2 shield Ch 8 Ch16

Pin 3 – Ch 7 Ch15

Pin 4 + Ch 6 Ch14

Pin 5 shield Ch 6 Ch14

Pin 6 – Ch 5 Ch 13

Pin 7 + Ch 4 Ch 12

Pin 8 shield Ch 4 Ch 12

Pin 9 – Ch 3 Ch 11

Pin 10 + Ch 2 Ch 10

Pin 11 shield Ch 2 Ch 10

Pin 12 – Ch 1 Ch 9

Pin 13 N/C

Signal

Description

REC OUTS

1-8

REC OUTS

9-16

REC OUTS

1-8

REC OUTS

9-16

Pin 14 – Ch 8 Ch16

Pin 15 + Ch 7 Ch15

Pin 16 shield Ch 7 Ch15

Pin 17 – Ch 6 Ch14

Pin 18 + Ch 5 Ch 13

Pin 19 shield Ch 5 Ch 13

Pin 20 – Ch 4 Ch 12

Pin 21 + Ch 3 Ch 11

Pin 22 shield Ch 3 Ch 11

Pin 23 – Ch 2 Ch 10

Pin 24 + Ch 1 Ch 9

Pin 25 shield Ch 1 Ch 9

Signal

Description

12345678910111213

141516171819202122232425

HOT

COLD

GROUND

HOT

COLD

GROUND

HOT

COLD

GROUND

HOT

COLD

GROUND

HOT

COLD

GROUND

HOT

COLD

GROUND

HOT

COLD

GROUND

HOT

COLD

GROUND

CH 1

CH 9

N/C

CH 2

CH 10

CH 3

CH 11

CH 4

CH 12

CH 5

CH 13

CH 6

CH 14

CH 7

CH 15

CH 8

CH 16

Figure H

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Mackie ONYX 1640I Owner's Manual Page 30

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