Mackie 1640 User Manual download pdf (Page 26)

ONYX 1640

Appendix B: Connections

1/4"

TS Phone Plugs and Jacks

“TS” stands for Tip-Sleeve, the two connection points

available on a mono 1/4

phone jack or plug. They are

used for unbalanced signals.

SLEEVE

TIP

SLEEVE

TIP

SLEEVE

1/4

TS Unbalanced Wiring:

Sleeve = Shield

Tip = Hot (+)

RCA Plugs and Jacks

RCA-type plugs (also known as phono plugs) and jacks

are often used in home stereo and video equipment and

in many other applications. They are unbalanced and

electrically equivalent to a 1/4

TS phone plug.

SLEEVE

TIPSLEEVE

RCA Unbalanced Wiring:

Sleeve = Shield

Tip = Hot (+)

Unbalancing a Line

In most studio, stage, and sound reinforcement situ-

ations, there is a combination of balanced and unbal-

anced inputs and outputs on the various pieces of

equipment. This usually will not be a problem in making

connections.

• When connecting a balanced output to an unbal-

anced input, be sure the signal high (hot) connec-

tions are wired to each other, and that the balanced

signal low (cold) goes to the ground (earth)

connection at the unbalanced input. In most cases,

the balanced ground (earth) will also be connected

to the ground (earth) at the unbalanced input. If

there are ground-loop problems, this connection

may be left disconnected at the balanced end.

XLR Connectors

Channels 1-16 use 3-pin female XLR connectors on the

MIC inputs. They are wired as follows, according to stan-

dards speciﬁ ed by the AES (Audio Engineering Society).

SHIELD

COLD

HOT

SHIELD

COLD

HOT

SHIELD

COLD

HOT

XLR Balanced Wiring:

Pin 1 = Shield

Pin 2 = Hot (+)

Pin 3 = Cold (–)

1/4" TRS Phone Plugs and Jacks

“TRS” stands for Tip-Ring-Sleeve, the three connection

points available on a stereo 1/4

or balanced phone

jack or plug. TRS jacks and plugs are used for balanced

signals and stereo headphones:

Balanced Mono

SLEEVE

TIP

SLEEVE

TIP

RING

TIP

SLEEVERING

1/4

TRS Balanced Mono Wiring:

Sleeve = Shield

Tip = Hot (+)

Ring = Cold (–)

Stereo Headphones

SLEEVE

TIP

SLEEVE

TIP

RING

TIP

SLEEVERING

1/4

TRS Stereo Unbalanced Wiring:

Sleeve = Shield

Tip = Left

Ring = Right

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Mackie 1640 User Manual Page 26

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