Mackie ONYX 1640I Owner's Manual download pdf (Page 29)

Owner's Manual 29

“XLR” Connectors

Mackiemixersuse3-pinfemale“XLR”connectorson

all microphone inputs, with pin 1 wired to the grounded

(earthed) shield, pin 2 wired to the “high” (”hot” or

positive polarity) side of the audio signal and pin 3

wired to the “low” (“cold” or negative polarity) side of

the signal. See Figure A.

Use a male “XLR”-type connector, usually found on the

nether end of what is called a “mic cable,” to connect to

a female XLR jack.

⁄4" TRS Phone Plugs and Jacks

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

connections available on a “stereo”

⁄4" or “balanced”

phone jack or plug. See Figure B.

TRS jacks and plugs are used in several different

applications:

• Balancedmonocircuits.Whenwiredasa

balanced connector, a 1⁄4" TRS jack or plug

is connected tip to signal high (hot), ring to

signal low (cold), and sleeve to ground (earth).

• StereoHeadphones,andrarely,stereo

microphones and stereo line connections.

When wired for stereo, a 1⁄4" TRS jack or plug is

connected tip to left, ring to right and sleeve to

ground(earth).Mackiemixersdonotdirectly

accept 1-plug-type stereo micro phones. They

must be separated into a left cord and a right

cord, which are plugged into two mic preamps.

Appendix B: Connections

• UnbalancedSend/Returncircuits.Whenwired

as send/return “Y” connector, a 1⁄4" TRS jack

or plug is connected tip to signal send (output

from mixer), ring to signal return (input back

into mixer), and sleeve to ground (earth).

⁄4" TS Phone Plugs and Jacks

“TS” stands for Tip-Sleeve, the two connections

available on a “mono” 1⁄4" phone jack or plug. See

FigureC.

TS jacks and plugs are used in many different

applications, always unbalanced. The tip is connected to

the audio signal and the sleeve to ground (earth). Some

examples:

• Unbalancedmicrophones

• Electricguitarsandelectronicinstruments

• Unbalancedline-levelconnections

• Speakerconnections

Don’t use guitar cords for speaker cables!

They’re not designed to handle speaker-level

signals and could overheat.

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 (Figure D).

They are unbalanced and electrically identical to a

1⁄4"TSphoneplugorjack.SeeFigureC.Connectthe

signal to the center post and the ground (earth) or

shield to the surrounding “basket.”

SLEEVE

TIP

TIPSLEEVE

TIP

SLEEVE

TIPSLEEVE

TIP

RING

TIP

SLEEVERING

Figure C: TS Plug

SHIELD

COLD

HOT

SHIELD

COLD

HOT

SHIELD

COLD

HOT

Figure A: XLR Connectors

SLEEVE

TIP

TIPSLEEVE

TIP

SLEEVE

TIPSLEEVE

TIP

RING

TIP

SLEEVERING

Figure B:

⁄4" TRS Plugs

TIPSLEEVETIPSLEEVE

Figure D: RCA Plug

Figure E: Does not appear in this owner's manual, due

to a contractual obligation, but performs nightly at the

downtown Woodinville Cocoa Rooms and Tea Bar

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Mackie ONYX 1640I Owner's Manual Page 29

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