Mackie ProFX12 User Manual download pdf (Page 27)

Owner’s Manual

“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. This is all totally aboveboard

and in full accord with the hallowed standards dictated

by the AES (Audio Engineering Society).

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”1⁄4"or“balanced”

phone jack or plug. See Figure B.

TRS jacks and plugs are used in several different

applications:

• 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 the two mic

preamps.

Appendix B: Connections

• 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).

• 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

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: 1⁄4" TRS Plugs

TIPSLEEVETIPSLEEVE

Figure D: RCA Plug

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Mackie ProFX12 User Manual Page 27

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