Mackie CR1604 Owner's Manual download pdf (Page 42)

42

APPENDIX B: CONNECTIONS

“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 po-

larity) side of the audio signal and pin 3

wired to the “low” (“cold” or negative polar-

ity) side of the signal (Figure A). All totally

aboveboard and in full accord with the hal-

lowed 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.

2

2

3

1

1

SHIELD

COLD

HOT

SHIELD

COLD

HOT

3

SHIELD

COLD

HOT

3

2

1

SLEEVE

TIPSLEEVE

TIP

RING

RING

TIP

SLEEVERING

Figure B:

1

⁄

4

" TRS Plugs

Figure A: XLR Connectors

1

⁄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

TIP

TIPSLEEVE

TIP

SLEEVE

Figure C: TS Plug

sleeve to ground (earth). Mackie mixers do

not directly accept 1-plug-type stereo

microphones. They must be separated into a

left cord and a right cord, which are plugged

into the two mic preamps.

You can cook up your own adapter for a

stereo microphone adapter. “Y” two cables

out of a female

1

⁄

4

" TRS jack to two male

XLR plugs, one for the Right signal and one

for the Left.

• 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).

1

⁄4" TS PHONE PLUGS AND JACKS

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

tions available on a “mono”

1

⁄

4

" phone jack or

plug (Figure C). TS jacks and plugs are used

in many different applications, always unbal-

anced. The tip is connected to the audio signal

and the sleeve to ground (earth). Some ex-

amples:

• Unbalanced microphones

• Electric guitars and electronic instruments

• Unbalanced line-level connections

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