Owner`s manual

14 Onyx Blackjack
“XLR” Connectors
Mackie interfaces 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.
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:
• 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).
Appendix B: Connections
• 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 interfaces 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.
• 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 interface), ring to signal return (input
back into interface), and sleeve to ground
(earth).
1
⁄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.
2
2
3
1
1
SHIELD
COLD
HOT
SHIELD
COLD
HOT
3
SHIELD
COLD
HOT
3
2
1
Figure A: XLR Connectors
SLEEVE
TIP
TIPSLEEVE
TIP
SLEEVE
SLEEVE
TIPSLEEVE
TIP
RING
RING
TIP
SLEEVERING
Figure B:
1
⁄4" TRS Plugs
SLEEVE
TIP
TIPSLEEVE
TIP
SLEEVE
SLEEVE
TIPSLEEVE
TIP
RING
RING
TIP
SLEEVERING
Figure C: TS Plug