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U.40d 4-Channel Mic/Line Mixer
U.420d 4-Channel Mic/Line Mixer
Appendix B: Connections
XLR Connectors
The mixer’s combo inputs accept 3-pin male XLR con-
nectors. These are wired as follows, according to stan-
dards specified by the AES (Audio Engineering Society).
2
2
3
1
1
SHIELD
COLD
HOT
SHIELD
COLD
HOT
3
SHIELD
COLD
HOT
3
2
1
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
TIPSLEEVE
TIP
RING
RING
TIP
SLEEVERING
1/4
"
TRS Balanced Mono Wiring:
Sleeve = Shield
Tip = Hot (+)
Ring = Cold (–)
Stereo Headphones
SLEEVE
TIPSLEEVE
TIP
RING
RING
TIP
SLEEVERING
1/4
"
TRS Stereo Unbalanced Wiring:
Sleeve = Shield
Tip = Left
Ring = Right
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
TIPSLEEVE
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.
TI
P
SLEEVE
TIPSLEEVE
RCA Unbalanced Wiring:
Sleeve = Shield
Tip = Hot (+)
10.0 in/
254 mm
9.4 in/
239 mm
3.7 in/
94 mm
WEIGHT
3.0 lb
1.36 kg
Dimensions