B
O
T
T
O
M
B
O
T
T
O
M
T
O
P
T
O
P
LEFT SIDE
RIGHT SIDE
LEFT SIDE
RIGHT SIDE
LEFT SIDE
RIGHT SIDE
LEFT SIDE
RIGHT SIDE
(BOTTOM)
1/4” TS
MONO
XLR MALE
SPEAKON
DUAL
BANANA
XLR FEMALE
(BOTTOM)
RCA
(BOTTOM)
RCA
(BOTTOM)
1/4” TS
MONO
(TOP)
1/4” TRS
STEREO
(TOP)
3.5MM
STEREO
T
he diagram at the right shows the orientation
of the jack bays on the CBT-375. Notice that
the BOTTOM 1/4” Jacks are MONO TS
(tip/sleeve) jacks. The TOP 1/4” Jacks are
STEREO TRS (tip/ring/sleeve). Please notice also
that the XLR Female jack is on the LEFT SIDE,
and the XLR Male jack is on the RIGHT SIDE.
The LED lights on the top panel are referenced to
the jacks on the RIGHT SIDE of the tester (see dia-
gram above).This means that the “H C S and G”
LED green and red lights refer to “HOT, COLD,
SHIELD and GROUND” of the jack on the RIGHT
SIDE. (Or, when testing speaker cables that have
Speakon plugs, the LED lights refer to the “+1, -1,
+2, -2” contacts of the Speakon plug connected to
the RIGHT SIDE.) Why is this distinction important?
The reason is that many cable assemblies use
three-or-four-conductor plugs at one end (TRS 1/4”,
TRS 3.5mm, XLR or Speakon) and only two-con-
ductor plugs at the other end (TS 1/4”, RCA,
banana, etc.) It will be less confusing, therefore,
when connecting such cables, to always connect
the end of the cable with more than two contacts to
the jacks on the RIGHT-SIDE. The exception would
be a cable with a Male XLR plug, since the only
Female XLR jack on the CBT-375 is on the Left
Side. Diagrams that follow show which LEDs light-
up when the cable is wired correctly, for the various
cable configurations that the CBT-375 can test.
GOOD TEST
GOOD TEST
GOOD TEST
TS 1/4” (MONO or UNBALANCED)
TRS 1/4” (STEREO or BALANCED)
RCA
SIDE-PANEL JACK BAYS
top jacks
bottom jack
bottom jack
Unlike the unbalanced 1/4” plugs, RCA’s are referenced to the
H and
S
S LEDs due to internal bussing requirements in the tester.
