The 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 diagram 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-conductor 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 lightup when the cable is wired correctly, for the various cable configurations that the CBT-375 can test.

Easy Cable Testing

Use this device to instantly test the working status of your audio cable instead of having to manually switch out multiple cables to determine which one isn't working.

Compatibility

The unit can be used to test RCA, 1/4", 3.5mm, XLR, Speakon, and Banana audio cables.

LEDs

LED indicators provide an instant visual cue regarding line status.