Whirlwind SC4BRJ NL/EP Tester - Speaker Checker 27 Pin Insulation resistance: > 500 M

Insulation resistance: > 500 M

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Whirlwind SC4BRJ NL/EP Tester - Speaker Checker 27 Pin Insulation resistance: > 500 MWhirlwind SC4BRJ NL EP Tester Speaker Checker Whirlwind SC4BRJ Tester provides rapid, positive testing for multiline speaker cables. Rotating the central switch applies voltage to the cable conductors one at a time. A SEND LED indicates the pin to which the voltage is being applied, and a RECEIVE LED indicates where it returns. This system clearly reveals, shorts, opens, and cross wires, allowing you to test common combinations of speaker cables.