All in one audio line tester/generator/intercom Since its introduction in 1997 the Qbox has become one of Whirlwind's most successful "Black Boxes" ever.. The Qbox is the all-in-one audio line tester... View more
Speaker tester with pink noise generator, Speakon, XLR, and banana outputs, DC Ohms test, LED impedance display, battery-powered, compact design, and polarity check. The Whirlwind Cab Driver is a... View more
