Goldline APT2B Polarity/Phase Analyzer Tester Set (with Balanced I/O)

Goldline's Polarity/Phase Analyzer utilizes state-of-the-art signal processing to accurately determine absolute polarity which is unimpaired by passive crossovers or signal waveform distortions produced by the device under test. The APT2 works on tweeters, mid-ranges, woofers, subwoofer speakers and cabinets, equalizers, amplifiers and crossovers. With this handy instrument an entire speaker system can be checked in only seconds.  The Polarity/Phase Detector (APT) and Pulse Generator (PG) are supplied as separate units.The APT2B offers all the features and convenience of the original APT2 plus balanced outputs and inputs.