FOSGATE FOZGOMETER AZIMUTH RANGE METER
The Fosgate Fozgometer is a breakthrough for checking the adjustment of the cartridge's azimuth, axial tilt or perpendicularity of the cartridge's cantilever to the groove. With an incorrect azimuth setting, the electrical output from a stereo cartridge's two generators will be not be equal when reproducing a signal of equal strength in both channels, thus resulting in a channel imbalance and a shift of the soundstage to either the left or right.
The Fosgate Fozgometer is a small, portable, battery powered unit used in conjunction with a test record. It measures channel separation, channel balance, and signal direction quickly and accurately. The meter reads channel separation in both directions and channel balance. The LEDs indicate left, center, and right signal (test tone) positions. Simple and easy to use, the Fosgate Fozgometer is a very accurate tool to help you optimize the sound quality and performance of your cartridge.
Footnote 1: Michael Fremer, Stereophile, "Analog Corner" (May 2010)