The Infinity Black Widow tonearm, introduced in the early 1980s, features an extremely low effective mass of just 3 grams, making it distinctive among tonearms. Its design focuses on compatibility with low mass cartridges like the ADC XLM series, which is known for its exceptionally light stylus/cantilever assembly. The arm initially had issues with breakage but evolved to include a graphite arm tube and options for damping, enhancing its performance. It employs a knife-edge pivot design for vertical bearings and miniature ball bearings for lateral movement, with adjustable features for tracking force and vertical tracking angle. The tonearm's geometry is designed for Stevenson alignment, ensuring optimal tracking of records. Users have noted its ability to deliver fast and detailed sound with excellent stereo separation, particularly when partnered with specific cartridges designed for low mass applications, resulting in a listening experience praised for its coherence across the frequency spectrum.
