IO II

About the IO II

The Audio Note IO II is a high-end moving coil phono cartridge designed with a focus on mechanical integrity, magnetic circuit optimization, and superior wire quality. It uses 99.99% pure silver wire for the coils extending directly to the output terminals to minimize electrical connections and maximize signal purity. The cartridge body is constructed to minimize resonance and standing waves, featuring brass panels bolted around the magnet assembly for rigidity. The cantilever is a tapered titanium tube optimized for efficient energy transfer and dissipation, contributing to the cartridge's clear and true sound reproduction. It employs an AN Type 2 diamond stylus for better tracking, lower surface noise, and longer life. The IO II has a very low output voltage of 0.04 mV at 5 cm/sec, requiring a step-up transformer for optimal performance. It weighs approximately 11 to 18 grams and uses Alnico magnets. The frequency response ranges from 10 to 50 kHz with ±2 dB accuracy, and channel separation exceeds 30 dB at 1 kHz. The recommended tracking force is 2 to 3 grams, with 2.5 grams optimal. Due to its low output and impedance (1 Ohm internal, 3-4 Ohms matching), it is best paired with a suitable step-up transformer and a moving magnet compatible phono stage. The cartridge is designed to be mounted rigidly with up to six screws to ensure mechanical stability and minimize colorations from body resonance. Specifications are subject to change due to ongoing R&D by Audio Note (UK).