AM STEREO:C-QUAM the Sony CXA1758 16pin Operating Instructions (primary manual)
AMAX certified; uses the Sony Multi-System decoder, but only the C-Quam-compatible mode is enabled; selectable Narrow and Wide bandwidth modes. The Sony SRF-42 was introduced in early 1994, and at a common retail price of $29.99, it is the least expensive AM Stereo radio ever sold.