FM-1

About the FM-1

The Crown FM-1 is a quartz-referenced, digitally synthesized FM-only stereo tuner introduced around 1979 by Crown International of Elkhart, Indiana, featuring touch-controlled, no-moving-parts tuning and LED frequency/meter readouts. It uses a 6-gang front end with 3 ceramic filters and one Surface Acoustic Wave (SAW) filter, employs quadrature detection with a CA/LM3189 IC, and was designed as a high-quality, single-purpose FM component. The FM-1 provides variable line-level outputs with independent left and right level controls, mute adjustment, and multipath outputs, and its ceramic filters are socketed for easy replacement. Its build quality and controls are often described as being of "military" or "laboratory" standard, reflecting Crown's professional heritage. It tunes the FM broadcast band (typically 88-108 MHz) with PLL digital tuning and pilot-cancelling stereo demodulation, but detailed specs such as exact S/N ratio, weight, and cabinet material vary by source and are not consistently documented in primary manufacturer literature.