Marantz ST-46 (1977–1979)

Name: Marantz ST-46
Brand: Marantz

The Marantz ST-46 is a solid-state AM/FM stereo tuner from the late 1970s. Marantz was producing some of its most respected separates then. Documentation on this model is thin, and the sources that exist disagree on a few technical points. What can be stated with reasonable confidence: it covers FM and MW bands, has a tuning indicator, and puts out a fixed audio signal of roughly 1 volt from a 2.2 kΩ impedance.

The FM section was rated at 1.3 µV sensitivity (one source lists 1.0 µV), a signal-to-noise ratio of 70 dB (another claims 75 dB), and total harmonic distortion of 0.3%. Selectivity is listed at 60 dB, and frequency response runs 30 Hz to 15 kHz. Those are figures for a competent mid-tier tuner of the period. The semiconductor count is reported as either 7 ICs, 23 transistors, and 24 diodes, or 6 ICs, 16 transistors, and 24 diodes, depending on the source. The conflicting values for sensitivity, S/N ratio, and component counts remain unresolved.

The ST-46 measures approximately 416-420 mm wide, 120 mm high, and 280 mm deep, and weighs 4.6 kg. Power consumption is listed at 10-12 W. A late-1990s tuner roundup in HiFI-Stereo (1998, p.68) noted its 30 AM/FM presets, system remote control jacks, scan tuning, fluorescent display, and alphanumeric labeling. That puts it among the more feature-rich tuners of its generation.

No original price, historical context, or owner reviews have turned up in the available documentation. The ST-46 appears to have been a straightforward, well-equipped tuner from Marantz's late-1970s lineup.

Known specs (where sources agree):