Marantz Model 2100 (1975–1976)
The Marantz Model 2100 is a solid-state FM/AM tuner built in a short window in the mid-1970s. Sources place its introduction in 1976, with production running 1975 to 1976. It is a standalone tuner with no built-in amplifier, so you pair it with a separate integrated amp or receiver. A period review in HiFI-Stereo (September 1977, p.57) noted the competitive landscape of the era.
The FM section is well specified. Usable sensitivity is rated at 1.9 µV, with 50 dB quieting at 3.0 µV in mono and 38 µV in stereo. Signal-to-noise is 73 dB mono and 70 dB stereo, with THD of 0.2% mono and 0.3% stereo. Selectivity is 70 dB, capture ratio is a tight 1.5 dB, and image and IF rejection are both rated at 90 dB. Stereo separation measures 45 dB at 1 kHz. The FM tuning range is 87.5-108.6 MHz, with antenna inputs for both 300-ohm balanced and 75-ohm unbalanced connections. AM coverage runs 530-1600 kHz.
Output is fixed at 550 mV or variable from 0-550 mV. The unit draws just 8 watts, and dimensions are 420 × 140 × 280 mm. One source lists the weight at 14.5 kg, which is heavy for a tuner and suggests a substantial chassis and power supply. Only that single source confirms the figure.
Known specs, cross-confirmed where possible:
- FM usable sensitivity: 1.9 µV
- 50 dB quieting: 3.0 µV mono / 38 µV stereo
- S/N: 73 dB mono / 70 dB stereo
- THD: 0.2% mono / 0.3% stereo
- Selectivity: 70 dB; capture ratio: 1.5 dB
- Stereo separation: 45 dB at 1 kHz
- Output: 550 mV fixed; 0–550 mV variable
- Power consumption: 8 W
- Dimensions: 420 × 140 × 280 mm
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