Marantz SR1100 (1974)
The Marantz SR1100 is a compact AM/FM stereo receiver introduced in 1974. It's a modestly powered unit at 25 watts per channel into 8 ohms at 1kHz, but it earned a small following for its sound quality rather than its headline numbers. The record on this model is thin. No market positioning, competitor comparisons or original pricing has survived in the sources we've found. What is documented is a consistent set of specifications across multiple databases, plus a handful of enthusiastic owner reports.
Technically, the SR1100 is straightforward late-1970s Marantz engineering. The tuner section uses a 2-gang variable capacitor with a 10.7MHz IF and a ratio detector for FM, and a 455kHz IF for AM. The amplifier delivers its 25 watts with 0.5% THD at rated output, and the phono stage accepts 2.5mV from a moving-magnet cartridge. Frequency response is rated at 20Hz-20kHz ±0.5dB, with a damping factor of 40 into 8 ohms. Signal-to-noise is respectable for the era: 80dB on phono and 95dB on line inputs. The unit weighs 11.3kg (25 lbs) and measures 440mm × 135mm × 310mm.
One spec discrepancy exists. FM tuner sensitivity is listed as both 2.0µV and 2.5µV, depending on the source. We're flagging it rather than picking a side. The FM section's signal-to-noise ratio is also undocumented in the available material.
Owner reports from forum discussions are consistent. One long-term owner described it as "a great little receiver for a desk setup or small room," noting that while it's only 25 watts, it "sounds surprisingly good - warm and musical." Audio (October 1982, p.50) included the SR1100 among receivers in a period roundup, which confirms it was available in the marketplace. The same owner offered two practical caveats. The unit runs hot, so ventilation matters, and dial lamp bulbs are a common replacement item on aging units. No other recurring failure points have surfaced in the documentation we've gathered.
- Power Output: 25W per channel into 8Ω at 1kHz
- Frequency Response: 20Hz–20kHz ±0.5dB
- THD: 0.5% at rated output
- Damping Factor: 40 at 8Ω
- Phono Input: 2.5mV / 47kΩ, S/N 80dB
- Line Input: 150mV / 20kΩ, S/N 95dB
- FM Sensitivity: 2.0µV–2.5µV (conflicting sources)
- Tuner IF: FM 10.7MHz; AM 455kHz
- Dimensions: 440mm × 135mm × 310mm
- Weight: 11.3kg (25 lbs)
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