Marantz Model 30
The Marantz Model 30 is an integrated solid-state stereo amplifier from the early 1970s. The record on it is thin. The specifications come from multiple sources, but almost no production history is documented. No production years or original price have surfaced in the archive's sources.
Here is what is well established. The Model 30 is rated at 45 watts RMS per channel into 8 ohms, with frequency response of 20 Hz to 20 kHz ±0.5 dB and 0.5% total harmonic distortion. Signal-to-noise is 90 dB on line inputs (78 dB on phono). Inputs are phono, tuner, aux, tape 1, and tape 2, with phono sensitivity of 2.5 mV. Dimensions are 425 × 135 × 310 mm (17.25 × 5.25 × 12 inches) and it weighs 10 kg. Power consumption is rated at 190 watts.
The period advertising tells a slightly different story than the spec sheets. A Marantz ad campaign ran in High Fidelity (August 1970, p.64) and Audio (May 1970, p.40). It pitched the Model 30 as part of Marantz's effort to reach buyers below their traditional very-high price range. The ads noted that until the previous year, the least expensive Marantz FM tuner cost $750. They called the Model 30 a "Stereo Amplifier Console" with 120 watts RMS (180 watts IHF), priced at $395 in the May 1970 ads and $450 by August of that year. Whether the 120-watt figure reflects a different measurement standard, a different version, or simply advertising elasticity is not documented.
Owner reports from forums are uniformly positive. One owner reports 30 years of service, and another calls the phono stage "dead silent," which is rare for the era. The only complaint noted is the lack of a remote control, which is hardly surprising for a unit this age.
Still missing: design and circuit topology details, any relationship to sibling models like the Model 32 or 33 (both of which appear alongside the Model 30 in the same ads), and current market pricing. The Model 30 sits in the gap between Marantz's tube era and their later receiver dominance. It competed with the likes of Pioneer and Kenwood.
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