Description

The Marantz 4270 is a stereo and quadraphonic receiver produced between 1976 and 1977, at the top of the American company's quadradial range and among the most sought-after models by vintage hi-fi enthusiasts. Built in the golden age of analog audio, it integrates the AM/FM tuning section , the MM phono preamplifier and a four-channel power amplifier in a single chassis, for a weight of over 18 kg which testifies to the generosity of the components and an oversized power supply.

At the heart of the 4270 is Marantz’s proprietary Vari-matrix circuitry , capable of extracting a full four-channel sound image from any conventional stereo program, delivering unexpected depth and spatiality even with traditional sources. The unit also reproduces discrete 4-channel programs, matrix-encoded material , and of course stereo and mono without compromise, with the option of housing an optional decoder for specific systems such as the Columbia SQ.

On the electrical level, it delivers 25W per channel into 8Ω in quadraphonic configuration, with an extended frequency response from 20Hz to 20kHz, a total harmonic distortion of 0,3% and a damping factor of 45. The 2,2mV input sensitivity on the MM phono stage allows it to be paired with most moving magnet cartridges of the time, while the 150mV on the line input is also perfect for modern sources such as CD players, external DACs or network streamers connected via RCA. How to connect a vintage turntable to a quadraphonic Marantz receiver? Simply use the MM phono input , which already provides RIAA equalization and correct gain for the cartridge, without the need for external phono preamps.

The 4Ω to 16Ω load rating makes the 4270 compatible with a wide range of bookshelf and floorstanding speakers , both contemporary and contemporary, while maintaining control and dynamics even on four-way systems. Out of production for decades and now a cult object among audiophile collectors, it retains the charm of the champagne-colored front panel with illuminated dial, milled aluminum knobs, and large analog VU meters , a trademark of Marantz style from the 1970s. An ideal choice for those seeking a vintage amplifier capable of enhancing both quality stereo listening and the rediscovery of the few quadraphonic software still available.

Specifications

Amplification type	transistor
RMS power per channel	25 W
Reference load	8 ohm
Stadio phono	MM
Analog inputs	Phono MM, line, AM/FM tuner
Year of production	1976-1977
country of origin	USA
Frequency response	20-20000
Harmonic Distortion (THD)	0.3%
Line input sensitivity	150
Phono load impedance	2.2 Ω
Dimensions (WxHxD)	440 x 137 x 365 mm
Weight	18.2 kg
Trim	champagne

About the brand

Marantz is a historic brand specializing in CD players, integrated amplifiers, and digital converters that combine ease of use with balanced sound quality. Its products are aimed at those seeking a compact and reliable stereo system without sacrificing excellent listening quality: from entry-level models like the CD60 and PM6007 to the more sophisticated Model 40N and SACD 30N, every Marantz solution is designed for those who want pure music without complications.

To choose the right model, first consider the primary source (CD, streaming, vinyl): Marantz SACD players offer superior resolution, while integrated amplifiers vary in power and connectivity. Then consider the available space and the pairing with your speakers: Audiocostruzioni It carries the entire Marantz range along with over 70 other brands, and you can listen to the different combinations in its Carpi listening room. Available new, guaranteed used, and ex-demo models, with a free consultation to find the solution that best suits your budget and needs.

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