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Marantz ST-7 Tuner

History & Build (1979–1982)

The Marantz ST-7 is a high-end stereo tuner from the esteemed “Esotec” series, manufactured in Japan circa 1979–1981 .

Unique Features

Built-in analog oscilloscope, which displays signal strength, multipath reception, modulation level, and more—an exceptional feature for real-time tuning feedback .

Quartz-locked gyro touch tuning for precise frequency control.

Advanced FM front-end utilizing low-noise dual-gate MOSFETs, with dual IF circuits (LC filters and a SAW filter) for superior selectivity and minimal distortion .

Additional fine tuning functions include bandwidth selection, adjustable muting, audio level control, and a 400 Hz tone generator for calibration .


Specs & Design

Dimensions: Approximately 416 × 146 × 301 mm; weight around 9 kg .

Color & Styling: Black aluminum front, rack-mountable with optional handles .


Comparisons & Value

In comparison with its sibling, the ST-8, the ST-7 shares much of the same circuitry but offers different cosmetic details (round vs. square oscilloscope) and output options (adjustable audio outputs) .

According to vintage listings and audiophile sources, the ST-7 often sells in the range of €1000 on marketplaces like eBay .

Why It Still Matters to Collectors & Audiophiles

As one audio fan on a vintage audio forum put it:

> “A good tuner makes a big difference compared to a digital cheapy.”
“A live FM broadcast on a good tuner is the best sound you’ll ever hear.” 



These tuners remain prized not just for nostalgia or display—they can deliver superior analog radio fidelity that many streaming solutions and newer receivers simply can’t match.


Summary Table

Feature	Detail

Era	Late 1970s – Early 1980s
Key Tech	Quartz-locked dialing, oscilloscope, SAW/LC filtering
Design	Solid black/aluminum, rack-mountable
Estimated Market Value €1000 (vintage)
Why Customers Love It	Rich, analog FM sound; elegant design 

Please see detailed photographs for her condition as these form part of the sale 
Video of her being tested available 
Please know we pack with our custom double box and bubble wrap system and we pack for the safety of the item not for economy 
Vintage electronic items are not guaranteed. 



Excellent - Number of items: 1 - Including: Tuner - Power cord

Marantz - St 7 esoteric tuner with oscilloscope. Tuner

Audio Equipment

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29 December

tomorrow

Location

The Netherlands

Italy

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Germany

Spain

Japan

Portugal

Hungary

Poland

Romania

Austria

Denmark

Greece

Lithuania

Latvia

Croatia

Ireland

Slovak Republic

Dimensions

Height

Width

Depth

Brand

Bang & Olufsen

Sony

Marantz

Pioneer

Technics

Akai

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Object

Speaker set

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CD player

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Solid state stereo receiver

Solid state integrated amplifier

Record player

Cassette recorder-player

Solid state multi-channel receiver

Audio-cassette deck

Radio

Stereo set

Subwoofer speaker set

Speaker

Audio amplifier

Audio component

Tuner

Solid state amplifier

Tube radio

Headphone

Reel to reel deck 18 cm

Reel to reel audio

Cartridge and/or needles

Walkman

Solid state stereo amplifier

Country of origin

Material

Aluminium

Metal

Plastic

Wood

Iron

Condition

Good

Excellent

Very good

Mint

Various conditions

Good condition - used with small signs of ageing

Excellent (EX)

Very Good Plus (VG+)

Fair & Poor

Mint (M)

As new - unused

Good condition - used with small signs of aging & blemishes

Mint & Sealed (M&S)

Fair

Excellent condition: barely used with minimal signs of wear

Extras

No extra's

Power cord

Remote control

+ Extra item (see description)

Original user manual

Refurbished

Power Adapter

Power supply

No cables

Case

Brochures

Anti-pop Filter

Flight Case

Microphone Shock Mount

+extra item (see description)

In original box

Period

2010-2020

2000-2010

1940-1950

1980-1990

2020+

1850-1900

Style

Industrial

Scandinavian design

Danish design

Industrial design

Art Deco

Colour

Black

Silver

Tested and working

Tested and working/playable

Not tested

Music memorabilia type

Box Set

1900-2000

After 2000

1400-1900

Before 1400

Creator

Various Artists/Bands in 1970's

Luigi Caccia Dominioni

Japan & Related

Afro Celotto

Livio Castiglioni

Pier Giacomo Castiglioni

Achille Castiglioni

Dieter Rams

Very good - Number of items: 1 - Including: Solid state multi-channel amplifier - Original user manual, Box, Remote control, Power Adapter

Marantz - SR7500 Solid state multi-channel amplifier

Number of items: 2 - Mint (M)

Japan & Related - MA-X 46 - Audio cassette - 1987

Very good - Number of items: 1 - Including: No extra's

JVC - L-E30 Record player

Good - Number of items: 2 - Including: Solid state multi-channel receiver - Remote control

Denon - AVR-3805 - 7.1 Solid state multi-channel receiver

Very good - Number of items: 1 - Including: Power cord

Denon - DCD 485 CD player

Excellent - Number of items: 1 - Including: Headphone - Box

Richard Orlinski - Kong Headphone - Headphone

Good - Number of items: 1 - Including: Hi-fi set - Power cord

Schneider - Music Center System TS 1403Q – stereo compact system with speakers Hi-fi set

Excellent - Number of items: 1 - Including: Power cord

Tivoli - Model one by Henry Kloss Radio

Excellent - Number of items: 1 - Including: Solid state power amplifier - Power cord

Quad - 405 2 stereo power amplifier Hi-Fidelity ICON Solid state power amplifier

Good - Number of items: 1 - Including: Solid state stereo receiver - No extra's

Marantz - NR-1604 - With internet Radio - Solid state stereo receiver

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Marantz - St 7 esoteric tuner with oscilloscope. Tuner

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