Sony - TA-F40 Solid state integrated amplifier

Vintage Integrated Amplifier – Sony TA‑F40 Stereo Amplifier (Circa 1979–1980)

Offered here is the Sony TA‑F40, a classic integrated stereo amplifier from Sony’s late‑1970s era, representing thoughtful engineering and audio performance from a time when hi‑fi design prioritised both sound integrity and electrical innovation. Part of Sony’s respected audio component line, the TA‑F40 combines solid power, low distortion, and thoughtful technological features, making it desirable for vintage hi‑fi collectors.

Features & Specifications:
Model: Sony TA‑F40 Integrated Stereo Amplifier
Year of Manufacture: Circa 1979 – 1980
Type: Solid‑state integrated stereo amplifier
Power Output: 50 W per channel into 8 Ω (both channels driven)
Frequency Response: 5 Hz – 70 kHz (wide range for detailed sound)
Total Harmonic Distortion (THD): 0.01 % (very low distortion at effective output)
Signal‑to‑Noise Ratio: Excellent performance with high‑level input clarity
Input Sensitivity: Phono MM/MC, line‑level inputs for Tuner, Aux, Tape etc.
Damping Factor: 50 — good control over connected speakers
Speaker Load Impedance: 8 Ω – 16 Ω


Engineering Highlights:
The TA‑F40 incorporates advanced techniques derived from high‑grade amplifier development. It uses a pulse power supply architecture to convert AC mains into DC quickly, reducing magnetic interference and maintaining stable voltage for clean amplification. The design includes heat dissipation via efficiently engineered heat paths that reduce unwanted electrical noise. Hi‑f power transistors with excellent high‑speed response help suppress dynamic distortion, such as transient intermodulation, without resorting to overly complex circuitry. The amplifier also supports MC cartridge direct input, self‑defeat tone control, and a classic analogue control layout that gives tactile precision to the listeners & audiophiles.

Condition:
This Sony TA‑F40 is presented in mint cosmetic condition with minor surface wear consistent with age.

Collectable & Practical Value:
The TA‑F40 is a fine example of late‑1970s Sony hi‑fi design, balancing power, musicality, and thoughtful engineering. Its solid‑state nature, wide frequency response, and classic analogue controls offer a nostalgic listening experience with room for modernisation after service. Whether you’re restoring a vintage rack or appreciating analogue performance with modern speakers, this amplifier carries authentic retro character and functional potential.

Tested, demonstrated, and proudly presented by SpaceTime Engineering — watch it in action on our YouTube channel:

https://www.youtube.com/@spacetimeengineering

Shipping:

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Seller’s Story
We are a highly specialised company based in the Netherlands offering high‑quality vintage audio and AV equipment throughout Europe generally through Catawiki.