Japan Technics SU-V4X Integrated Amplifier Class AA MM/MC Phono Stage 65W of Sonic Goodness
RM1,790.00
The Technics SU-V4X is a Japanese-made vintage integrated amplifier featuring Technics’ innovative Computer Drive New Class A technology, designed to combine low-distortion audio reproduction with efficient power delivery.
Detailed specifications
| Specification | Technics SU-V4X |
|---|---|
| Manufacturer | Technics / Matsushita, Japan |
| Year | 1985 |
| Amplifier technology | Computer Drive New Class A |
| Continuous output (8Ω) | 65W + 65W, 20Hz–20kHz |
| Continuous output (4Ω) | 65W + 65W, 20Hz–20kHz |
| 1kHz power output | 70W + 70W, 8Ω / 4Ω |
| Total harmonic distortion | 0.003% at 1kHz, 8Ω |
| Frequency response | 5Hz–120kHz (−3dB) |
| Damping factor | 60 (8Ω), 30 (4Ω) |
| Signal-to-noise ratio | 91dB line input; 76dB MM phono |
| Phono inputs | Moving Magnet (MM) and Moving Coil (MC) |
| MM sensitivity | 2.5mV / 47kΩ |
| MC sensitivity | 170µV / 220Ω |
| Line input sensitivity | 150mV / 22kΩ |
| Bass control | ±10dB at 50Hz |
| Treble control | ±10dB at 20kHz |
| Loudness | +9dB at 50Hz |
| Subsonic filter | 30Hz, −6dB/octave |
| Muting | −20dB |
| Speaker outputs | Main and Remote (A/B) |
| Speaker impedance | 4–16Ω (one pair); 8–16Ω (both pairs) |
| Power consumption | 390W |
| Dimensions | 430 × 97 × 290mm |
| Weight | 6.7kg |
Sources: Technics original operating instructions and service manual.
ManualsLib
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Review
The Technics SU-V4X is an excellent example of Japanese amplifier engineering from the mid-1980s. Its Computer Drive New Class A circuitry was developed to reduce switching distortion while maintaining the efficiency and output capability of a conventional high-power transistor amplifier. With 65 watts per channel into 8 ohms, extremely low rated distortion, and an extended frequency response, the SU-V4X offers an impressive technical foundation for detailed, controlled, and dynamic music reproduction.
One of its greatest strengths is its versatility. The built-in MM/MC phono stage makes it especially attractive to vinyl enthusiasts, allowing both moving-magnet and compatible moving-coil cartridges to be connected without an external phono preamplifier. Separate bass and treble controls, loudness compensation, subsonic filtering, and multiple source inputs make it a practical centrepiece for a complete vintage Hi-Fi system.
For vintage audio enthusiasts, the SU-V4X offers an appealing balance of power, functionality, and classic Technics engineering. It is particularly well suited to efficient bookshelf and floorstanding loudspeakers, including many vintage Japanese and European designs. Its compact, understated appearance and comprehensive features make it an interesting alternative to more commonly sought-after vintage amplifiers from Sansui, Yamaha, and Pioneer. Actual sound quality will depend on the amplifier’s condition, servicing history, and speaker matching.
