Pioneer A 77X amplifier. Classic Vintage. Fully revitalized.
In 1937 Nozomu Matsumoto created the first magnetoelectric speaker in Japan, and a year later, in Tokyo, he registered the company under the name Fukuin Shokai Denki Seisakusho. In 1961, the company’s name was changed to Pioneer Electronic Corporation. However, the breakthrough came in 1962, when the company entered the Tokyo Stock Exchange and created the world’s first stereo system with speakers in separate housings. Four years later, Pioneer opened branches in the USA and in Europe. In 1978, the company created one of the best-known and most powerful receivers in its history SX-1980. Pioneer can also be proud of great successes in the world of auto-moto, as it introduced in 1975 the world’s first automotive stereo subassembly, then in 1984 a CD player and GPS navigation in 1990. The company also played a major role in the development of DVDs, plasma TVs and technologies Organic LED display (OLED). The company is currently part of Pioneer & Onkyo Corporation.
The A 77X is an incredibly powerful (weight over 16 kg!) amplifier of the iconic Pioneer Elite series. It is distinguished by a built-in high-quality phono preamp and the ability to drive loudspeaker sets with both low and high impedance. The technical construction is based on 3 large transformers and as many as 7 power supplies. The amplifier sounds very natural. It is characterized by a wide and extremely rich music scene, that is why it is highly recommended to enthusiasts of jazz, classical or instrumental music.
The enclosure has been completely revitalized, the potentiometers are in perfect condition (they have been dismantled and cleaned). The metal elements of the enclosure have been painted using the automotive wet painting technique. New side teak boards create an elegant look. The device has been fully reviewed and serviced including capacitor measurement.
The device has been reviewed and serviced.
– power: 2 x 100W
– frequency response: 10 Hz – 100 kHz
– total harmonic distortion: 0.003%
– input sensitivity: 0.2 mV (MC), 2.5 mV (MM), 150 mV (line)
– signal to noise ratio: 70dB (MC), 88dB (MM), 108dB (line)
– weight: 16 kg
– damping factor 100
– output sensitivity: 150mV (line)
– dimensions: 47cm x 14.5cm x 43cm (width x height x depth)
– impedance 4 Ohm – 16 Ohm
– year of production 1985
– made in Japan.