Description
Pioneer A 656 amplifier. Pioneer F 504 RDS tuner. 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.
Due to its high power consumption, the Pioneer A 656 is quite detailed and can put accent even in those loudspeakers that are difficult to drive. Quite a broad soundstage. Dynamic and spacious, the midrange is clearly marked but not overbearing.
The enclosures have been completely revitalized. The metal parts have been cleaned and painted using the automotive wet painting technique. Black varnish was used and secured with a clear matte one. The new American walnut side boards give the set an elegant look.
The devices have been fully reviewed and serviced.
Technical data:
Pioneer A 656 amplifier
– power – 2 x 70W at 8Ohm, stereo, 2 x 95W at 4Ohm, stereo
– frequency response – 1Hz – 150kHz
– total harmonic distortion – 0.005%
– input sensitivity – 0,2 mV (MC), 2,5 mV (MM), 150 mV (line)
– signal-to-noise ratio – 77 dB (MC), 95 dB (MM), 110 dB (line)
– output – 150mV (line)
– damping factor – 70
– weight 15 kg
– dimensions – 46cm x 16cm x 38cm (width x height x depth)
– year of production 1989/90
Pioneer F 504 RDS tuner
Technical data:
– Mono / Stereo digital tuner
– cinch output, 2 x coaxial FM 75 Ohm
– RDS (Radio Data System)
– PS indicator (program service name)
– PTY (program type) display
– RT display (radio text up to 64 characters, which appears on the display)
– CT display (time)
– EON function – automatic switching to an RDS station with traffic announcements, news or news program and then switching back to the original station
– search for stations by program name or type
– manual entry of station names (four letters, FM / MW for all 40 available stations)
– the electric field strength (signal strength) of the received program is displayed digitally
– Type IV digital direct decoder – unique characteristics thanks to digital signal processing with direct conversion of frequency-modulated HF into stereo channel components
– built-in “linearizer” guarantees extremely low distortion, NORMAL and NARROW reception
– FDNR low-pass filter – for filtering carrier residues in the output stage
– HF attenuator – prevents clipping in the case of strong local transmitters
– Memory scan, MPX mode switch (AUTO / MONO) and tuning knob with three operating modes (manual, automatic and fine adjustment in 25 kHz steps)
– FM / MW IF band – switchable between “normal” and “very narrow” for FM and MW
– vibration damping design prevents even the slightest deterioration in sound quality (honeycomb casing, large vibration damper, all components have been carefully selected to ensure high sound quality)
– 40 program memory locations, divided into 4 groups of 10 memory locations
– manual and automatic station search
– 10 direct station selection buttons
– input sensitivity (mono) – 12.1 dBf (1.1 uV, 75 Ohm)
– input sensitivity (DIN) – 0.9 uV (mono); 28 uV (stereo)
– signal-to-noise ratio (mono / stereo): 84 dB / 78 dB
– total harmonic distortion – 0.06% (mono); 0.15% (stereo) – selectivity: 75 dB (normal); 75 dB (narrow)
– stereo channel separation – 55 dB / 40 dB
– dimensions: 46cm x 9cm x 31.5cm (width x height x depth)