Very good sounding professional Teac with button controlled quick acces. And DBX systems Build like a tank. Very well engineered. The whole power supply had a re-cap. Also the Dolby circuit is repaired and works fine again. Plays and spins very good. New capstan belt installed. Heads demagnetized and cleaned. Head is as very good Speed and azimuth checked correct. Records sounds excellent All levels checked. Little Signs of use on top only. Pictures are also description. Carefully insured shipped Manufacturer:Teac Model: A-550 RX with DBX Type: Cassette Tape Deck Years of manufacture: 1979 - 1981 Made in: Japan Color: Silver Remote control: yes, RC-90 Power consumption: 36 W Dimensions: 440 x 145 x 345 mm (WxHxD) Weight: 9.5 kg Original price approx.: 63'000 Yen (Japan, 1978), 1'298 DM Option remote control RC-90: 10'500 Yen, 170 DM Option 19" rack handles AH-20: 3'500 Yen, 50 DM Connections Number of inputs: Line In: 275 mV / -9 dB / 50 kOhm (RCA). Line In DIN: 13.8 mV / 10 kOhm Microphone: 1.1 mV / -57 dB / 10 kOhm (6.35 mm jack) Number of outputs: Line Out: 436 mV / 50 kOhm (Cinch) Line Out DIN: 30 mV, 50 kOhm Headphones: 4 mW, max. 8 Ohm Technical Data System: 4-track, 2-channel stereo Audio heads: 2 Recording / Playback: 1 Erase: 1 Motor: 1, DC-Servo Synchronisation fluctuations: < 0.07 % (WRMS) Tape types: I, II, IV Frequency response: Normal: 30 - 16'000 Hz, ± 3 dB Chrome: 30 - 18'000 Hz, ± 3 dB Metal: 30 - 19'000 Hz, ± 3 dB Distortion factor: 2.2 Signal-to-noise ratio: Dolby Off: 56 dB (1 kHz) Dolby B On: 66 dB above 5 kHz DBX: 80 dB Premagnetization and erase frequency: 100 kHz