Rotel RX-503

Data

General

• Manufacturer: Rotel
• Model: RX-503
• Years of manufacture: 1976 - 1981
• Made in: Japan
• Color: Silver, metal housing with handles
• Remote control: no
• Power consumption:
• Dimensions (WxHxD): 480 x 145 x 325 mm.
• Weight: 10 kg
• Original price approx.: 340 US-$, corresponds to about 1'000 DM

Connections

• Number of inputs:
  • Phono MM: 2 mV, 50 kOhm.

Aux: 150 mV, 50 kOhm, max. 15 V

• • Tape Play 1, 2: 150 mV, 50 kOhm, max. 15 V
  • Antenna FM (75/300 Ohm), MW (300 Ohm).
• Number of outputs:
  • Tape Rec 1, 2: 350 mV, 3.3 kOhm.
  • Tape Rec DIN: 120 mV, 90 kOhm
  • Headphones:
  • 2 pairs of speakers

Technical Data

Amplifier

• Continuous power (at distortion)
  • 8 Ohm: 2x 35 Watt (20 Hz - 20'000 Hz)
  • 4 Ohm: 2x 50 Watt (1 kHz)
• Dynamic power
  • 8 Ohm:
  • 4 Ohm:
• Frequency response: 10 Hz - 50 kHz, ± 3 dB
• Distortion factor: < 0.1 %
• Attenuation factor: 35 at 8 ohms
• Signal-to-noise ratio:
  • Phono MM: 75 dB

High level: 90 dB

• Tone control

Bass: ± 10 dB at 100 Hz Treble: ± 10 dB at 10 kHz

• Loudness: + 10 dB at 100 Hz / + 3 dB at 10 kHz
• High Filter: - 12 dB / octave at 8 kHz

Tuner

• Reception: FM, MW
• Frequencies:
  • FM: 87 - 108 MHz

MW: 525 - 1'605 kHz

• Frequency response: 30 - 15'000 Hz, ± 0,5 dB
• Input sensitivity: 1.7 µV (IHF)
• Distortion factor: 0.3 % (mono), 0.5 % (stereo)
• Signal-to-noise ratio:
  • Mono: 70 dB

Stereo: 65 dB

• Channel separation: 47 dB
• Selectivity: 75 dB
• Co-wave selection: 1.5 dB
• Spurious wave selection: > 90 dB
• Image frequency attenuation: > 100 dB
• IF attenuation: > 100 dB (at 98 MHz)
• AM suppression: 50 dB

Special Features

• Tape dubbing
• Muting

Remarks

• Other models in the same series:
  • Rotel RX-303
  • Rotel RX-403
  • Rotel RX-503
  • Rotel RX-603
  • Rotel RX-803
  • Rotel RX-1203
  • Rotel RX-1603

Pictures

• Extract from brochure: Rotel RX-503