Optonica SM-4545

Data

General

  • Manufacturer: Sharp Optonica
  • Model: SM-4545 (US version of the Optonica SM-4000 II)
  • Type: Integrated amplifier
  • Years of manufacture: 1975 - 1979
  • Color: Silver
  • Remote control: No
  • Power consumption: 360 watts
  • Dimensions: 442 x 144 x 380 mm (WxHxD)
  • Weight: 16 kg
  • Original price approx.: 115'000 Yen (Japan, 1975), 1'650 DM


Connections

  • Number of inputs:
    • Phono 1, 2: 2.5 mV, 47 kOhm.
    • Tuner; 150 mV, 47 kOhm
    • 2x AUX: 150 mV, 47 kOhm

2x Tape: 150 mV, 47 kOhm

    • Main In: 500 mV, 100 kOhm
  • Number of outputs:
    • Tape Rec (Cinch): 150 mV
    • Tape Rec (DIN): 30 mV
    • Pre Out: 1 V
    • 2 speaker pairs (4 - 16 Ohm)


Technical Data

  • Continuous power (at distortion factor)
    • 8 Ohm: 2x 70 W
    • 4 Ohm:
  • Dynamic power
    • 8 Ohm:
    • 4 Ohm:
  • Total harmonic distortion: 0.05 %
  • Attenuation factor: 5 - 40'000 Hz (± 1dB)
  • Signal-to-noise ratio:
    • Phono: > 65 dB
    • High level: > 85 dB
  • Tone control:
    • Bass: ± 10 dB (100 Hz, 2 dB steps).

Treble: ± 10 dB (10 kHz, 2 dB steps)

  • Loudness: yes, +11.5 dB (100 Hz), +6.5 dB (10 kHz)
  • High Filter: -3 dB (6 kHz, 12 dB/oct.)
  • Low Filter (subsonic): -3.5 dB (60 Hz, 12 dB/oct.)
  • Mute: yes, -20 dB


Special Features

  • Pre- and power amplifier can be separated


Remarks



Pictures

  • Image: Optonica SM-4545

Sharp Optonica SM-4545-1.jpg


  • Excerpt from US advertisement: Optonica SM-4545, ST-3535

Sharp Optonica SM-4545-ST-3535-Werbung-1978.jpg


Reviews

Links