Onkyo A-8850

Data

General

• Manufacturer: Onkyo
• Model: A-8850
• Model series: Integra
• Type: Integrated amplifier
• Years of manufacture: 1992 - 1996
• Made in: Japan
• Colours: Black, Polar silver
• Signal processing: Analog
• Remote control: Yes ( RC 207 S )
• Power consumption: 220 W
• Dimensions: 455 x 170 x 420 mm (WxHxD)
• Weight: approx. 16 kg
• New price approx.: 850 DM

Connections

• Number of inputs: 8
  • Phono (MM): 2.5 mV / 50 kΩ
  • Phono (MC): 150 µV / 130 Ω
  • CD: 150 mV / 30 kΩ
  • Tuner: 150 mV / 30 kΩ
  • Tape 1: 150 mV / 30 kΩ
  • Tape 2: 150 mV / 30 kΩ

DAT: 150 mV / 30 kΩ

• Number of outputs: 3
  • Tape 1: 150 mV / 1 kΩ
  • Tape 2: 150 mV / 1 kΩ
  • DAT: 150 mV / 1 kΩ

Technical Data

• Sine power (at distortion).
  • 8 Ohm: 2x 90 Watt (0,008%)
  • 4 Ohm: 2x 120 Watt (0,008%)
  • 2 Ohm: 2x 150 Watt (0,008%)
• Output power
  • 8 Ohm: 2x 115 Watt
  • 4 Ohm: 2x 167 Watt
  • 2 Ohm: 2x 210 Watt
• Total harmonic distortion: 0.008%.
• Attenuation factor: 150 at 8 Ω
• Frequency response: 2 - 50,000 Hz
• Signal-to-noise ratio: 107 dB
• Tone control: Yes
  • Bass: ± 8 dB at 100 Hz
  • Treble: ± 8 dB at 10 kHz
• Loudness: No
• High Filter: Yes
• Low Filter (Subsonic): Yes
• Mute: Yes
• Direct/Line-Straight: Yes

Special Features

• Servo operated input selector switch
• AEI Transformer

Remarks

• Other models in the same series:
• Onkyo A-8820
• Onkyo A-8830
• Onkyo A-8840
• Onkyo A-8940
• Onkyo A-8850
• Onkyo A-8870

Pictures

• [[Picture: Onkyo A-8850

• Picture: Onkyo A-8850

Reports

• A known malady of this series of Onkyo is a, with time, malfunction of the Input Selector.

• Due to dirt and corrosion within the rotary switch, contact problems are common, resulting in erratic and random jumping around between inputs.
• However, there is often one or more positions of the rotary switch where the problem occurs less frequently if at all.

• The problem can almost always be eliminated by treating the inside of the rotary switch with contact spray, or better yet, mechanically cleaning the contact surfaces beforehand.
• A recurrence of the problem after a certain time frame, which can range from hours to years, cannot be ruled out.

The success depends strongly on the intensity of the cleaning and the agents used.

I bought the 8850 amplifier from Onkyo in January 1992 with the DX 6830 CD player, TA 2870 cassette deck, T 4830 tuner, all from Onkyo and Revox loudspeakers, and have had no failures to date. I am more than satisfied!