Pioneer A-445

Data

General

• Manufacturer: Pioneer
• Model: A-445
• Type: Integrated amplifier
• Years of manufacture: 1989 - 1990
• Made in: Japan
• Colors: Black, Silver A-445-S
• Remote control: no
• Power consumption: 550 W
• Dimensions (WxHxD): 420 x 123 x 330 mm
• Weight: 8 kg
• Original price approx.: 500 DM

Technical Data

• Continuous power (with distortion factor)
  • 8 Ohm: 2 x 60 W / 0,009% * 4 Ohm: 2 x 80 W / 0,009

4 Ohm: 2 x 80 W

• Dynamic power
  • 8 Ohm: 75 W
  • 4 Ohm: 110 W
• Frequency response:
  • PHONO (MM) 20 HZ to 20kHz ± 0.3 dB

PHONO (MC) 20 HZ to 20kHz ± 0.5 dB

• Total harmonic distortion: 0.008 %
• Noise floor: 107 dB
• Inputs:
  • PHONO (MC/MM)
  • TUNER
  • CD
  • Line/AUX

2x TAPE/MD/DAT

• Separable pre- and power amplifier (IN-OUT/PRE-OUT)
• Connections for 2 speaker pairs A + B individually switchable
• Controls:
  • Volume

balance Bass treble

• Muting button
• Loudness button
• Subsonic button
• Line Direct switch

Special Features

• Super Linear Circuit (SLC): by cancelling the non-linearity of one component with the complementary non-linearity of the other, the lowest possible distortion, higher stability and flat frequency response are achieved. Overall, better sound reproduction is achieved thanks to the excellent open-loop frequency response.
• Six-position recording selector switch.
• Honeycomb-ribbed chassis, honeycomb-structured heat sink and honeycomb damper feet to protect against resonance and microphonic effects.
• Digital sound quality even at low impedances: High stability to impedance curve fluctuations.
• "Non-Switching" Type II: Amplification without switching distortion; improved thermal stability and high linearity for natural sound.
• Direct Connection: Signal reaches the output via the shortest possible path, contributing to sound purity.
• Clean Ground System: Ground side free of leakage components due to chassis isolated from transformers and heat sinks.
• DIRECT switch: For direct connection to the volume control.
• Outputs for two pairs of speakers: Choice of separate or common operation.
• High-gain phono equalizer amplifier.

Remarks

• Previous model:
• Pioneer A-443

• Successor model:
• Pioneer A-447

• Other models in the same series:
• Pioneer A-225
• Pioneer A-335
• Pioneer A-445
• Pioneer A-656
• Pioneer A-757
• Pioneer A-858

Pictures

• [[Picture: Pioneer A-445

Test reports

• Report in "FonoForum" 12 / 1989