Stereo Power Amplifier DH-220

Hafler Co., David; Pennsauken (NJ)

  • Year
  • 1984 ?
  • Category
  • Audio Amplifier or -mixer
  • Radiomuseum.org ID
  • 307356

 Technical Specifications

  • Number of Transistors
  • Semiconductors present.
  • Semiconductors
  • Main principle
  • Audio-Amplification
  • Wave bands
  • - without
  • Details
  • Hi-Fi equipment
  • Power type and voltage
  • Alternating Current supply (AC) / 60Hz, 120 Volt
  • Loudspeaker
  • - This model requires external speaker(s).
  • Power out
  • 230 W (undistorted)
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Stereo Power Amplifier DH-220 - Hafler Co., David; Pennsauken
  • Shape
  • Book-shelf unit.
  • Dimensions (WHD)
  • 16 x 5.125 x 10.5 inch / 406 x 130 x 267 mm
  • Notes
  • A Stereo Power Amplifier available ready built or as a kit. Intended for 120 V AC 60Hz in the USA, for use in other countries a multi-voltage power transformer is available at extra cost for 100, 110, 120, 200, 220 and 240 volts 50 or 60 cycle AC mains.

    The Hafler DH-222 Bridging Kit is available to enable conversion of the DH-220 into a high power monophonic amplifier, bridging the two conventional channels into a single floating output which can deliver in excess of 400 watts into an 8 ohm load. Its rated power output is 350 watts across the audio band.

    Semiconductor Complement :
    26 transistors. 8 power Mosfets, 29 diodes, 4 zener diodes. 1 diode bridge.

    Power Rating:
    Less than 0.02% total harmonic distortion at any power level up to 115 watts continuous average power per channel into 8 ohms at any frequency between 20 Hz and 20 kHz with both channels driven.

    IM Distortion (SMPTE):
      Less than 0.005%, from 1 watt to 115 watts into 8 ohms.

    Typical THD at 115 watts into 8 ohms:
      1 kHz  - 0.0025%
      10 kHz - 0.007%
      20 kHz - 0.012%

    Frequency Response into 8 ohms:
      2 Hz to 160 kHz at 1 watt
      6 Hz to 60 kHz at 115 watts

    Typical Channel Separation:
      20 Hz:  > 75 dB
       1 kHz: > 85 dB
      20 kHz: > 65 dB

    Signal to Noise Ratio, unweighted:
      Better than 100 dB at 115 watts into 8 ohms

    Input Impedance:
      47,000 ohms.

    Input Sensitivity:
      1.55 volts RMS for 115 watts into 8 ohms.

     

  • Net weight (2.2 lb = 1 kg)
  • 26 lb (26 lb 0 oz) / 11.804 kg
  • Literature/Schematics (1)
  • - - Manufacturers Literature (Hafler DH-220 Instructions for operation and kit assembly dated 1984)
  • Author
  • Model page created by Howard Craven. See "Data change" for further contributors.

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