Surround Sound Decoder AD-2550

Heathkit (Brand), Heath Co.; Benton Harbor (MI)

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  • Year
  • 1991
  • Category
  • Kit (Parts plus instruction) or building instructions only
  • Radiomuseum.org ID
  • 371971
    • alternative name: Heath Company

 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) / 110-120 Volt
  • Loudspeaker
  • - For headphones or amp.
  • Power out
  • 20 W (25 W max.)
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Surround Sound Decoder AD-2550 - Heathkit Brand, Heath Co.;
  • Shape
  • Book-shelf unit.
  • Dimensions (WHD)
  • 17 x 2.75 x 8.5 inch / 432 x 70 x 216 mm
  • Notes

  • Skill Level 2

    You too can afford theater quality sound at home with our kit Dolby Surround Sound processor. Unlike other decoders in this price range, this unit provides six outputs of audio information – that's 40 percent more than the competition!
    The Heath AD-2550 includes left front, center, right front, sub-woofer and two surround outputs. Our surround processor also has two stereo inputs, allowing you to connect your favorite audio source.
    With a push of a button you can select between three different surround modes. There's Dolby Surround for listening to Dolby Stereo encoded programs, Music Surround for reproducing the depth lost in conventional 2-channel stereo playback, and Mono Enhance for synthesized stereo and surround effects. Plus, we've designed the unit with separate controls for audio time delay, null, surround volume and master volume.
    You won't need a separate amplifier to drive your surround channels, because this unit has its own 20-watt built-in amp. We recommend your surround sound speakers have an 8-16 ohm impedance and a power handling rating of at least 20 watts.
    Other features include one-step adjustment, automatic Dolby B noise reduction, and an all-metal cabinet for reliability and durability. 2 3/4" H x 17" W x 8 1/2" D.


    Specifications:

    • SEPARATION: Front Center to Surround: 70 dB at 400 Hz referenced to 1 kHz Consumer Test Tape.
    • Output Power: 20 watts total RMS power into 8 ohms. 25 watts into 4 ohms.
    • FREQUENCY RESPONSE: Front Channels: ±.5 dB, 18Hz-40kHz. Surround Channels: ±.5 dB of Dolby Surround Specification.
    • TOTAL HARMONIC DISTORTION: Front Channels: .05% 20Hz-20kHz. Surround Channel: .38% max. across full range.
    • OUTPUT NOISE, A-WEIGHTED: Front Channels: –85 dB at 1V RMS, –95 dB from peak level. Surround Channel: –65 dB at 1 watt/8 ohms, –80 dB from peak level.
    • Input Level: .1 to 2.8 VRMS.
    • Output Level: 4 VRMS.
    • Input Balance Range: 6.7 dB of correction.
    • Input Impedance: 47k ohms.
    • Output Impedance: 2.5k ohms max.

  • Price in first year of sale
  • 199.95 USD
  • Mentioned in
  • -- Original prospect or advert (1991 heathkit winter catalog page 27)
  • Author
  • Model page created by Glen Orriss. See "Data change" for further contributors.

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