Power Amplifier Model 9

Marantz (Sound United LLC); Vista, CA

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  • Année
  • 1960–1968
  • Catégorie
  • Amplificateur BF ou mélangeur BF
  • Radiomuseum.org ID
  • 219390

Cliquez sur la vignette du schéma pour le demander en tant que document gratuit.

 Spécifications techniques

  • No. de tubes
  • 7
  • Principe général
  • Amplification audio
  • Gammes d'ondes
  • - sans
  • Particularités
  • Equipement HIFI
  • Tension / type courant
  • Alimentation Courant Alternatif (CA) / 117 Volt
  • Haut-parleur
  • - Ce modèle nécessite des HP externes
  • Puissance de sortie
  • 70 W (sans distorsion)
  • Matière
  • Boitier métallique
  • De Radiomuseum.org
  • Modèle: Power Amplifier Model 9 - Marantz Sound United LLC;
  • Forme
  • Modèle de table profil bas (grand modèle).
  • Dimensions (LHP)
  • 15.375 x 8.25 x 10.5 inch / 391 x 210 x 267 mm
  • Remarques

  • A massive hi-fi mono power amplifier with power output of 70 watts RMS into 8 ohms. A pair are required for stereo.

    SPECIFICATION  
    POWER 70 watts continuous
    140 watts peak
    Switch for nearly 40 watt triode operation
    RESPONSE  
     At full rated power within 0.1dB, 20Hz-20kHz
    within 1dB, 12Hz-40kHz
     At ½ watt within 1dB, 3Hz-40kHz
    HARMONIC DISTORTION  
     At full rated power less than 0.1% at mid-frequencies
    less than 0.33% at 20Hz-20kHz
    I.M. DISTORTION less than 0.5% at full rated power
    HUM & NOISE Better than 90dB below 70 watts
    DAMPING FACTOR 17
    Damping Factor can be changed
    internally by adding current feedback
    OUTPUT IMPEDANCES 4Ω, 8Ω and 16Ω, plus 1Ω tap
    for center-speaker connection

    TEST SECTION
    Complete built-in instrument for self-testing and balancing of output and driver tubes. Adjustments for balance of driving signal. The circuit includes five screwdriver adjustments, a seven-position test switch, and an accurately calibrated d'Arsonval meter. These simple adjustments eliminate the need for matched output tubes and assure optimum performance despite normal tube aging.

    CONTROLS
    All controls, adjustments and connections, with the exception of the Triode switch, are accessible from the front.
    Gain Control: isolated by cathode-follower, phase circuit.
    Phase Switch: for securing correct phase relation (A + B)  of phantom center-channel  speaker fed by two amplifiers.
    Low Filter: Subsonic cutoff filter, less than 0.25dB at 20Hz, 20dB at 3Hz.
    Test Switch: for bias (plate current) readings for each tube. Built-in test signal for dynamic balance adjustment.

    Five bias and balance adjustments, as well as input and output connections, are located under snap-out access panel.

    The Model 9R has rack fittings.

    The Model 9 was reissued in 1996, one of the Marantz Classic Series.

    Power requirements
    117V (105-125V) 50/60Hz

    Power consumption:  190-250 watts

  • Poids net
  • 23 kg / 50 lb 10.6 oz (50.661 lb)
  • Prix de mise sur le marché
  • 324.00 $
  • Littérature
  • -- Original prospect or advert (Marantz Model 9 Seventy Watt Amplifier brochure)
  • Schémathèque (1)
  • - - Manufacturers Literature (Service manual Marantz 9 Power Amplifier)
  • Schémathèque (2)
  • - - Manufacturers Literature (Instruction manual Marantz Model 9 Power Amplifier)
  • Auteur
  • Modèle crée par Gottfried Silberhorn. Voir les propositions de modification pour les contributeurs supplémentaires.

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