Quad 77 Power Amplifier 7767

Quad (Brand); Acoustical Manufacturing Co. Ltd.; Huntingdon

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  • Year
  • 1995 ?
  • Category
  • Audio Amplifier or -mixer
  • Radiomuseum.org ID
  • 317772

 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; 220-240 Volt
  • Loudspeaker
  • - This model requires external speaker(s).
  • Power out
  • 170 W (230 W max.)
  • Material
  • Various materials
  • from Radiomuseum.org
  • Model: Quad 77 Power Amplifier 7767 - Quad Brand; Acoustical
  • Shape
  • Book-shelf unit.
  • Dimensions (WHD)
  • 321 x 65 x 300 mm / 12.6 x 2.6 x 11.8 inch
  • Notes

  • A stereo hi-fi power amplifier housed in a nextel or carbon finish cabinet, a component in the Quad 77 Series of hi-fi separates. With two Ampbus connectors for connection to a Quad 77 Preamplifier and connection to other 77 Power Amplifiers for Bi-Amping/Tri-Amping via Quad's Ampbus bus, RCA phono input sockets, an input selector switch and terminals for connection to one pair of loudspeakers.

    Features
    • 85w per channel into 8 ohms.
    • Extensive flexibility for system expansion with 77 AMPBUS.
    • Bi-amplification and tri-amplification via QUAD 77 AMPBUS.
    • Fully protected against overload.
    • Phono sockets for use with other pre-amplifiers.

    Specification  
    Power output per channel: 85w into 8Ω (THD<0.05%)
    115w into 4Ω (THD<0.05%)
    Maximum Current Output: 11A peak per channel
    Distortion (total harmonic): 20Hz any level up to 70w <0.05% (22KHz bandwidth)
    1KHz any level up to 70w <0.05% (22KHz bandwidth)
    20KHz any level up to 70w <0.05% (80KHz bandwith)
    Continuous sine wave into 8Ω resistive load
    Input Sensitivity Phono Input 775mV
    77 AMPBUS 2V
    Output impedance
    and DC offset    		 1.5µH in parallel with 0.05Ω
    DC offset <20mV
    Frequency Response 10Hz - 20KHz +0dB/-0.3dB
    3Hz - 50KHz +0dB/-3dB
    Power Response
    (Ref. 1KHz)    		 10Hz - 20KHz +0dB/-0.75dB
    Cross talk <-90dB at 1KHz
    Hum and Noise -105dB ref. 75w (10Hz - 22KHz measurement bandwidth)
    Stability Unconditionally stable with any load and any signal

    Power requirements
    110-120V or 220-240V AC 50/60Hz
    Power consumption:  30-350 VA, depending on signal level.

  • Net weight (2.2 lb = 1 kg)
  • 6.3 kg / 13 lb 14 oz (13.877 lb)
  • Literature/Schematics (1)
  • - - Manufacturers Literature (77 Power Amplifier Data Sheet)
  • Literature/Schematics (2)
  • - - Manufacturers Literature (77 Stereo Power Amplifier Instruction Book)
  • Author
  • Model page created by Howard Craven. See "Data change" for further contributors.

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