Quad 707 Power Amplifier 7777

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

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  • Year
  • 1995 ?
  • Category
  • Audio Amplifier or -mixer
  • Radiomuseum.org ID
  • 317768

 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) / 100; 110-120; 220-240 Volt
  • Loudspeaker
  • - This model requires external speaker(s).
  • Power out
  • 240 W (440 W max.)
  • Material
  • Various materials
  • from Radiomuseum.org
  • Model: Quad 707 Power Amplifier 7777 - Quad Brand; Acoustical
  • Shape
  • Book-shelf unit.
  • Dimensions (WHD)
  • 321 x 140 x 238 mm / 12.6 x 5.5 x 9.4 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 for connection to other 707 Power Amplifiers for Bi-Amping/Tri-Amping via Quad's Ampbus bus. RCA phono input sockets, Neutrik Speakon sockets for connection to one pair of loudspeakers and a current overload trip reset button.

    Features
    • Based on the Quad patented current dumping' technology.
    • Phono sockets for use with non-77 products.
    • Bi-amplification and tri-amplification via Quad-link cable.

    Specification  
    Power output: 120W per channel into 8Ω, 14A peak
    220W per channel Into 4Ω, 14A peak
    Distortion (Dtot.) <0.01% at 20Hz any level up to 120w
    <0.01% at 1KHz any level up to 120w
    <0.03% at 20KHz any level tip to 120w
    Continuous sine wave into 8Ω resistive load.
    Output, internal impedance
    and DC offset:    		 1.5µH in series with 0.05Ω,
    DC offset typically 7 mV.
    Frequency Response -0.25dB at 20Hz and 20KHz, ref. 1 KHz
    -1.0dB at 13Hz and 40KHz, ref. 1 KHz
    Power Response -0.25dB at 20Hz and 20KHz, ref. 1 KHz
    Input Sensitivity 775mV for 140W into 8Ω
    Input Impedance 20kΩ
    Input overload Instantaneous recovery up to +15dB overload
    Cross talk
    (Input loaded by 1 kOhm)    		 -80dB at 1KHz
    -65dB at 10KHz
    Hum and Noise Unweighted - 105dB ref. 140w
    (15.7 KHz measurement bandwidth)
    Stability Unconditionally stable with any load and input.

    Power requirements
    100, 110-120 or 220-240V AC 50/60Hz
    Power consumption:  35-750w, depending on signal level.

  • Net weight (2.2 lb = 1 kg)
  • 12 kg / 26 lb 6.9 oz (26.432 lb)
  • Literature/Schematics (1)
  • - - Manufacturers Literature (707 Power Amplifier Data Sheet)
  • Literature/Schematics (2)
  • - - Manufacturers Literature (707 Stereo Power Amplifier Instruction Book)
  • Author
  • Model page created by Howard Craven. See "Data change" for further contributors.

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