
1967年,国都推出了该公司历史上第一套晶体管放大器QUAD 33前置放大器及QUAD 303功率放大器。这套放大器在音响技术发展史上的意义在于它应用了“三阶输出级”设计,将当时晶体管元件普遍存在的热不稳定性完全消除。由于该套放大器在电路设计及外形制造工艺上的成就,它赢得了英国设计学会于1969年颁发的“设计大奖”。
器材规格
Form Monophonic power amplifier
* It is a build-out value at the time of driving both channels simultaneously.
An output and a distortion
(An 8-ohm load intensity, sine-wave input) It is 0.03% or less at the time of 100Hz and 45W output.
It is 0.03% or less at the time of 1kHz and 45W output.
It is 0.03% or less at the time of 10kHz and 45W output.
Output internal impedance They are 2000 micro F and 6 microhenries to 0.3 ohm and a single row.
Frequency characteristic (1kHz criteria, 8-ohm load intensity) 30Hz - -35kHz one dB
Input sensitivity 0.5V (at the time of 8-ohm load-intensity and 45W output)
Input impedance 22kohm//60pF
The maximum input limit If an input signal is to +20dB, it returns in an instant.
Crosstalk (at the time of the input load intensity of 1kohm) 60dB or more (30Hz - 10kHz)
SN ratio - 100dB (at time of A correction)-95dB (with no correction)
Power-source input 100-130V, 200-250V, 50 to 60 Hz
Dimensions Width 120x height 159x depth of 324mm
Weight 8.2kg
* It is a build-out value at the time of driving both channels simultaneously.
An output and a distortion
(An 8-ohm load intensity, sine-wave input) It is 0.03% or less at the time of 100Hz and 45W output.
It is 0.03% or less at the time of 1kHz and 45W output.
It is 0.03% or less at the time of 10kHz and 45W output.
Output internal impedance They are 2000 micro F and 6 microhenries to 0.3 ohm and a single row.
Frequency characteristic (1kHz criteria, 8-ohm load intensity) 30Hz - -35kHz one dB
Input sensitivity 0.5V (at the time of 8-ohm load-intensity and 45W output)
Input impedance 22kohm//60pF
The maximum input limit If an input signal is to +20dB, it returns in an instant.
Crosstalk (at the time of the input load intensity of 1kohm) 60dB or more (30Hz - 10kHz)
SN ratio - 100dB (at time of A correction)-95dB (with no correction)
Power-source input 100-130V, 200-250V, 50 to 60 Hz
Dimensions Width 120x height 159x depth of 324mm
Weight 8.2kg
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