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In contrast to many modern hifi components, it has a useful range of tone controls. Not only treble and bass boost and cut but also high frequency filters controllable for frequency and slope which are intended to improve the sound of low quality sources.
翻譯(與許多現代的高保真音響相比,它具有一系列真正有用的音調控制。不僅高音和低音能夠增強和降低,而且高頻濾波器可控制頻率和斜率,以改善低質量音源的聲音)
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The filter is essential with modern good quality speakers and helpful at any time.
It removes surface noise, tracing distortion and similar shortcomings in the upper frequency range of the recording or broadcast, and the two control filter system achieves this to a very fine degree without intruding unnecessarily into the harmonic range so essential for realistic reproduction.
Classic Quad 33 Preamplifier Specifications:
Operation: 200-250V ~ 50/60Hz
Frequency response : 30Hz to 20kHz
Total harmonic distortion: 0.02%
Input sensitivity: 2mV (MM), 100mV (ceramic), 100mV (line)
Signal to noise ratio: 70dB (MM), 85dB (line)
Output: 100mV (line), 0.5V (Pre out)
Dimensions: 260 x 92 x 165mm
Weight: 3kg