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Stereo Preamplifier with balance and loudness

2017-01-01 14:59  
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Stereo Preamplifier with balance and loudness
The circuit of preamplifier use the 5533 chip and features a combination of controls balance and volume. Due to the nonlinearity of the human auditory system, low frequencies must be boosted at low listening levels. Level pay, and LOUDNESS controls provide all the plays to produce the desired response from the music. Source: discovercircuits