4 DESCRIPTION
Nowadays, the Fairchild compressor is the most expensive classical professional
audio device and its price reaches $30,000.
Not only has the Lipinski Sound L-629 Compressor the same principle of
operation, but also has the slightest distortion and the best microdynamics
compared to other available products.
L-629 Compressor's principle of operation is identical to the legendary Fairchild
compressor:
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In both compressors output signal is detected, which results in loading the
compressing capacitor,
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In both devices the higher the voltage on the compressing capacitor is, the
lower the gain is.
However, the Fairchild compressor, assembled over 50 years ago, has significant
distortion and quite low dynamics.
To improve that, the new method of gain adjusting has been devised and patented.
However in the Lipinski L-629 compressor, variable resistance of the
semiconductor circuitry effecting gain changes. This patented circuitry does not
add any distortion to the signal.
The gain control unit is symmetrical in both of the devices, although the
nonlinearity of the variable transconductance vacuum tubes is far higher than in L-
629's patented circuitry.
Moreover, in Fairchild compressor, apart from significant distortion, low dynamics
and the nonlinearity, there are 4 transformers and a few serial capacitors in the
signal path. As a result of this, the Fairchild compressor adds 1% distortion with
the dynamics of only 70 dB.
Compared to the Fairchild, the L-629 has an 0,04% distortion when maximum
compression ratio and input signal level at +10 dB is applied. In addition its
dynamics reach 100 dB (noises are 30 dB lower than in the Fairchild).
Not only has the L-629 no IC's in the signal path but also its signal path contains
no transformers and capacitors. The L-629 is designed using pure A class
components, with minimum feedback, making the microdynamics outstanding.
In addition, the nonlinear distortion can reach 10%, when low-frequency signal is
applied and short Release Time is set, which is a problem for all compressors.
Innovative circuitry in the L-629, which eliminates such distortion thoroughly, has
been devised and patented. No other analogue compressor has such a feature.
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