INTRODUCTION
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Thank you for purchasing Sound Scourge equipment. The equipment you now own is result of
many hours of research and development as well as multiple recording and playback tests.
The NV73pq preamplifier is a transistor device with a signal path based solely on discrete elements.
The preamplifier has a transformer balanced microphone input with a high impedance instrumental
input. The preamplifier’s signal output is transformer balanced as well. All the preamp blocks work
in class A.
The equalizer, based on inductive elements, is an integral part of the device. The frequencies of its
filters have been carefully selected to enable creative use of the preamplifier during recording as
well as subsequent recording of audio material.
We have taken a rigorous approach to both components and sound of the preamplifier. The device
is manually assembled from selected parts characterized by a narrow parameter tolerance.
The signal path has been reduced to its minimal length and the signal is guided through top class
rotary switches. Switching impedance, signall phase, etc. is accomplished by hermetically sealed
signal relays.
The screened-off power supply has an ample power reserve, which results in stable operation of
the device. NV73pq casing is made of anodized aluminium and all elements are machined with
high accuracy.
Rev. C
