PRESONUS Eureka User Manual page 6

greater control over the in-coming signal and a much reduced chance of
over-driving the input and avoiding distortion.
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+22dBu Headroom. The EUREKA mic-pre has +22 dBu of headroom.
This feature gives you wide dynamic range and excellent transient response
characteristics.
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Saturation Control. The EUREKA offers a very high quality transformer and
features an SATURATION control (this control adjusts the drain current on
the input FET amplifier altering the even harmonic levels of the signal being
passed) with an adjustment range of 0% to 100%. The 0% position passes
a pure signal. As the control is rotated to the 100% position, the signal' s
even harmonic series is boosted giving the signal " warmth" very much like a
vacuum tube or similar to the sound of analog tape saturation. This
remarkable effect gives you the sound of a tube without the headache of
uneven performance often encountered with vacuum tube devices (" no tube
to pick-up RF or to age and become "microphonic" ).
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Variable Microphone Input Impedance. This feature enables you to " tune"
your microphone – by matching the output impedance of your microphone
with your microphone preamplifier. This works especially well for ribbon
microphones. Changing the input impedance is also effective for dynamic
and condenser microphones and can be the perfect solution for a given
recording application.
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Phase Reverse. Use the phase reverse switch to combat phase
cancellation with other open microphones.
Full Featured Compressor with High Pass Filter. The EUREKA is
equipped with a Compressor with a high pass side chain filter designed
especially for frequency specific processing.
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Soft Knee Compression. Soft Knee Compression causes the
compression to set in gradually producing a more musical response
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Bypass. The Bypass switch lets you compare the compressed
sound quickly to the uncompressed sound.
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OVERVIEW