PreSonus M80 - Manual (Page 7)

OVERVIEW
5
phase reverse switch allows the operator to avoid phase cancellation when
identical microphones are used in close proximity to one another. The phase
reverse switch also can compensate for different XLR connector hook-ups where
pin connections have been inverted.
• A 20 dB pad is available on each channel for reducing the in-coming signal
level. This pad provides a more manageable signal from high output devices
giving the operator greater control over the in-coming signal and a much
reduced chance of over-driving the input and thereby avoiding distortion.
• The M80 has +28 dBu of headroom on each channel. This feature gives you a
very wide dynamic range and excellent transient response characteristics.
• A Rumble filter is located on each channel to eliminate low frequency noise.
This lets you greatly reduce background noise such as air conditioners or wind
noise with the flick of a switch without effecting the desired frequencies.
• Each channel of the M80 has a Mic/Instrument connector using the Neutrik ®
Combo connector. This revolutionary new style connector lets you use either
1/4” phone or XLR connectors in the same female input.
• The M80 offers a high quality transformer on each channel. These feature an
IDSS 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 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”)
• The M80 has a stereo mix bus for combining the input signals assigned to the
bus using the L/R function switch on the front panel of the M80. A pan knob
allows the placement of the selected signal anywhere in the stereo array of the
stereo mix bus out-going signal (i.e.- left; left-center; center; right-center or
right).
•
Inserting stereo headphones into the jack on the front panel of the M80 enables the
user to monitor the signals assigned to the Mix bus. Ample power has been
provided to allow the operator to hear the processed signals in loud ambient noise