PreSonus FireStudio Tube - Manual (Page 33)

CONTROLS AND CONNECTIONS
30 | PreSonus 2008
3.3 BACK PANEL LAYOUT
 Microphone Preamplifier. Your FireStudio Tube is equipped with eight custom designed PreSonus
XMAX microphone preamplifiers for use with all types of microphones (including dynamics, condensers,
and ribbons). As well as instruments and line-level signals. The PreSonus preamplifier design employs a
Class A input gain stage. This arrangement results in ultra-low noise and wide gain control, allowing
you to boost desirable signal without increasing unwanted background noise.
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+14 dBu Headroom. The FireStudio Tube microphone preamplifier has +14 dBu headroom.
This feature gives you wide dynamic range and excellent transient-response characteristics.
 Line Inputs. Channels 9-14 of your FireStudio Tube are line-level inputs. They are designed to accept
up to a maximum input level of +20 dBu. Use these inputs to connect your line-level devices, such as
synthesizers, amp-modeling hardware, and vocoders. In general, line-level devices have their own
volume controls. As these inputs are for line-level signal only, there is no trim control for them on the
FireStudio Tube. If you need to raise or lower the volume, the adjustment should be made from your
line-level device.
A note about vintage devices: Some older line-level devices may not output a hot enough signal. If you
find this to be the case, you should connect them to a direct box and plug the mic-level (XLR) output of
the direct box into the FireStudio Tube microphone inputs.