CONTROLS & CONNECTIONS
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PreSonus 2008
3.2 FRONT PANEL LAYOUT
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SuperChannels.
Your FireStudio Tube is equipped with two “SuperChannels”. These channels are
Class A Vacuum Tube microphone and instrument preamplifiers and full-featured analog limiters. Each
channel has its own controls.
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Neutrik Combo Connectors.
Both SuperChannels have a Mic/Line connector using the Neutrik
Combo connector. This revolutionary style connector lets you use either ¼” phone or XLR
connectors in the same female input. Channels 15 and 16 of FireStudio Tube are ¼”
instrument and microphone XLR inputs.
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48 Volt Phantom Power.
Each SuperChannel has 48V Phantom power available individually
via its push button switches on the front panel.
XLR connector wiring for Phantom Power
Pin 1 = GND
Pin 2 = +48V
Pin 3 = +48V
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Input Gain/Trim Control.
This knob provides the following gain structure:
54dB of variable gain (+4dB to +58dB)
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Drive.
This knob controls the amount of signal routed to the 12AX7 vacuum tube. This feature
lets you control the amount of tube saturation. Greater levels of tube saturation give the signal
greater warmth and a richer sound. This works equally well on microphones and instruments.
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Limiter.
This knob sets the threshold of the analog limiter from -18dBfs to 0dBfs (-8dBu to
+10dBu). The threshold is the point at which the limiter will engage. No more of the input
signal will be allowed to pass through once this threshold is reached. Thus reducing the gain.
Turning the knob clockwise increases the threshold -- allowing more of the input signal
through. Turning the knob counter-clockwise decreases the threshold -- allowing less of the
input signal through.
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Gain Makeup.
This knob adjusts the gain after the limiter threshold. This is used to
compensate for gain reduction, raising the gain of the output signal without raising the limiter
threshold. This is especially useful when using the limiter as an effect to over compress the
signal. By using the Gain Makeup knob, you can set the threshold extremely low and still
maintain a strong signal to record.
Summary of Contents for FIRESTUDIO TUBE
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