PRESONUS GTX 44 Technical Specifications

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PreSonus Audio Electronics, Inc.
7257 Florida Blvd. | Baton Rouge, LA 70806
Phone: 225-216-7887 | Fax: 225-926-8347
sales@presonus.com | www.presonus.com
GTX44
Quad Gate/Expander with DSP Sidechain & Frequency Dependent Filters
The PreSonus Audio Electronics GTX44 sets a new standard in multi-channel dynamics processing.
PreSonus has been an innovative leader in dynamics processing since its inception. This line of
quad dynamics processors shows our commitment to the market and to the creative audio
professionals we work with everyday. We've listened to what our customers have said and given
the industry what it has asked for. The GTX44 presents itself as an attractively styled Noise
Gate/Expander. But beauty is not skin deep with the GTX44, it goes down into every circuit on
the surface mount boards and DSP code. The GTX44 is a hybrid VCA, analog dynamics processor
under digital control with DSP flexibility. Digital sidechain processing allows PreSonus to program
multiple functions that can be applied simultaneously such as filtering, ducking, and other special
function processing.
Based on demands from professional FOH engineers, the GTX44 control surface provides a truly
professional feature set that rivals the most expensive gates in the world. Threshold, Ratio, Attack,
Release and Hold controls are the necessities. The GTX44 can be used either as a noise-gate or
downward expander. The GTX44 employs high-pass and low-pass filter potentiometers for pinpoint
frequency 'windowing', which control the specific frequency range over which the gate will open.
There is a sidechain monitor listen button that allows for the operator to 'hear' what frequency
range the gate is operating within. The DSP aspect of the GTX44 brings to bear new technology
in dynamics processing. For instance, our Zero-Crossing circuit will render the gate absolutely
'click-less'! Zero-crossing is the function by which the opening of the gate is predicated upon the
existence of a zero amplitude line where an audio signal is 0 volts for an instant. The zero-crossing
circuit detects the instant at which the audio crosses that line (provided it is above the set threshold)
and allows the gate to open only then. The result is that the gate is already open when the signal
crosses the 'gate open' threshold and prevents chattering on quick attack-time gate settings. A
special 'duck' mode allows for ducking via the gate sidechain input.
Adjacent channels are stereo linkable. The rear panel of the GTX44 is well thought out with external
sidechain insert on every channel. The unbalanced I/O is on a single TRS jack, which facilitates
a single cable for getting into and out of the GTX44. A 'flip' button is provided that 'flips' the 'tip
and the 'ring' on the 1/4" jack to match the wiring preference of your console's manufacturer.
Balanced Input and Output are XLR. Internal power supply, +4/-10dBv selector, lighted function
buttons, 10 segment gain reduction meters, all steel chassis, one rack space.
• Hi/Low-Pass Filter Control for Frequency Dependent Gating/Expansion
• Professional Feature Set, with Hold time control and Sidechain Monitor
• Single button Duck feature
• Zero-Crossing Circuit for truly 'Clickless' Operation
• Flexible and comprehensive I/O: Balanced XLR, 1/4" TRS, Insert for External Sidechain
• 10 Segment Gain Reduction LED
• Backlit Function Buttons
• Internal Power Supply