Guardian Audio DX480 User manual

DX Loudspeaker Controller User Manual
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Important Safety Instructions
1. READ AND KEEP THESE INSTRUCTIONS
All the safety and operating instructions should be read before the product is operated. The
safety and operating instructions should be retained for future reference.
2. HEED ALL WARNINGS
All warnings on the product and in the operating instructions should be adhered to.
3. DO NOT USE THIS APPARATUS NEAR WATER
4.CLEAN ONLY WITH DRY CLOTH
Unplug the unit from the wall outlet before cleaning. Do not use liquid cleaners or
aerosol cleaners. Use a damp cloth for cleaning.
5. DO NOT BLOCK ANY VENTILATION OPENINGS
Slots and openings in the cabinet back or bottom are provided for ventilation, to ensure
reliable operation of the limit and to protect it from overheating. These openings must not
be blocked or covered. The openings shouldnever be blocked by placing theproduct on a
bed, sofa, rug, or similar surface. Thisproductshould not be placed in a built-in installation such
as a bookcase or rack unless properventilation is provided orthe manufacture's instructions
have been adhered to.
6. DO NOT INSTALL NEAR ANY HEAT SOURCES
This Product should be situated away from heat sources such as amplifiers or other products
that produce heat.
7. DO NOT DEFEAT THE SAFETY OF THE POLARIZED OR GROUNDING-TYPE PLUG
A Polarized plug has two blades with one wider than the other. A grounding-type plug has
two blades and a third grounding prong. The wide blade or the third prongs are provided
for your safety. If the provided plug does not fit into your outlet, consult an electrician for
replacement of the obsolete outlet.
8. PROTECT THE POWER CORD FROM BEING WALKED ON OR PINCHED AT PLUGS, CONVENIENCE
RECEPTACLES, AND THE POINT WHERE THEY EXIT FROM THE APPARATUS.
9. ONLY USE ATTACHMENTS/ACCESSORIES SPECIFIED BY THE MANUFACTURER.
10. USE ONLY WITH CART, STAND, TRIPOD, BRACKET, OR TABLE SPECIFIED BY THE
MANUFACTURER, OR SOLD WITH THE APPARATUS. WHEN A CART IS USED, USE
CAUTION WHEN MOVING THE CART/APPARATUS TO AVOID INJURY FROM TIP-OVER.
Do not place this unit on an unstable cart, stand, tripod, bracket, or table. The unit may
fall, causing serious injury to someone, and serious damage to the appliance. A unit and
cart combination should be moved with care. Quick stops, excessive force, and uneven
surfaces may cause the product and cart combination to overturn.
11. UNPLUG THIS APPARATUS DURING LIGHTNING STORMS OR WHEN UNUSED FOR
LONG PERIODS OF TIME.
For added protection for this unit during a lightning storm, or when it is left unattended
and unused for long periods of time, unplug it from the wall outlet and disconnect the antenna
or cable system. This will prevent damage to the unit due to lightning and power line surges.
12. REFER ALL SERVICING TO QUALIFIED SERVICE PERSONNEL.
13. WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPARATUS
TO RAIN OR MOISTURE.

DX Loudspeaker Controller User Manual
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Table of Contents
Table of Contents ................................................................ 3
1.0 Introduction ....................................................................4
2.0 Features ..........................................................................5
3.0 Front Panel Functions ...................................................6
4.0 Rear Panel Functions .................................................... 8
5.0 Powering Up the Device .............................................. 8
6.0 Operating the Device ..............................................…. 9
6.1 Input/Output menus............................................................ 9
6.2 System Menus...............................................................12
7.0 QuickReference.............................................................16
8.0 PC Control Software ................................................... 17
9.0 Specifications................................................................18

DX Loudspeaker Controller User Manual
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1.0 Introduction
The DX series is a digital loudspeaker management system designed for
the touring or fixed sound installation markets. The absolute latest in
available technology is utilized with 32-bit (40-bit floating point ) processors
and high performance 24-bit Analog Converters. The high-bit DSP prevents
noise and distortion induced by truncation errors of the commonly used 24-
bit fixed-point devices. A complete set of parameters include I/O levels,
delay, polarity, 6 bands of parametric EQ per channel, multiple crossover
selections and full function limiters. Precise frequency control is achieved
with its 1 Hz resolution. Inputs and outputs can be routed in multiple
configurations to meet any requirement. The DX series can be controlled or
configured in real time on the front panel or with the intuitive PC GUI
accessed via the USB or RS485. Software upgrade for CPU and DSP via
PC keeps the device current with newly developed algorithms and functions
once available. Multiple setup storage and system security complete this
professional package.
Shipped contents:
- DX-240/260/360/480 unit
- DxDrive CD (incl. User Manual & PC Software)

DX Loudspeaker Controller User Manual
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2.0 Features
z32-bit (40-bit floating point) DSP (Highly accurate digital processing)
zHigh Performance 24-bit A/D and D/A Converters
zAccurate 1 Hz Frequency Resolution.
z6-Band Parametric Equalizers for each Input and Output
zFull-Function Limiters on Output Channels
zOne Touch” easy access setup button
zBacklit 4-Line x 32 Character LCD Display
zFull 5-segment LEDs on every Input and Output
zStorage up to 30 Program Setups
zUSB and RS-485 interfaces for PC Control and Configuration
zPink noise and single frequency generator
zOriginal Neutrik XLR connectors
zSecurity Lock

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3.0 Front Panel Functions
1. USB – a standard Type B USB connector. Proper device driver must be
installed prior to usage.The red LED will indicate the USB cable is
connected.
2. Mute keys – Mute/Unmute input and output channels. When an input
channel is muted, a red LED will come on for indication.
When Menu Control key is pressed, it selects the corresponding
channel for the LCD menu display and is acknowledged by a green LED
above the button. The last modified menu will be displayed on the LCD.
While the Menu Control key is held down, multiple channels can be
linked or unlinked by pushing the desired channels. This eases
programming for same parameters across multiple channels. Multiple
Inputs can be linked together and multiple outputs can be linked
together. Inputs and Outputs are linked separately.
3. Peak Level LED - Indicates the current peak level of the Signal:
Signal, -12dB, -6dB, -3dB, Over/Limit. The Input Over LED refers to
the device's maximum headroom. The Output Limit LED references to
the threshold of the limiter.
4. Menu keys - There are 8 menu keys for Signal-Gain/Phase/Delay, EQ,
X’over (Crossover), Limiter, Channel (Input Mix), Name (Channel name) for
each input/output channel,and System and Exit control for main system.
12
3
5
467

DX Loudspeaker Controller User Manual
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4.0 Rear Panel Functions
1. Main Power - Connects via a standard IEC socket. A compatible power
cord is supplied with the unit. The voltage input is 90-240VAC, 50-60Hz.
2. Main Fuse - T2.5A-250V. Slow blow type.
3. Power switch - Controls power On/Off.
4. RS485 – Allows remote control the device up to 1000M.
5. XLR input and outputs - Separate 3-pin XLR connectors are provided
for each audio input and output. The device's output stage employs the
balanced impedance topology. All I/O connectors have pin 1 as ground
(shield), pin 2 as + and pin 3 as -.
5.0 Powering Up the Device
• After powering up the unit, the following initialization screen is displayed
on the LCD:
• The initialization process takes about 8 seconds and during that period
the unit boots and displays the device model and firmware version.
• After the initialization process is finished the DX displays its main screen:
• The screen shows the current program number and program name
assigned to the unit. If the 2 fields are empty, it means that no program
is assigned, the last data before previous power down is recalled instead.
• Now the DX is ready to operate.
** DX Series **
DX-480 v1.00
DEVICE : 1
PROG (U):1
(U)> User program (F) factory program
5 Output42 13 5 Input

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6.0 Operating the Device
Tips: Channel Linking – While holding down the Mute for 2 seconds,
more than 1 channel from the same group (Input or Output group) can be
selected to link the channels together. The green LEDs above the Mute
buttons are lit for the linked channels. Any modification of the data for the
selected channel will be applied to the linked channels as well. To cancel
the linking, simply deselect the desired channel if the Mute key is
still pressed.
6.1 Input menus
Each of DX input channel has a separate Mute key. Hold down the Mute
key for 2 secondsthen the Channel menu can be use and the green LEDs
above the Mute button are lit.
One Touch easy access setup button
DxDrives8 one touch setup buttonsletthe user easily direct control
for Signal, EQ, X over, Limiter, Channel, Name for each input/output, and
System and Exit button.
-Signal-Gain/Phase/Delay - Signal parameters
• LEVEL - Gain, -40.00dB to +12.00dB in 0.1dB steps.
• POL - Polarity, can be normal (+) or inverted (-).
• DELAY - Delay in 21us steps. Can be displayed in milliseconds, feet or centimeters.
The time unit of the delay can be changed in the System menu. The
maximum delay permitted is 1000ms.
OUI_1:XXXXXX MENU:Signal
LEVEL:0.00dB
POL :+
DELAY :0.105ms

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-EQ - EQ parameters
• EQ# - Selects one of the 6 available Equalizers.
• LEVEL - EQ level gain. Ranges from -30.00dB to +15.00dB in
0.1dB steps.
• FREQ - EQ center frequency. Ranges from 20 to 20,000Hz in either
1Hz steps or 1/36 octave steps
• BW - EQ Bandwidth. Ranges from 0.05 to 3.00 octaves in steps of 0.01
octave steps for PEQ.The Q value is automatically shown beneath the
octave value. For Lo-Sht or Hi-Shf, it is either 6 or 12dB/Oct.
Type - Type of EQ. The types can be parametric (PEQ), Lo-shelf
(Lo-shf) and Hi-shelf (Hi-shf).
.
OUT_1:xxxxxx MENU: EQ
EQ#:EQ1 BW:0.50OCT
LEVEL:0.00dB Q=28.85
FREQ : 1000HZ TYPE:PEQ
-X Over - Crossover Parameters
• FTRH - Filter Type of low frequency crossover point (high pass).
Types can be Butterworth, Linkritz Riley or Bessel.
• FRQH - Filter cut-off Frequency of low frequency crossover point
(high pass). Ranges from 20 to 20,000Hz in either 1Hz steps or
1/36 octave steps. The frequency steps can be selected in the
• SLPH - Filter Slope of low frequency crossover point (high pass).
Ranges from 12 to 48dB/octave. If the selected Filter Type is
Linkritz Riley, the available slopes are 12 / 18 / 24 / 48 dB/octave.
• FTRL - Filter Type of high frequency crossover point (low pass).
• FRQL - Filter cut-off Frequency of high frequency crossover point
(low pass)
• SLPL - Filter Slope of low frequency crossover point (high pass).
Ranges from 12 to 48dB/octave. If the selected Filter Type is
Linkritz Riley, the available slopes are 12 / 18 / 24 / 48 dB/octave.