XTA 4 Series User manual

1.10

Page 2 4 Series
4 Series 4 Series
4 Series Operator’s Manual

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4 Series 4 Series
4 Series Operators Manual Page 3
4 Series
4 Series4 Series
4 Series Quick Reference
Editing channels : press channel’s GAIN key. First press accesses
that channel’s gain. To scroll through channel’s parameters, use the
BACK and NEXT keys. Second press accesses last viewed parameter.
Third press will drop back to the default screen.
Accessing menus: press the MENU key. Use the BACK and NEXT
keys to select the sub-menu re uired, and enter the sub-menu using
the ENTER key. This applies to all levels of menu. ENTER always
confirms selections.
The Menus and their Contents
GLOBAL MEMORY
GLOBAL MEMORY GLOBAL MEMORY
GLOBAL MEMORY Sub-menu: Recall/Store/Erase input, graphic
and crossover settings, or combinations of.
INPUT SECTION
INPUT SECTIONINPUT SECTION
INPUT SECTION Sub-menu: Set up input ganging, and GEQ ‘Q’
setting.
CROSSOVER
CROSSOVERCROSSOVER
CROSSOVER Sub-menu: Set up or adjust crossover design,
including routing and auto limiter setting. Also set up output ganging.
INTERFACE
INTERFACEINTERFACE
INTERFACE Sub-menu: Comms interface setup (RS232 and
RS485), G.P.I. interface configuration, and wireless interface.
SYSTEM
SYSTEM SYSTEM
SYSTEM Sub-menu: Used to view unit’s status, and select various
global options such as PEQ ‘Q’ or bandwidth units, delay units, and
output metering point (pre/post mute).
SECURITY
SECURITY SECURITY
SECURITY Sub-menu: Used for locking various operations of the
unit, using a 4 digit code.
AES/EBU
AES/EBU AES/EBU
AES/EBU Sub-menu: Switch outputs from analogue to digital and
monitor AES input status info. (AES inputs are switched via rear panel.)
Notes
The crossover (output) settings may be stored independently of the
input settings and graphic EQ, using the Global
GlobalGlobal
Global Memory
MemoryMemory
Memory sub-
menu.
The output meters show level, in dB from the limiter threshold, and
the input meters show level from clipping the A-D converters,
pre-gain and all EQ.
The high and low pass crossover filters are defined independently on
each output channel.
To access the limiter attack and release parameters, select
“AutoLimiter TimeCst: No” when designing a crossover.
To swap parametric filter units between bandwidth (‘BandW’) and
‘Q’, enter System
SystemSystem
System Sub-menu, select ‘Filter Q / Bandwidth’, and
select re uired readout units.
To swap delay time units, enter System
SystemSystem
System Sub-menu, select ‘Delay
Time / Distance’, and select re uired readout units.
Pressing an EDIT key flashes corresponding channels routed to / from
that channel.

Page 4 4 Series
4 Series 4 Series
4 Series Operator’s Manual
ontents
Important Safety Information 6
Thanks 7
Unpacking the unit 7
Introduction 8
Features 8
Front Panel Familiarisation 9
Rear Panel onnections 10
Operating the 4 Series
4 Series4 Series
4 Series 11
Note about operation with AudioCore software. 11
Start-up procedure 11
Preliminary Set-up 11
Input Channel Makeup 12
Output Channel Makeup 12
Preset Routing Configurations (DP448 shown) 12
Free Assign Routing 15
Input Gain 16
Base Delay 16
Input Graphic EQ 16
Input Parametric EQ 16
Output Gain 17
Output Polarity 17
Output Delay 17
Output High Pass Filter 18
Output Low Pass Filter 18
Output Parametric EQ 18
Output Limiter 19
Output “D-Max” (Clip) Limiter 19
Input Ganging and Output Ganging 20
Menu System Overview 21
Menus in Detail 23
Memory Structure 24
Remote ontrol Interface Operation 26
RS232 Interface 26
RS232 Connection (Single Unit) 26
Loading New Software via a PC 27
RS232 Connection (Multiple Units) 27
Shadow ID Numbers 28
RS485 Connection 29
AES Inputs and Outputs 31
AES Input 31
AES Output 31
AES Diagnostics and Status Information 32

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Operators Manual Page 5
Security and Locking 33
Entering the Password to Complete the Locking Operation 33
Unlocking the Unit 34
Forgotten the Password? 34
P M IA ard and ompact Flash ard Usage 35
Preset Library Updates via the card 35
Unit Software Updates via the card 35
Unit Cloning 36
Copying Unit Software and Preset Files 36
Copying Data from Source nit 36
Loading Data into Destination nit 36
Cold Start Reboot Procedure 36
Advanced Audio Features 37
Graphic E ualiser Behaviour 37
The “GQ600” behaviour 37
The “Special” behaviour 38
Program Limiter and “D-Max” Limiter 39
Program Limiter 39
“D-Max” Clip Limiter 40
Setting Accurate Limiter Thresholds 42
Crossover Filter Slopes 43
Time Alignment 43
Parametric Filter Types and Their Uses 44
Standard Parametric EQ 44
Shelving EQ (High Shelf shown) 45
Creating a Flat-topped EQ Response 45
Notch Filter 46
All Pass Filter 47
Phase Filter 47
Low/High Pass Variable ‘Q’ Filter (Low Pass shown) 48
Elliptical filters 49
Specifications 50
Warranty 51
Options and Accessories 51
Index 52
Appendix I – DP446 Default rossover onfigurations 54
Appendix II – DP444 Default rossover onfigurations 55
Appendix III – DP424 Default rossover onfigurations 58

Page 6 4 Series
4 Series 4 Series
4 Series Operator’s Manual
An example of this e uipment has been tested and found to comply with the following European and
international Standards for Electromagnetic Compatibility and Electrical Safety:
Radiated Emissions (EU): EN55013-1 (1996)
RF Immunity (EU): EN55103-2 (1996) RF Immunity, ESD, Burst Transient, Surge, Dips &Dwells
Electrical Safety (EU): EN60065 (1993)
Important Safety Information
Do not remove overs.
No user serviceable parts inside, refer servicing to qualified service personnel.
This equipment must be earthed.
AUTION
RISK OF ELE TRI SHO K
DO NOT OPEN
DO NOT EXPOSE TO RAIN, MOISTURE,
DRIPPING OR SPLASHING
ATTENTION
RISQUE DE HO ELE TRIQUE
NE PAS ENLEVER
NE PAS EXPOSER A LA PLUIE NI A L’HUMITE
Objects containing li uids, such as vases, must not be placed on this e uipment.
It should not be necessary to remove any protective earth or signal cable shield connections.
Do not defeat the purpose 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 wider blade and the third prong are
provided for your safety. When the provided plug does not fit into your outlet, consult an electrician for replacement of
the obsolete outlet.
Only use this e uipment with an appropriate mains cord.
In the USA the cord should comply with the re uirements contained in the Standard for Cord Sets and Power Supply
Cords, UL 817, be marked VW-1, and have an ampacity rating not less than the marked rating of the apparatus.

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Operators Manual Page 7
Thanks
Thank you for choosing an XTA 4 Series for your application. Please spend a little time reading through this manual, so
that you obtain the best possible performance from the unit.
All XTA products are carefully designed and engineered for cutting-edge performance and world-class reliability. If you
would like further information about this or any other XTA product, please contact us.
We look forward to hearing from you in the near future.
Unpacking the unit
After unpacking the unit, please check it carefully for any damage. If any is found, immediately notify the carrier
concerned - you, the consignee, must instigate any claim. Please retain all packaging in case of future re-shipment.
Please think of our environment and don’t bin any materials, including this manual. When the product
has reached the end of its useful life, please dispose of it responsibly through a recycling centre.

Page 8 4 Series
4 Series 4 Series
4 Series Operator’s Manual
Introduction
The 4 Series are powerful DSP based audio processors, ideally suited for install applications, where they combine the
functions of a multitude of conventional products in a compact 1U unit with extensive remote control capabilities. To
achieve this, the units have up to four inputs and eight outputs which can be configured in a selection of basic crossover
modes – 4 x 2 way; 2 x 3 way + 2 Aux; 2 x 4 way; and 1 x 8 way (as applicable to i/o configurations). They also offer a
“free assign” mode, which allows completely flexible routing of any output from any combination of inputs.
Each input has a gain control, variable delay, a 28 band graphic e ualiser and a further eight bands of fully parametric
e ualisation. The parametric filter bands have a large selection of different filter types available, including shelving, notch,
band-pass, phase and elliptical behaviours.
Each output has a gain control, variable delay, high and low pass crossover filters, nine bands of fully parametric
e ualisation, polarity switching and, additionally, a fully featured limiter, and a final clip limiter. The crossover filters offer
slopes of up to 48dB/Octave., with a variety of responses available.
Remote control
1
is catered for in the form of RS232 and RS485 ports, and multiple user memories are provided for the
storage and recall of settings. A GPI interface may also be fitted to allow remote memory recalls using simple switch
closure apparatus.
Security lock-out is available for all controls.
The 4 Series are also e uipped with AES/EBU digital inputs and outputs, and include a sample rate converter, capable of
accepting anything from 32kHz up tp 192kHz.
They may be controlled externally by XTA’s proprietary Windows
TM
software, along with existing and
future ‘AudioCore’ products.
Features
Superb audio uality – carefully optimised double precision signal processing coupled with 24 bit conversion ensure a
dynamic range in excess of 117dB. The high sampling rate of 96kHz means minimal filtering providing exceptional sonic
purity with a bandwidth in excess of 32kHz.
A flexible input/output multi-mode format caters for any configuration, regardless of scale.
Both routing of inputs to outputs, and ganging (for editing) are completely flexible.
A completely new SHARC
TM
based DSP platform supplies phenomenal computational power, allowing the unit to provide
not only multiple bands of standard parametric e ualisation on every input and output, but an additional full spectrum
graphic e ualiser on each of the four inputs. This additional power also permits both program limiters and no overshoot
clip limiters on each output.
Delay of up to 650mS may be independently set for each output, with an exceptionally fine minimum increment of 300nS,
which corresponds to a distance change of 0.1mm!
The comprehensive standard specification also includes up to 255 memories, and remote control via RS232 or RS485
ports, with security lockout.
XTA’s new proprietary Complex Unified Ny uist Truncation algorithm ensures that no matter how much e ualisation is
applied to a channel, there will always be sufficient headroom available to cater for it.
1
Note that only the RS232 and RS485 interfaces offer full remote control of this product – the GPI interface may only be
used for memory recall (program change) purposes.

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Operators Manual Page 9
Front Panel Familiarisation
L D Screen: Shows, by default, the
name of the last recalled memory on the
bottom line of the screen, and the
current routing on the top line. Also
used to show all parameters as they are
edited, and all menu selections.
ontrol Keys: Selection and adjustment of parameters.
NEXT key moves forward through list of parameters.
BACK key moves backwards through list of parameters.
MENU key activates the main menu – a second press selects the last menu edited – a third press selects
the last menu item. In this way, three presses on MENU from the default screen will jump back to the
last parameter adjusted. Selection of different menus is accomplished using the BACK and NEXT keys,
or with the FREQ encoder.
ENTER key enters the chosen menu, confirms selections, and changes filter types when editing
parametric sections.
BYPASS will flatten the currently selected parametric sections, or input graphic e ualisers. Note that,
for safety reasons, it is not possible to bypass the high and low pass filter sections.
QUIT exits menus back to the default screen.
Rotary Encoders: Three velocity sensitive encoders adjust the relevant parameters
as displayed on the screen.
Memory ard Slot: Will accept type I or type II PCMCIA SRAM cards and, using an
adapter, Compact Flash cards. This allows the unit to be cloned, memory sets saved,
presets loaded, and firmware updates installed.
Status LEDs: The four status LEDs show, from left to right, AES inputs selected
(flashing if not locked); AES outputs selected; Comms activity (only illuminates on
messages addressed to this particular unit); and a general-purpose spare indicator.
Input Sections: Control and monitor input signal paths.
Red MUTE buttons illuminate when pressed and mute audio for that channel.
EDIT buttons illuminate yellow when pressed, and access gain on first press, then last
viewed parameter on second press, then exit on third press.
Input meters show dB from clipping point of the analogue to digital converters.
Yellow (0dB) LED illuminates 3dB from clipping. Red CLIP LED may illuminate
independently from the rest of the meter to show digital overflow. All four CLIP
LEDs illuminating indicates internal clipping after the ADC.
Output Sections: Control and
monitor output signal paths.
Red MUTE buttons illuminate when
pressed and mute audio for that
channel.
EDIT buttons illuminate yellow when
pressed, and access gain on first press,
then last viewed parameter on second
press, then exit on third press. Output meters show dB from limiting. The yellow LED illuminates at the onset of
limiting. The red LED illuminates at 4dB into limiting (i.e. 4dB of gain reduction).

Page 10 4 Series
4 Series 4 Series
4 Series Operator’s Manual
Rear Panel onnections
Power Switch: turns the unit’s mains supply off and on.
Mains Fuse: located in a finger-proof holder adjacent to the mains inlet. A spare fuse
is also located in this holder.
Mains Inlet: connected via a standard IEC socket.
RS232: RS232 standard via a 9 pin D-type connector, for connection to a PC. Data is
converted to RS485 standard and relayed to slave units via the RS485 sockets.
RS485 In-Out: XLR sockets. Used for transmission of remote control data over long
distance or multiple unit applications. See page 28 for more information.
For more details on interfaces see our Interface Guide, available from the website.
Audio Outputs: 3 pin XLR sockets are provided for each channel. All are fully balanced, pin 2 hot, 3 cold, 1 screen.
Note the legending on the panel to designate which outputs are used for AES streams when the digital outputs are
enabled. Please see page 31 for more information.
AES Input Switch: Recessed switch to select AES digital
inputs. Red LED will illuminate in the hole when AES inputs
are selected, along with the corresponding front panel
indicator.
Audio Inputs: 3 pin XLR sockets are provided for each
channel. All are fully balanced, pin 2 hot, 3 cold, 1 screen.
Note the legending on the panel to designate which inputs
are used for AES when the digital inputs are enabled. Please
see page 31 for more information.
Always replace the fuse with the correct type and rating as shown on the rear panel legend.

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Operators Manual Page 11
Operating the 4 Series
4 Series4 Series
4 Series
Note about operation with AudioCore software.
The following operating information covers setup and control of the 4 Series via the front panel controls only. Please
consult the manual supplied with this software for information regarding full computer control.
Start-up procedure
Switching on the unit will display a brief message detailing the unit type and software version running
== A dioCore DP4XX ==
== A dioCore DP4XX ==== A dioCore DP4XX ==
== A dioCore DP4XX ==
==Software V 1.00 ==
==Software V 1.00 ====Software V 1.00 ==
==Software V 1.00 ==
and all LEDs will briefly illuminate. The unit will then begin its countdown to the wake-up procedure
2
, during which time
the audio will fade up to the level last set. Metering will begin to operate when the fade-up starts.
Preliminary Set-up
The procedure below should be followed when first installing a 4 Series nit
4 Series nit4 Series nit
4 Series nit.
 Design your crossover! To do this, press MENU, and use the BACK or NEXT key to select ‘Crossover
Crossover Crossover
Crossover
s b
s bs b
s b-
--
-men
menmen
men ’ and then press ENTER. Use the BACK or NEXT key to select ‘Design a crossover
Design a crossoverDesign a crossover
Design a crossover’
and then press ENTER. Finally, use the BACK or NEXT key to select the desired routing
3
and follow the set-up
wizard to finalise your design.
 Note that when in a menu, ENTER is always used to confirm selections. The current selection is marked with an
asterisk ‘*’.
 Use the EDIT keys on each output channel with the BACK and NEXT keys to select the high pass filters, low
pass filters, parametrics etc. Note that when designing a new crossover, the high and low pass filters will be set
to default values.
 Use the EDIT keys on each input channel with the BACK and NEXT keys to select the gain, delay and
parametrics available on each input.
Note that if no action is taken in menu mode, the unit will return to normal ‘default’ mode after about twenty
(20) seconds. Repeat the above directions to return to menu mode.
2
The wake-up time countdown may be adjusted in the SYSTEM menu – see page 23 for details.
3
For details about adjusting the routing if one of the standard configurations does not suit, see page 15.

Page 12 4 Series
4 Series 4 Series
4 Series Operator’s Manual
Routing Options and Processing Blocks
Due to the completely new DSP platform, the routing possibilities within the 4 Series have been made completely
flexible, with a matrix available allowing any combination of inputs to be routed to any output. The additional DSP power
has permitted the inclusion of more processing blocks, even considering the extra inputs and outputs, and the doubling of
sample rate.
To reduce set-up time and aid usability, several standard configurations are available as described in a later section.
This section will outline the processing blocks available in relation to the signal path, and explain the various options for
routing, including the “Free Assign” mode, which opens up completely flexible channel routing.
Input Channel Makeup
The diagram below shows the processing available on each of the four input channels, before routing to the matrix.
Output Channel Makeup
The diagram below shows the processing available on each of the eight output channels, after routing from the matrix.
Preset Routing Configurations ( DP448 shown)
In addition to the ability to assign any combination of inputs to any output, a number of preset configurations are provided,
for use when designing a crossover from scratch. These have the advantage of suggested settings for the high and low pass
filters to useful basic starting points, to filter the different outputs as appropriate for the chosen configuration. These may,
of course, be freely modified afterwards should they not suit the re uirements exactly.
The diagrams on the following pages show the connections made between inputs and outputs, and the suggested values
chosen for the high and low pass filters.

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Operators Manual Page 13
4 x 2 way crossover: As shown, each input feeds a pair of outputs, odd numbers being the low fre uency split, and even
numbers being the high part of the spectrum. Default suggested crossover fre uencies are shown by each output.
2 x 3 way crossover: Inputs A and B feed three outputs each, with output 7 being fed from input C, and output 8 from
input D. Note the ‘Aux’ outputs are set to full range. Default suggested crossover fre uencies are shown by each output.

Page 14 4 Series
4 Series 4 Series
4 Series Operator’s Manual
2 x 4 way crossover: Inputs A and B feed four outputs each, with inputs C & D being unused. Default suggested crossover
fre uencies are shown by each output.
1 x 8 way crossover: Inputs A is fed to all eight outputs, with initial settings being all full bandwidth. The crossover points
can be adjusted as desired.

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Operators Manual Page 15
Free Assign Routing
If none of the preset configurations are appropriate to the re uired system setup, it is possible to manually select the
routing of the crossover. This is achieved through the Crossover Men
Crossover Men Crossover Men
Crossover Men -
--
-> Design A Crossover
> Design A Crossover> Design A Crossover
> Design A Crossover.
Pressing ENTER will start the crossover design wizard, with the first option being to choose the routing.
The display will show
Design
Design Design
Design A Crossover
A Crossover A Crossover
A Crossover -
--
->
>>
>
Ro ting = 2 X 4 WAY *
Ro ting = 2 X 4 WAY *Ro ting = 2 X 4 WAY *
Ro ting = 2 X 4 WAY *
or whatever the current configuration is set to. Press BACK until the display shows
Design A Crossover
Design A Crossover Design A Crossover
Design A Crossover -
--
->
>>
>
Ro ting = Free Assign
Ro ting = Free AssignRo ting = Free Assign
Ro ting = Free Assign
And then press ENTER. The EDIT key will illuminate for output 1, as will any relevant input EDIT keys, showing which
inputs are feeding output 1. The display will also detail the current combination of inputs feeding this output. To change
the routing for any output, press its EDIT key, and then choose the re uired input channel combination by just pressing
the input EDIT keys as appropriate. The input combinations can also be stepped through in turn by pressing NEXT, or
BACK.
To complete the procedure, press ENTER. The wizard will continue, and if the routing has been changed, all outputs will
be muted on exit.

Page 16 4 Series
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4 Series Operator’s Manual
Editing Audio Parameters – Input hannels
Input Gain
The range of the control over the input gain is –40dB to +6dB in 0.1dB steps.
InA Inp t A Gain
InA Inp t A GainInA Inp t A Gain
InA Inp t A Gain
Inp t Gain =
Inp t Gain = Inp t Gain =
Inp t Gain = +6.0dB
+6.0dB+6.0dB
+6.0dB
Gain
Base Delay
The maximum available delay between any input and output is 650.00mS. For example, if the input delay on channel A is
set to 500mS, the maximum available output delay for any output fed from input A will be 150mS. The readout units can
be changed between time in milliseconds, distance in feet or distance in metres. Please see page 23 for more details.
InA Inp t A Delay
InA Inp t A DelayInA Inp t A Delay
InA Inp t A Delay
Base
Base Base
Base Delay = 0.00mS
Delay = 0.00mSDelay = 0.00mS
Delay = 0.00mS
x 1mS x 10 S
343mm 4mm
Input Graphic EQ
The graphic e ualiser has 28 third octave bands from 31Hz to 16kHz, and a gain range of +12dB. The G6
G6G6
G6 on the second
line of the screen denotes the ‘Q’ behaviour of the graphic – this setting behaves like a GQ600 with variable ‘Q’ that is
‘gentler’ at low cut/boost values and sharpens at high cut/boost values. The alternate setting, Sp
SpSp
Sp, is a constant ‘Q’
behaviour where no change in bandwidth occurs with differing cut/boost. Pressing BYPASS
BYPASSBYPASS
BYPASS will bypass the entire
Graphic EQ on this channel. For details of how to select the behaviour, please see page 23.
InA Inp t A Graph<>
InA Inp t A Graph<>InA Inp t A Graph<>
InA Inp t A Graph<>
40Hz +
40Hz +40Hz +
40Hz +-----
----------
----- G6 0.0dB
G6 0.0dB G6 0.0dB
G6 0.0dB
Freq ency Gain
Input Parametric EQ
There are eight bands of parameter e ualisation available on every input. The behaviour of each individual band can be
changed to a variety of different filter shapes, including high and low shelves, notch, and bandpass. Changing the filter type
is achieved by pressing ENTER
ENTER ENTER
ENTER during editing any particular band. For more details about the various types of filter
available, please see page 42.
InA Inp t A PEQ:1<>
InA Inp t A PEQ:1<>InA Inp t A PEQ:1<>
InA Inp t A PEQ:1<>
1k00Hz Q=3.0 0.0dB
1k00Hz Q=3.0 0.0dB1k00Hz Q=3.0 0.0dB
1k00Hz Q=3.0 0.0dB
Freq ency ‘Q’ Gain

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Operators Manual Page 17
Editing Audio Parameters – Output hannels
Output Gain
The range of the control over the input gain is –40dB to +15dB in 0.1dB steps.
OP1 O tp t 1 Gain
OP1 O tp t 1 GainOP1 O tp t 1 Gain
OP1 O tp t 1 Gain
O tp t Gain = +6.0dB
O tp t Gain = +6.0dBO tp t Gain = +6.0dB
O tp t Gain = +6.0dB
Gain
Output Polarity
The polarity (or phase) of each output may be switched individually as below.
OP1 O tp t 1 Polar.
OP1 O tp t 1 Polar.OP1 O tp t 1 Polar.
OP1 O tp t 1 Polar.
Polarity = [+]
Polarity = [+]Polarity = [+]
Polarity = [+]
- or +
Output Delay
The maximum available delay between any input and output is 650.00mS. For example, if the input delay on channel A is
set to 500mS, the maximum available output delay for any output fed from input A will be 150mS. The readout units can
be changed between time in milliseconds, distance in feet or distance in metres. Please see page 23 for more details.
OP1 O tp t 1 Delay
OP1 O tp t 1 DelayOP1 O tp t 1 Delay
OP1 O tp t 1 Delay
Delay = 0.0000mS
Delay = 0.0000mSDelay = 0.0000mS
Delay = 0.0000mS
x 1mS x 10 S x0.3 S
343mm 4mm 0.1mm

Page 18 4 Series
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4 Series Operator’s Manual
Output High Pass Filter
The high pass crossover filter on each output has a fre uency range of <10Hz up to 32kHz in 1/36
th
Octave steps. If you
try to set the high pass filter to a higher fre uency than the low pass (which would be pointless and result in no output),
the message High/Low Freq. Overlap!
High/Low Freq. Overlap!High/Low Freq. Overlap!
High/Low Freq. Overlap! will be displayed. Note that to access the 48dB/Octave filters,
parametric bands 6 & 7 need to be bypassed, or set to 0dB. If they are not, the message Bypass PEQ’s 6 & 7
Bypass PEQ’s 6 & 7 Bypass PEQ’s 6 & 7
Bypass PEQ’s 6 & 7
To Access 48dB Slopes
To Access 48dB SlopesTo Access 48dB Slopes
To Access 48dB Slopes will be displayed.
OP1 O tp t 1 HPF /~~
OP1 O tp t 1 HPF /~~OP1 O tp t 1 HPF /~~
OP1 O tp t 1 HPF /~~
<10Hz Linkw
<10Hz Linkw<10Hz Linkw
<10Hz Linkw-
--
-Riley 48dB
Riley 48dBRiley 48dB
Riley 48dB
Freq ency Slope
Output Low Pass Filter
The low pass crossover filter on each output has a fre uency range of 35.1Hz up to >32kHz in 1/36
th
Octave steps. If you
try to set the low pass filter to a lower fre uency than the high pass (which would be pointless and result in no output), the
message High/Low Freq. Overlap!
High/Low Freq. Overlap!High/Low Freq. Overlap!
High/Low Freq. Overlap! will be displayed. Note that to access the 48dB/Octave filters, parametric
bands 8 & 9 need to be bypassed, or set to 0dB. If they are not, the message Bypass PEQ’s 8 & 9 To
Bypass PEQ’s 8 & 9 To Bypass PEQ’s 8 & 9 To
Bypass PEQ’s 8 & 9 To
Access 48dB Slopes
Access 48dB SlopesAccess 48dB Slopes
Access 48dB Slopes will be displayed.
OP1 O tp t 1 LPF ~~
OP1 O tp t 1 LPF ~~OP1 O tp t 1 LPF ~~
OP1 O tp t 1 LPF ~~\
\\
\
>32kHz Linkw
>32kHz Linkw>32kHz Linkw
>32kHz Linkw-
--
-Riley 48dB
Riley 48dBRiley 48dB
Riley 48dB
Freq ency Slope
Output Parametric EQ
There are nine bands of parametric e ualisation available on every output
4
. The behaviour of each individual band can be
changed to a variety of different filter shapes, including high and low shelves, notch, and bandpass. Changing the filter type
is achieved by pressing B
BB
BYPASS
YPASSYPASS
YPASS to bypass the filter and then pressing ENTER
ENTER ENTER
ENTER during editing any particular band. For
more details about the various types of filter available, please see page 42.
OP1 O tp t 1 PEQ:1<>
OP1 O tp t 1 PEQ:1<>OP1 O tp t 1 PEQ:1<>
OP1 O tp t 1 PEQ:1<>
1k00Hz Q=3.0 0.0dB
1k00Hz Q=3.0 0.0dB1k00Hz Q=3.0 0.0dB
1k00Hz Q=3.0 0.0dB
Freq ency ‘Q’ Gain
4
Note that 2 bands each will be lost when using 48dB slope crossover filters, resulting in a maximum of 5 bands of EQ
when both high and low pass are set to 48dB/Octave.

      
            
      
Operators Manual Page 19
Output Limiter
The limiter on each output has adjustable attack and threshold, with a release time that is selectable to be a multiplier of
the attack time. For example, as shown below, the attack time is 2mS and release is “x16” so 32mS. The attack and
release times can be automatically linked to the high pass filter fre uency, so that they are set to correct values for the
output’s fre uency range. If this feature is enabled, the display will show A tomatic T/C
A tomatic T/CA tomatic T/C
A tomatic T/C in place of the attack and
release times. Selection of automatic time constants is through the Design a Crossover
Design a Crossover Design a Crossover
Design a Crossover wizard, in the
Crossover S b
Crossover S bCrossover S b
Crossover S b-
--
-Men
MenMen
Men .
OP1 O tp t 1 Limiter
OP1 O tp t 1 LimiterOP1 O tp t 1 Limiter
OP1 O tp t 1 Limiter
Atk=2.0mS Rel=x16 +22dB
Atk=2.0mS Rel=x16 +22dBAtk=2.0mS Rel=x16 +22dB
Atk=2.0mS Rel=x16 +22dB
Attack Release Threshold
Output “D-Max” (Clip) Limiter
The clip limiter on each output is designed to sit at a threshold just above the standard limiter and has a look ahead attack
so that its threshold can never be exceeded. The release time can be automatically linked to the high pass filter fre uency,
so that it is set to a value appropriate for the output’s fre uency range. If this feature is enabled, the display will show
Rel. = A to
Rel. = A toRel. = A to
Rel. = A to in place of the release time. Selection of automatic time constants is through the
Design a Crossover
Design a CrossoverDesign a Crossover
Design a Crossover wizard, in the Crossover S b
Crossover S bCrossover S b
Crossover S b-
--
-Men
MenMen
Men .
More information about the limiters and their use is given in the section on page 39.
OP1 O tp t 1 ClipLim
OP1 O tp t 1 ClipLimOP1 O tp t 1 ClipLim
OP1 O tp t 1 ClipLim
Rel.=Med
Rel.=MedRel.=Med
Rel.=Medi m 2dB Above
i m 2dB Abovei m 2dB Above
i m 2dB Above
Release Threshold

Page 20 4 Series
4 Series 4 Series
4 Series Operator’s Manual
Input Ganging and Output Ganging
The method of linking inputs or outputs together during editing is achieved in the same way, so only crossover (output)
ganging will be explained here. Having selected Crossover Ganging
Crossover Ganging Crossover Ganging
Crossover Ganging from the menu under the Crossover
Crossover Crossover
Crossover
S b
S bS b
S b-
--
-Men
MenMen
Men , the current ganging set-up will be displayed. This will either be a preset selection as would be useful in a
standard crossover configuration – for example
<
<<
<-
--
-Crossover Ganging
Crossover GangingCrossover Ganging
Crossover Ganging
Ganging=1+3+5+7 2+4+6+8
Ganging=1+3+5+7 2+4+6+8Ganging=1+3+5+7 2+4+6+8
Ganging=1+3+5+7 2+4+6+8
…would be a logical ganging arrangement if the crossover was set up as a 4 x 2 way – linking the control and adjustment of
all “Low” outputs together, and that of all “High” outputs together.
However, if the crossover has not been set up with a preset routing configuration, then it may be re uired to set up the
ganging to compliment this configuration. This is achieved using the Free Assign
Free AssignFree Assign
Free Assign mode. This is selected from the
preset ganging choices
5
, which are:
Ganging=None
Ganging=NoneGanging=None
Ganging=None [all outputs independent]
Ganging=Free Assign
Ganging=Free AssignGanging=Free Assign
Ganging=Free Assign [choose ganging]
Ganging=1+2+3+4+5+6+7+8
Ganging=1+2+3+4+5+6+7+8Ganging=1+2+3+4+5+6+7+8
Ganging=1+2+3+4+5+6+7+8 [1 x 8 way]
Ganging=1+5 2+6 3+7 4+8
Ganging=1+5 2+6 3+7 4+8Ganging=1+5 2+6 3+7 4+8
Ganging=1+5 2+6 3+7 4+8 [4 x 2 way]
Ganging=1+3+5+7 2+4+6+8
Ganging=1+3+5+7 2+4+6+8Ganging=1+3+5+7 2+4+6+8
Ganging=1+3+5+7 2+4+6+8 [2 x 4 way]
Selecting Free Assign
Free Assign Free Assign
Free Assign and then pressing ENTER will begin the process of ganging outputs together using the
following simple rules:
 All outputs are ganged to the lowest number – so to gang 3 & 5, 5 must be selected and then ganged to 3.
 Outputs cannot share more than one ganging set – so for example output 3 cannot be ganged to 2 and 4 unless
they are ganged together as well. (Effectively 3 and 4 are ganged to 2 in this case)
With these rules in mind, selecting and setting up gangs is uite straightforward.
Press a MUTE key to choose the output to gang – its LED will begin to flash, and an EDIT key will illuminate to show
which output it is currently ganged with. To change this selection, just press another EDIT key, remembering that gangs
work from the highest to lowest number. So, to gang outputs 1 and 5, press MUTE 5 then EDIT 1 – the display will show
<
<<
<-
--
-Crossover Ganging
Crossover GangingCrossover Ganging
Crossover Ganging
Gang O tp t 5 with 1
Gang O tp t 5 with 1Gang O tp t 5 with 1
Gang O tp t 5 with 1
Ganging is cleared by selecting Ganging=None
Ganging=None Ganging=None
Ganging=None from the initial choices given above. The Inp t Ganging
Inp t Ganging Inp t Ganging
Inp t Ganging
procedure is identical to the crossover ganging, selectable under the Inp t S b
Inp t S b Inp t S b
Inp t S b-
--
-Men
MenMen
Men .
5 Ganging choices will be dependent on the 4 Series
4 Series4 Series
4 Series unit in question and how many outputs it has.