Martin Audio DX1.5 User manual

All material © 2009. Martin Audio Ltd. Subject to change without notice.
Contents
1) Important Safety Information
2) Electrical compliance
3) Unpacking the unit
4) Introduction
5) Features
6) DX1.5 Quick Reference
7) Loading factory presets into your Martin Audio
DX1.5 Loudspeaker Management System
8) Selecting a specific preset
9) Amplifier power, amplifier gain, DX1.5 primary limiter
and ClipLim settings
10) Front Panel functions (l-r)
11) Rear Panel functions (l-r)
12) Operating your DX1.5
13) Routing Options and Processing Blocks
14) Editing Audio Parameters – Input Channels
15) Editing Audio Parameters – Output Channels
16) Input Ganging and Output Ganging
17) Memory Structure
18) Loading new software via a pc
19) AES Inputs
20) Warranty

All material © 2009. Martin Audio Ltd. Subject to change without notice.
! READ THIS FIRST !
1) Important Safety Information
This equipment must be earthed.
Do not expose to rain, moisture or excessive dust
No user serviceable parts inside, refer servicing to qualified service personnel.
Do not remove covers
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN !
Objects containing liquids, such as vases, must not be placed on this equipment.
Do not remove any protective earth or signal cable shield connections.
Only use this equipment with an appropriate mains cord.
In the USA the cord should comply with the requirements contained in the Standard for Cord
Sets and Power Supply Cords, UL 817, be marked VW-1, and have a current carrying
capacity not less than the marked rating of the apparatus.
2) Electrical compliance
An example of this equipment 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)
Country of origin: United Kingdom
3) 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
you need to return the unit.
Please think of our environment.
When the product has reached the end of its useful life, please dispose of it
responsibly through a recycling centre.

All material © 2009. Martin Audio Ltd. Subject to change without notice.
4) Introduction
The DX1.5 is a powerful DSP based audio processor, ideally suited for install applications,
where they combine the functions of a multitude of conventional products in a compact 1U
unit. To achieve this, the unit’s have inputs and outputs which can be configured in a
selection of basic crossover modes. The DX1.5 also offers a “free assign” mode, which
allows completely flexible routing of any output from any combination of the inputs.
Each input has a gain control, variable delay and a further eight bands of fully parametric
equalisation. The parametric filter bands have a large selection of different filter types
available, including shelving.
Each output has a gain control, variable delay, high and low pass crossover filters, nine bands
of fully parametric equalisation, 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.
Security lock-out is available for all controls.
The DX1.5 is also equipped with AES/EBU digital inputs, and includes a sample rate
converter, capable of accepting anything from 32kHz up to 192kHz.
5) Features
Superb audio quality – 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 SHARCTM -based DSP platform supplies phenomenal computational power,
allowing the unit to provide not only multiple bands of standard parametric equalisation on
every input and output, but an additional full spectrum graphic equaliser 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.

All material © 2009. Martin Audio Ltd. Subject to change without notice.
6) DX1.5 Quick Reference
Editing channels
Press channel’s EDIT key. First press accesses that channel’s gain. To scroll through
channel’s parameters, use the BACK and NEXT keys. The 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 required, and
enter the sub-menu using the ENTER key. This applies to all levels of menu. ENTER always
confirms selections.
The displayed menus and their contents
GLOBAL MEMORY Sub-menu Recall/Store/Erase input, crossover or combination
settings.
INPUT SECTION Sub-menu Set up input ganging,
CROSSOVER Sub-menu Set up or adjust crossover design, including routing
and auto limiter setting. Also set up output ganging.
INTERFACE Sub-menu Communications interface setup.
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 Sub-menu Used for locking various operations of the unit, using
a 4 digit code.
Notes
Crossover & input settings may be stored independently via the Global 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 Sub-menu, select
Filter Q / Bandwidth, and select required readout units.
To swap delay time units, enter System Sub-menu, select Delay Time / Distance, and select required
readout units.
If you press an EDIT key the corresponding channels routed to / from that channel will flash.

All material © 2009. Martin Audio Ltd. Subject to change without notice.
7) Loading factory presets into your Martin Audio 2in/6out
DX1.5 Loudspeaker Management System
A zip folder containing loader software and current DX1.5 binary files is available from the
accompanying User Guides CD and from www.martin-audio.com. Extract the contents to your
hard disk. Do not run the programme from the zip folder.
Warnings
Loading presets will overwrite previously loaded factory presets - and any changes to them
(e.g. channel gain, delay, primary limiter and ClipLim settings).
To make a permanent record of changes to the user-editable parts of a preset, you must save
the preset in one of the lower number memory locations.
Make sure you have a full set of .bin files before proceeding so that you can reload your
original presets if you need to.
If you are not familiar with the Martin Audio DX1.5, please read the DX1.5 User Guide.
You should have extracted the following files to a suitable folder on your hard drive:
MartinFlashLoader.exe – The binary preset loader software
General presets
MARTN15RLib5.bin – The general family of binary presets for most regular Martin Audio
loudspeakers and stage monitors. Line array systems have separate preset families - see
below…
Line array presets
Note that we recommend the 4in/8out remote controllable DX2 for more complex systems
(e.g. band-zoned Longbow + W8LD + W8LS).
MARTN15RLB02.bin – Binary presets for W8L Longbow
MARTN15RLCDLC3.bin – Binary presets for W8LC + W8LCD
MARTN15RLM21802.bin – Binary preset for W8LM/LMD + WS218X/W8LS
MARTN15RLMLX01.bin – Binary preset for W8LM/LMD + WLX
MARTN15RLMMX03.bin – Binary presets for W8LM/LMD+WMX
(Note that preset libraries may have been updated since this user guide was published.
Updated presets may show slight title variations)

All material © 2009. Martin Audio Ltd. Subject to change without notice.
You will need a 9 pin male-to-female, fully wired, pin-to-pin RS232 cable
Note: this lead should be pin-to-pin – not the null modem type.
To load the latest presets into your DX1.5
1. Connect the 9-pin male to 9-pin female DEE type serial lead from your computer to the
external socket on the rear of the unit.
2. On the DX1.5 use the blue Menu, Back, Next and Enter keys to go into the Interface Sub-
menu and then into External Interface.
3. Once entered, setup as follows:
Serial Speed: 38400
Press Enter to confirm
4. Run the programme MartinFlashLoader.exe.
5. Set the Serial Port Speed to 38400.
The bottom right hand window should indicate Good Response.
If the Serial Speed number is not set to 38400 to match the DX1.5 speed, the software lower
right window may indicate No Response.

All material © 2009. Martin Audio Ltd. Subject to change without notice.
Make sure that the Serial port Speed on your pc screen is set to 38400 to match the DX1.5.
If that fails to fix the problem, try adjusting the Com (Serial Port) number and clicking the
Connect button again. It is usually quicker to do this by trial and error as Com port numbering
can be a mystery to the average PC user!
6. Click on the File to Load button (circled)
7. Click on the Load New Preset File button (circled)
8. Browse to find the files you extracted earlier.
Click on the preset required (to highlight it) and click Open.

All material © 2009. Martin Audio Ltd. Subject to change without notice.
9. Click Load Now (circled)
10. The programme will communicate with the DX1.5 and ask for confirmation.
Click OK.
You’ll see the green block writing progress bar proceeding from left to right
and
on the DX1.5 front panel you’ll see graphics shuffling from right to left…followed by an
indicator test (all LEDs on)…and a short delay…and then a wake-up procedure.

All material © 2009. Martin Audio Ltd. Subject to change without notice.
8) Selecting a specific preset
Each binary file will load a family of presets into your DX1.5.
Please note that the DX1.5 will retain its current preset until instructed to change to
one of the newly loaded ones.
Change the DX1.5’s settings to one of the newly loaded presets as
follows:
Press the blue Menu button, then the Back and Next buttons to find the Global Memory Sub
Menu and press Enter.
Use the Back and Next buttons to find the Recall a Memory and press Enter.
Use the Back and Next buttons to find the Crossover only and press Enter.
Browse for the appropriate preset using the Back and Next buttons or the Frequency knob.
Note that the DX1.5 will default to its previous condition if the above operations are not
completed and no buttons are pressed for 20 – 30 seconds.
Input parameters
Input parameters are not usually specified within standard Martin Audio presets – hence the
Crossover only selection above.
When configuring a new system always ensure that there are no input gain, base delay or
input eq settings left on the input sections by previous users.
Press the input EDIT buttons and scroll through the parameters for that input using the blue
Back and Next buttons. See section 14) Editing Audio Parameters – Input Channels for
operating details…
9) Amplifier power, amplifier gain, DX1.5 primary limiter
and ClipLim settings
Amplifier power
We suggest you specify an amplifier capable of meeting the loudspeaker’s peak power rating
– as long as you use the correct Martin Audio limiter recommendations.
Primary limiters
The primary Limiter parameters protect the loudspeaker from rms heating effects whilst the
correct amplifier power specification and ClipLim settings protect the loudspeaker from
transient overloads and clipping.
Primary Limiter thresholds are factory preset for new products and recommended in the user
guide CD controller spreadsheets for older products. Factory preset primary Limiters are set
for power amplifiers with the pro-audio voltage gain* standard of 32dB (x40). Spreadsheet
recommendations for older products show a range of primary Limiter settings depending on
your chosen amplifier gain/sensitivity.
* We recommend using power amplifier voltage with known gain settings if at all possible.
Manufacturers’ sensitivity settings are not very useful as the resulting gain figures will vary
from model to model depending on their power specifications causing spectral imbalance
when using mixed amplifier set-ups.
If you have to use a power amplifier set to a different gain standard, make absolutely sure that
you adjust the 32dB standard factory preset or spreadsheet recommendation as follows:

All material © 2009. Martin Audio Ltd. Subject to change without notice.
Power amplifier gain Primary limiter threshold adjustment from 32dB
preset standard
23dB Add 9dB (e.g. +4dBu becomes +13dBu)
24dB Add 8dB
25dB Add 7dB
26dB (Crown standard) Add 6dB (e.g. +4dBu becomes +10dBu)
27dB Add 5dB
28dB Add 4dB
29dB Add 3dB
30dB Add 2dB
31dB Add 1dB (e.g. +4dBu becomes +5dBu)
32dB (Industry standard) Martin Audio preset standard
33dB Decrease by 1dB (e.g. +4dBu becomes +3dBu)
34dB Decrease by 2dB
35dB Decrease by 3dB
36dB Decrease by 4dB (e.g. +4dBu becomes 0dBu)
37dB Decrease by 5dB
38dB Decrease by 6dB
39dB Decrease by 7dB
40dB Decrease by 8dB (e.g. +4dBu becomes -4dBu)
ClipLims
The ClipLim settings protect the loudspeaker from transient overloads (and protects against
amplifier clipping if the amplifier is capable of supplying the loudspeaker’s rated peak power).
All Martin Audio loudspeakers are designed to professional AES power ratings that allow for
6dB signal peaks above the rated AES power. This means that Martin Audio loudspeakers
have peak power handling capabilities that are 6dB above (4x) their AES power ratings –
when the correct controller settings are used.
Note that the ClipLims default to Medium 2dB Above the primary limiter thresholds if not set
up. To take advantage of your power amplifier’s and loudspeaker’s peak capability, set the
ClipLims as follows:
Subwoofers Slow 6dB Above
Low mid/LF Medium 6dB Above
High mid/HF Fast 6dB Above
If you have specified an amplifier smaller than the loudspeaker’s peak power rating you may
need to reduce the ClipLim settings by a dB or two to prevent amplifier clipping as it runs out
of headroom.
You must, of course, set the recommended primary Limiter threshold before adjusting the
ClipLim level to prevent amplifier clipping.
If you end up setting the ClipLim as low as 2dB Above in an attempt to prevent significant
amplifier clipping, and the amplifier still clips, you probably need a bigger amplifier. If budgets
don’t allow for a bigger amplifier you may need to reduce the primary Limiter threshold
settings to prevent the amplifier from clipping at the 2dB Above ClipLim setting.
System configurations
Your Martin Audio DX1.5 Loudspeaker Management System must be correctly patched.
There are a large number of Martin Audio factory presets and configurations and these are
being expanded all the time. It is always sensible to check your DX1.5 output channel
allocations for the particular preset you have chosen to use before patching your system. This
will ensure that the appropriate band is being routed to each loudspeaker section.
You can do this by pressing each yellow output channel EDIT button and noting the output
channel allocations (e.g. Low, MidHi) indicated on the DX1.5’s display panel.

All material © 2009. Martin Audio Ltd. Subject to change without notice.
10) Front Panel functions (l-r)
LCD Screen
By default, the screen shows the current routing configuration on the top line and the name of
the last recalled memory on the bottom line. All other parameters and menus are shown as
they are edited.
Control Keys – Parameter selection and adjustment
NEXT key - moves forward through list of parameters.
BACK key - moves back 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.
Different menus are selected 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. 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.
FREQ, Q& GAIN (velocity sensitive encoders) adjust the relevant parameters as displayed
on the screen.
The two status LEDs indicate that AES inputs have been selected and Error.
Inputs A & B - meters show dB from clipping point of the analogue to digital converters.

All material © 2009. Martin Audio Ltd. Subject to change without notice.
MUTE buttons illuminate when pressed and mute audio for that input channel.
EDIT buttons illuminate yellow when pressed. The buttons access gain on first press, last
viewed parameter on second press, then exit on third press.
Outputs 1-6 - meters show dB below limit (Green), Limit (yellow) and Limit + 4dB (Red).
MUTE buttons illuminate when pressed and mute audio for that output channel.
EDIT buttons illuminate yellow when pressed. The buttons access gain on first press, last
viewed parameter on second press, then exit on third press.
11) Rear Panel functions (l-r)
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 inside this holder)
Important - Always replace the fuse with the correct type and rating as shown on the rear panel legend.
Mains Inlet - connected via a standard IEC socket.
External - 9 pin D-type connector for preset loading via RS232 PC link. See later for DX1.5
preset loading instructions.
Outputs 1 - 6 – a 3 pin XLR socket is provided for each output. All are fully balanced, pin 2
hot, 3 cold, 1 screen.
Recessed AES input 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.
Inputs A & B – a 3 pin XLR socket is provided for each input.
Both are fully balanced – pin 1 = screen, pin 2 = hot, pin 3 = cold. Input A is also used as a 2-
ch AES digital audio input when AES mode is selected.
12) Operating your DX1.5
Start-up procedure
Switching on the unit will display a brief message detailing the unit type and software version
running and all LEDs will briefly illuminate. The unit will then begin its countdown to the
wake-up procedure, 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 DX1.5 unit.
Design your crossover! To do this, press MENU, and use the BACK or NEXT key to select
‘Crossover sub-menu’ and then press ENTER. Use the BACK or NEXT key to select
‘Design a crossover’ and then press ENTER. Finally, use the BACK or NEXT key to select
the desired routing 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 ‘*’.

All material © 2009. Martin Audio Ltd. Subject to change without notice.
Use the EDIT keys on each output channel with the BACK and NEXT keys to select the high
pass filters, low pass filters, parametric equalisers 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 parametric equalisers 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 seconds. Repeat the above directions to return to menu mode.
13) Routing Options and Processing Blocks
Due to the completely new DSP platform, the routing possibilities within the DX1.5 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.
The diagrams below show the processing available on inputs and outputs – ignoring matrix
routing.
Input Channel Makeup
Output Channel Makeup
Preset Routing Configurations
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 be freely modified afterwards should they not suit the requirements exactly.

All material © 2009. Martin Audio Ltd. Subject to change without notice.
Free Assign Routing
If none of the preset configurations are appropriate to the required system setup, it is possible
to manually select the routing of the crossover. This is achieved through the Crossover
Menu > Design a Crossover.
Pressing ENTER will start the crossover design wizard, with the first option being to choose
the routing.
The display will show, for instance
Design a Crossover ->
Routing = 2 X 3 WAY
or whatever the current configuration is set to. Press BACK until the display shows
Design a Crossover ->
Routing = 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 required 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 screen will show:
Design a Crossover ->
Clear Settings : No *
Press ENTER again.
The wizard will continue, and if the routing has been changed, all outputs will be muted on
exit.

All material © 2009. Martin Audio Ltd. Subject to change without notice.
14) Editing Audio Parameters – Input Channels
Input Gain
The range of the control over the input gain is –40dB to +6dB in 0.1dB steps.
Gain
The display will show, for instance
InA Input A Gain
Input Gain = +6.0dB
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.
x 1mS x 0.01mS
The display will show, for instance
InA Input A Delay
Base Delay = 0.00mS
Input Parametric EQ
There are eight bands of parameter equalisation 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 band-pass. Changing the filter type is achieved by pressing ENTER
during editing any particular band.
Frequency Q Gain
The display will show, for instance
InA Input A PEQ:1<>
1k00Hz Q=3.0 0.0dB

All material © 2009. Martin Audio Ltd. Subject to change without notice.
15) Editing Audio Parameters – Output Channels
Output Gain
The range of the control over the input gain is –40dB to +15dB in 0.1dB steps.
Gain
The display will show, for instance
OP1 Output 1 Gain
Output Gain = +6.0dB
Output Polarity
The polarity (or phase) of each output may be switched individually as below.
-or +
The display will show, for instance
OP1 Output 1 Polar.
Polarity = [+]
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.
x 1mS x 10uS x0.3uS
The display will show, for instance
OP1 Output 1 Delay
Delay = 0.0000mS
Output High Pass Filter
The high pass crossover filter on each output has a frequency range of <10Hz up to 32kHz in
1/36th Octave steps.
If you try to set the high pass filter to a higher frequency than the low pass (which would be
pointless and result in no output), the message 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.

All material © 2009. Martin Audio Ltd. Subject to change without notice.
If they are not, the message
Bypass PEQ’s 6 & 7 To Access 48dB Slopes
will be displayed.
Freq Slope
The display will show, for instance
OP1 Output 1 HPF /~~
<10Hz Linkw-Riley 48dB
Output Low Pass Filter
The low pass crossover filter on each output has a frequency range of 35.1Hz up to >32kHz
in 1/36th Octave steps.
If you try to set the low pass filter to a lower frequency than the high pass (which would be
pointless and result in no output), the message 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 Access 48dB Slopes
will be displayed.
Freq Slope
The display will show, for instance
OP1 Output 1 LPF ~~\
>32kHz Linkw-Riley 48dB
(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)
Output Parametric EQ
There are nine bands of parametric equalisation available on every output. The behaviour of
each individual band can be changed to a variety of different filter shapes, including high and
low shelves, notch, and band-pass.
Changing the filter type is achieved by pressing BYPASS to bypass the filter and then
pressing ENTER during editing any particular band.
Freq Q Gain

All material © 2009. Martin Audio Ltd. Subject to change without notice.
The display will show, for instance
OP1 Output 1 PEQ:1<>
1k00Hz Q=3.0 0.0dB
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 frequency, so
that they are set to correct values for the output’s frequency range. If this feature is enabled,
the display will show Automatic T/C in place of the attack and release times.
Selection of automatic time constants is through the Design a Crossover wizard, in the
Crossover Sub-Menu.
Attack Release Threshold
The display will show, for instance
OP1 Output 1 Limiter
Atk=2.0mS Rel=x16 +22dB
Output “D-Max” (ClipLim)
The clip limiter 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 frequency. If this feature is enabled, the display will
show Rel. = Auto in place of the release time. Selection of automatic time constants is
through the Design a Crossover wizard, in the Crossover Sub-Menu.
Release Threshold
The display will show, for instance
OP1 Output 1 ClipLim
Rel.=Medium 6dB Above
16) 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 from the menu under the Crossover Sub-Menu, the current ganging set-up will be
displayed.

All material © 2009. Martin Audio Ltd. Subject to change without notice.
This will either be a preset selection as would be useful in a standard crossover configuration
– for example
<-Crossover Ganging
Ganging=1+4 2+5 3+6
…would be a logical ganging arrangement if the crossover was set up as a 3 x 2 way – linking
the control and adjustment of all “Low” outputs together, all “Mid” outputs together and all
“High” outputs together.
However, if the crossover has not been set up with a preset routing configuration, then it may
be required to set up the ganging to compliment this configuration. This is achieved using the
Free Assign mode.
This is selected from the preset ganging choices, which are:
Ganging = None
Ganging = Free Assign
Ganging = 1+2+3+4+5+6
Ganging = 1+4 2+5 3+6
Ganging = 1+3+5 2+4+6
Ganging = 1+3 2+4
Selecting 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 quite 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
Gang Output 5 with 1
Ganging is cleared by selecting Ganging=None from the initial choices given above.