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CONTENTS
Configuring a factory preset
Once a preset has been loaded there are three user configurable
parameters. Note: all other parameters accessed via the GAIN buttons,
such as crossover points and parametric equalisation are locked and
cannot be altered by the user.
1.
Output gain trim: The gain of each output channel can be adjusted by
plus or minus 6dB. This is intended for normalising power amplifiers of
differing gain. To alter gain trim press the GAIN button of the channel
to be adjusted. The display now shows "Trim = 0 dB". Use the rotary
control marked GAIN to adjust the channel gain as required.
2.
Output delay: This parameter can be altered in a system incorporating
more than one stereo pair of speakers in order to set inter cabinet
delays, for example: between a subwoofer and a mid-high cabinet.
Use the rotary FREQ control for 1ms increments and the rotary Q
control for 2.6ms increments. Note: inter driver delays within a cabinet
are linked together so that altering one delay will automatically adjust
the other to keep drivers perfectly aligned.
3.
Output limiters: All factory presets are supplied with the limiters set at
their maximum level and with the time constant set to automatic. Use
the rotary GAIN control to adjust the limit level. It is essential that the
user sets the correct limit level in order to protect both amplifiers and
speakers in the system. Note: the correct limit level is determined by
the output of the power amplifiers and power handling of the speaker
system. As a general rule of thumb, if the amplifier is clipping turn the
limit level down! Please refer to Appendix 1 for a table of dBu to Vrms
conversion.
The user can also edit the gain of the input channels as well as the overall
system delay. This is most applicable when configuring a system that
features multiple speaker systems and multiple DX1 controllers.
Note: all of the above settings are retained when the unit is switched off.
Once the preset has been configured it can be locked so that the unit
cannot be accessed by unauthorised personnel, see 'Security Sub-menu'
on page 18.
For a description of how to connect signal inputs and outputs to the DX1
please refer to the block diagrams on pages 11 and 12. Please note how
the output connector configuration changes with respect to frequency
bands (eg: low, mid, high) as the configuration of the controller changes,
i.e. 2x2 way, 1x4 way, 1x6 way etc. Appendix 3 explains which outputs the
frequency bands are assigned to for each preset.
Once the preset is loaded, configured and connected to the rest of the
system in accordance with the block diagrams on pages 11 and 12, it is
now ready for use.
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Martin Audio – DX1 Speaker Management System
APPLICATIONS GUIDE
8
GUIDES
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