System configurations – Martin Audio DX2 User Manual
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All material © 2007. Martin Audio Ltd. Subject to change without notice.
Note that the DX2 will default to its previous condition if the above operations are
not completed and no buttons are pressed for 20 – 30 seconds.
Amplifier power, amplifier gain and limiter settings
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. The limiter parameters protect the loudspeaker from long-
term overloads whilst the correct amplifier specification protects the loudspeaker
from transient overloads and clipping.
Limiter thresholds are factory preset for power amplifiers with the pro-audio
voltage gain* standard of 32dB (x40).
* 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 use a power amplifier set to a different gain standard, make absolutely
sure it is set to that gain and adjust the limiter threshold settings as follows:
Power amplifier gain
Limiter threshold adjustment
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)
System configurations
Your Martin Audio DX2 Loudspeaker Management System must be correctly
patched.
See the following standard preset and output channel allocation details.
Note that this information may be adapted for experienced technicians to create
special user presets for the products listed – but please read the covering notes…