Martin-audio DX2 User Manual download pdf (Page 5)

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…

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Martin-audio DX2 User Manual Page 5