Martin Audio DX2 manual Amplifier power, amplifier gain and limiter settings

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…

All material © 2007. Martin Audio Ltd. Subject to change without notice.