User guide

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: