Operation; Starter's Guide To Crossovers; Overview On The Different Functions; Limiter-Function - Omnitronic LXO-230 Mode D'emploi

OPERATION

Starter's guide to crossovers

With an active crossover, you can separate the output signal of your mixer in different frequency ranges. In
this way you can define which signal portion will go to which amplifier.
The Omnitronic crossover can either be run in 2-way stereo or in 3-way mono mode.
Stereo operation is to be used in medium-sized and larger discotheques.
Mono-operation is to be used for larger PAs and requires 2 crossovers.
The crossover is delivered in 2-way stereo mode. If you wish to run the crossover in 3-way mono mode,
please press the stereo/mono switch.

Overview on the different functions

Limiter-function

The LXO-230 features a limiter-function with 4 independent limiters (one per output). The limiter-function can
be activated via the Limiter-button. The limiter level can be adjusted via the treshold-control between -6 and
+18 dB.
The limiter serves as an additional clipping protection to avoid speaker damage. The signal level is always
limited to the adjusted threshold-level.
In most cases, it is sufficient to adjust the threshold-value to the clipping level of the connected amplifier.
Nevertheless make sure that the amplifier does not distort.

Horn EQ-function

Modern Constant Directivity horns have a roll-off in the high frequencies. In order to compensate the roll-off,
the LXO-230 offers the Horn EQ-function in order to boost the signal at 15 kHz by 12 dB.

Low Cut-function

With the Low Cut-function, you can attenuate all signals below 30 Hz. Please keep this button pressed if you
do not need these extremely low frequencies at any rate. If your speaker-system does not support these
frequencies, danger of speaker damage!
Sub ∑-function
With the Sub ∑-function (say Sub Sigma), you can route the mono sum of the lows to the low-outputs. In the
mono-mode, this function is automatically disactivated.

Delay

With the delay, it is possible to compensate differences in the running distances between different speaker-
systems or speaker-systems at different installation spots.
How to calculate the delay-time:
The delay-time T equals the distance in meters (D) divided by the speed of sound (C).
T=D/C
How to calculate the speed of sound: C=20.6 * (273 + °C) in meter per second.
The maximum delay time of the LXO-230 is 4 ms, which equals to 1.42 m at 25° C. This distance is sufficient
for most speaker installations, as even the very large throw hors measure 1.2 meters at best.
ø-Function
The phase of each output can be inverted. In order to do so, press the phase-invert button of the respective
output.
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