5
6.0 Protecon Features
6.1 Limiters
Peak Limiter
The Woofer, Midrange and Tweeter channels have individual Peak Limiters designed to protect each
driver from high amplitude, short duraon audio input signal spikes that might cause damage due to
over excursion of the voice coil. These limiters are implemented digitally within the DSP in such a man-
ner that they have zero eect on the audio signal below their thresholds. The front LED indicator light
will ash RED when a Peak Limiter on any of the driver channels is triggered. The duraon of such
events is only a fracon of a second. Therefore, the LED ash may appear pink or orange as the eye nat-
urally blends the normally aqua-blue color of the LED with the red.
RMS Limiter
The Woofer, Midrange and Tweeter channels have individual RMS Limiters designed to protect each
driver from long duraon, high amplitude audio input signals that might cause thermal damage due to
the voice coil. These limiters are implemented digitally within the DSP in such a manner that they have
zero eect on the audio signal below their thresholds. The front LED indicator light will ash RED when a
RMS Limiter on any of the driver channels is triggered.
Cauon: Signals large enough to trigger any of the limiters can generate very high sound pressure
levels that may result in permanent hearing damage.
6.2 Over Current
In the event of a large audio input signal that might damage the ampliers or power supply due to cur-
rent overload, the power supply is designed to enter into Over Current protect mode. This state typical-
ly results from a large, broadband input signal burst that at lines the limiters on all three channels sim-
ultaneously. While the fault persists the amplier power rails shut down, the speaker goes quiet, and
the front panel LED turns red. Once the audio input signal is turned down the speaker should reboot
within a few seconds. If the speaker fails to reboot or the LED light goes out completely, disconnect the
audio input cable and power cycle the speaker. Verify the signal level is aenuated before reconnecng
audio input cable.
Cauon: Signals that cause Over Current protecon to trigger can generate very high sound pressure
levels that may result in permanent hearing damage.
7.0 Posioning
The acousc center of the MicroMain45 is located at the center of the tweeter. The MM45 is designed to work
equally well as a neareld or mid-eld monitor. The minimum recommended listening distance is 1 meter
(39.4”). While speaker posioning can oen be dependent on the nature of the room, a good starng point is to
create an equilateral triangle between the two speakers and the listening posion. The speakers should be
angled inward so the tweeter axes aim towards the listener’s ears, crossing a few inches behind the head.
The speakers should be posioned symmetrically with both tweeters oriented to either the outside or inside.
Both orientaons are acceptable, however, we recommend starng with the tweeters oriented to the outside.
You may need to experiment to determine which arrangement is opmal in you room.
Since every room has its unique characteriscs, the opmal listening distances, speaker height and distances
from walls are also a maer for experimentaon.
