Barefoot Sound MiniMain12, Owner'S Manual

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6
5. Protection
Limiters
Peak Limiter
The Subwoofer, Woofer, Midrange and Tweeter channels have individual Peak Limiters designed to pro-
tect each driver from large, short duration 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 effect on the audio signal below their thresholds. The front LED indicator light
will flash RED when a Peak Limiter on any of the driver channels is triggered. The duration of such
events is only a fraction of a second. Therefore, the LED flash may appear pink or orange as the eye
naturally blends the normally aqua-blue color of the LED with the red.
RMS Limiter
The Subwoofer, Woofer, Midrange and Tweeter channels have individual RMS Limiters designed to pro-
tect each driver from long duration 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
effect on the audio signal below their thresholds. The front LED indicator light will flash RED when a
RMS Limiter on any of the driver channels is triggered.
Caution: Signals large enough to trigger any of the limiters can generate very high sound pressure levels
that may result in permanent hearing damage.
Over Current
In the event of a large audio input signal that might damage the amplifiers or power supply due to cur-
rent overload, the power supply is designed to enter into Over Current protect mode. This state typi-
cally results from a large, broadband input signal burst that flat lines the limiters on all four channels
simultaneously. While the fault persists the amplifier 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 re-
boot within a few seconds. If the speaker fails to reboot or the LED light goes out completely, discon-
nect the audio input cable and power cycle the speaker. Verify the signal level is attenuated before
reconnecting audio input cable.
Caution: Signals that cause Over Current protection to trigger can generate very high sound pressure
levels that may result in permanent hearing damage.
6. Positioning
The acoustic center of the MiniMain12 is located at the center of the tweeter. The MM12 is designed to work
equally well as a nearfield, mid-field or far-field monitor. The minimum recommended listening distance is 1
meter (39.4”). While speaker positioning can be highly room dependent, a good starting point is to create an
equilateral triangle between the two speakers and the listening position. The speakers should be angled inward
approximately 30 degrees so the tweeter axes aim towards the listener’s ears, crossing a few inches behind the
head.
The speakers should be arranged symmetrically with the midrange drivers oriented to the outsides or insides of
both speakers.
Soffit mounting the MiniMain12 is not recommended .