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DRM P
rofes
sional P
ow
er
ed L
oudspeak
er S
eries
18
DRM Professional Powered Loudspeaker Series
The screen displayed on the previous
page and again below may be of particular
interest. Yes, it’s true – you CAN do
a factory reset and either choose to
save your user presets or not!
Illuminating and selecting the left-facing arrow
returns you to the previous screen.
About –
Displays the current information about your
loudspeaker, including the model, firmware and DSP
versions, temperature and favorite color. There is really
only one reason to go here and that is if you’ve been
directed so by Technical Support.
CONFIGURATION
MEMORY
1 2 3 4 5 6
ABOUT
CH2 IN
LO-Z
HI-Z
LOCK PIN
1 2 3 4
BACKLIGHT
FRONT LED
RESET
OFF DIM
ON
OFF
ON
RESET
Factory reset
Keep presets?
YES
NO
CONFIGURATION
MEMORY
1 2 3 4 5 6
ABOUT
CH2 IN
LO-Z
HI-Z
LOCK PIN
1 2 3 4
BACKLIGHT
FRONT LED
RESET
OFF DIM
ON
OFF
ON
ABOUT
FW :
DRM212 v1.0.29
TEMP :
29˚C / 85˚F
DSP :
DRM212 v111
Protection Circuitry
DRM loudspeakers employ a built-in limiter for less
distortion at peak levels. A dynamic bass response
circuit provides optimal low frequency response regard-
less of overall output level. Additional protection
includes automatic thermal shutdown should the amp
overheat. However, with Class-D amp technology, which
is highly-efficient, this should never be a problem.
The protection circuits are designed to
protect the loudspeakers under reasonable
and sensible conditions. Should you choose
to ignore the warning signs [e.g. excessive distortion],
you can still damage the speaker in the loudspeaker
by overdriving it past the point of amplifier clipping.
Such damage is beyond the scope of the warranty.
Limiting
The driver has its own compression circuit which
helps protect it from damaging transient peaks.
The compressor is designed to be transparent and
is not noticeable under normal operating conditions.
Overexcursion Protection
A subsonic filter circuit just prior to the power
amplifier prevents ultra-low frequencies from being
amplified. Excessive low-frequency energy can damage
the woofer by causing it to “bottom out,” also know
as overexcursion, which is equivalent to a mechanical
form of clipping.
Thermal Protection
All amplifiers produce heat. DRM loudspeakers are
designed to be efficient both electrically and thermally.
In the unlikely event of the amplifier overheating, a
built-in thermal switch will activate, muting the signal.
When the amplifier has cooled down to a safe
operating temperature, the thermal switch resets
itself, and the DRM loudspeaker resumes normal
operation.
If the thermal switch activates, try turning down
the level control a notch or two on the mixing console
(or via the Speaker Control knob) to avoid overheating
the amplifier. Be aware that direct sunlight and/or
hot stage lights may be the culprit of an amplifier
overheating.