Mackie SRM-Flex, Руководство пользователя

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Owner
’s Manual
15
Owner’s Manual
Protection Circuitry
SRM-Flex employs a built-in limiter for less distortion
at peak levels. A dynamic bass response circuit
provides optimal low frequency response regardless
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 SRM-Flex under reasonable
and sensible conditions. Should you choose
to ignore the warning signs [e.g. excessive distortion],
you can still damage the speaker 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. SRM-Flex is 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 SRM-Flex resumes normal operation.
If the thermal switch activates, try turning
down the level control(s) a notch or two to avoid
overheating the amplifier. Be aware that direct
sunlight and/or hot stage lights may be the culprit
of an amplifier overheating.
AC Power
Be sure the SRM-Flex is plugged into an outlet
that is able to supply the correct voltage specified
for your model. It will continue to operate at lower
voltages, but will not reach full power. Be sure
the electrical service can supply enough amperage
for all the components connected to it.
We recommend that a stiff (robust) supply of AC
power be used because the amplifiers place high
current demands on the AC line. The more power that
is available on the line, the louder the speakers will play
and the more peak output power will be available for
a cleaner, punchier bass. A suspected problem of “poor
bass performance” is often caused by a weak AC supply
to the amplifiers.
Never remove the ground pin on
the power cord or any other component
of the SRM-Flex. This is very dangerous.
Care and Maintenance
Your SRM-Flex will provide many years of reliable
service if you follow these guidelines:
• Avoid exposing the SRM-Flex to moisture.
If it is set up outdoors, be sure it is under cover
if rain is expected.
• Avoid exposure to extreme cold (below freezing
temperatures). If you must operate the SRM-Flex
in a cold environment, warm up the voice coils slowly
by sending a low-level signal through them for about
15 minutes prior to high-power operation.
• Use a dry cloth to clean the cabinets. Only
do this when the power is turned off. Avoid getting
moisture into any of the openings of the cabinet,
particularly where the drivers are located.