1
LED POWER INDICATOR
The green LED POWER indicator, located on the back of
the amplifier, will illuminate when the AC Power switch is in
the “ON” position. The LED POWER indicator will dim and
turn off when the AC Power switch is in the “OFF” position or
AC mains power has been disconnected from the loudspeaker.
If the POWER indicator does not illuminate when the
loudspeaker is powered on, verify the AC mains line cord is
properly connected to the loudspeaker and inserted into
the AC outlet. Verify the AC outlet at the venue of operation
is functioning properly. In the event of the AC mains outlet
functioning properly, but the loudspeaker fails to operate,
the loudspeaker may require servicing. Please contact
friedmanamps@gmail.com for service instructions.
2
PROTECT LED INDICATOR
If the power module overheats, the amplifier will go
into “protection mode” to limit further temperature rise. The
amplifier will take about 30 seconds to several minutes for
the temperature to drop and resume operation. When this
occurs, the exposed heat sink will feel hot to the touch.
3
LEVEL CONTROL
NOTE that LEVEL control provides about 12dB attenuation in
middle position. You will find that in most cases the best sound
(lowest distortions and lowest noise) will be achieved when LEVEL
control is set somewhere between middle and full clockwise
position.
4
LOW CUT SWITCH
ASM-10/ASC-10: Found beneath the LEVEL control, this small slider
switch engages or disengages the 100Hz 18db/Octave Low Cut filter.
Turn the LEVEL control clockwise to increase gain and counter
clockwise to decrease gain. When operating with the GAIN set at
1/3 volume or below, it may be possible to exceed the headroom
of input circuitry on your loudspeaker. If this is the case, reduce
the input signal strength and increase the gain of the loudspeaker
amplifier.
Always observe the red LIMIT LED on the amplifier panel. This LED
lights when a signal is clipping and the compressor-limiter is
activated. The ASM-10/ASC-10 amplifier employs a sophisticated
limiter circuitry, which monitors signal condition at both LF and
HF amplifiers and compresses the output signal when necessary
to protect woofer and compression driver from damages. Limiter
circuitry works very unobtrusively; you may not even notice when it
activates. It may prompt you to push input signal more, but it is a
good practice to have red LIMIT LEDs blink occasionally and not
constantly. A constant LIMIT LED light indicates a gross overloading
condition and should be avoided. Reduce the signal level if the
LIMIT LED lights or blinks constantly.
Overheating is usually caused by excessive ambient
temperature, direct sunlight for a prolonged period of
time during operation, or playing the loudspeaker past its
operational limits.
If thermal overheating occurs, reduce signal level to avoid
constant illumination of the LIMIT LED INDICATOR. In some
circumstances, for example when ambient temperature is
too high, you may need to set a fan behind the speaker to
improve ventilation at heatsink.
NOTE that LEVEL Control has a range of 30dB. It does not
attenuate output signal to zero. LEVEL control on the
loudspeaker is used to set optimal maximum level for
performance, not for constant control of sound volume. Your
Digital Amplifier’s master volume control should be used for this.
5
7
INPUT CONNECTIONS
GROUND SWITCH
-
All Full-range models have one XLR and one 1/4” input connector
marked INPUT. Both are balanced inputs.
Toggle between the “Lift” and “Earth” settings to eliminate any
un-wanted hum.
8
POWER SWITCH
Turns the ASM-10/ASC-10 on and off.
9
POWER RECEPTICLE
Plug the power cord in here.
10
FUSE
The ASM-10/ASC-10 is hardwired at the factory to be operated
at the proper voltage for the country in which the unit is sold.
In the event of needing to replace the fuse, be sure to follow
the specified Fuse Value listed.
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