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ENGLISH
SETUP
Clip limiter
OFF
Clip is the result of an amplifier running into power supply
limitation. The maximum output voltage that any
amplifier can produce is limited by its power supply.
Attempting to output a voltage (or current) level that
exceeds the power supply result in a flattening effect on
the signal, making it look cut off or "clipped". A clipped
waveform exhibits extreme harmonic distortion,
dominated by large amplitude odd-ordered harmonics
making it sound harsh or dissonant. The clip limiter
detects this and reduce the gain to minimize the amount
of overdrive. To preserve as much of the program
dynamics as possible, limiting reduces the average
program level until peaks barely clip. Each channel has
its own clip limiter, and you can switch it on or off. When
driving full-range speakers, clip limiting reduces high
frequency distortion caused by bass overload. It also
protects higher frequency drivers from excess overdrive
and harsh clipping harmonics.
HPF (Hi-Pass Filter)
OFF
A filter having a passband extending from some finite
cutoff frequency (not zero) up to infinite frequency. Also
known as a low-cut filter. HPF rolls off signals below
40Hz. The HPF removes frequencies below 40Hz. The
reproduction of the signal's bass portion is thus
optimized, since ultra-low, distracting frequencies are
eliminated, and more power is available for the
reproduction of the wanted segment of the signal. You
should set up the filters so they best suit the frequency
response of your speakers, since some speakers are
particularly sensitive to over-excursion. The 50Hz filter
works well with most compact full-range speakers.
5
LIM
ON
HPF
ON
Mode Select
PARALLEL
Stereo Mode
In stereo mode, both channels operate independently,
with their input gain controls. Signal at channel 1's input
produces output at channel 1, while signal at channel 2's
input produces output at channel 2's output.
Recommended minimum nominal load impedance for
stereo operation is 2 ohms per channel.
Parallel Mode
When set to Parallel mode, a signal applied to channel
1's input will be amplified and appear at outputs for both
channel 1 & 2. With set to parallel. The parallel mode is
well-suited for applications in which driving two speakers
with the same signal but with separate amplification.
Bridged Mono Mode
Bridged mono mode straps both amplifier channels
together to make a very powerful, single-channel
monaural amplifier. One channel "pushes" and the other
channel "pulls" equally, doubling the power over that of
either channel alone. Therefore the voltage is doubled,
the peak power is quadrupled, and program power is
roughly three times as high as that of the individual
channel. Signal is applied to the channel 1 input only and
channel 1 input gain control is used to adjust signal level.
The input gain control belonging to channel 2 are not
used.
Note :
Bridged mono mode is to be used only when the A
Series is connected to a 4 or 8 ohms speaker load. Use
of Bridged mode with speaker loads of 4 ohms or less
can result in severe damage to the unit due to excessive
heat and current limiting.
Use extreme caution when operating the amplifier in
Bridged Mono Mode. Never ground either side of the
speaker cable when the amplifier is in Bridged Mono
Mode ; the speaker load must " float " away from the
amplifier chassis.
MODE
BRIDGED
STEREO
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