After all the wiring connections are made and before the system is turned on
for the first time, you need to make some basic adjustments. It is important that
the High-Pass and Low-Pass Frequency Controls are set correctly before
turning on the system for the first time.
Setting the Crossover Frequency Controls
1.
Set the crossover frequency controls to the frequency recommended by the
speaker manufacturer.
. The following are some guidelines if this information
is not available:
• Most tweeters will not operate
below 5000Hz.
• Most 6” midranges will operate down to 80-100Hz.
• Most 5” or 4” midranges will operate down to 125-200Hz.
• Most subwoofers have decrea
sed sound quality when operated above
150Hz.
Depending upon the size/type of the midranges and tweeters and the type of subwoofer system, fine tuning these
adjustments may be required after the initial system set-up. Study the system design pages of this manual to
determine the proper settings for these controls.
Midranges and tweete
rs are easily damaged if they cross at a
frequency below their useable range.
2.
The Low-Pass frequency should be set the same as the High-Pass
frequency.
NOTE: An exception will be when the midrange is too small to play down to a very low frequency and the subwoofer
sounds distorted trying to “play up” to meet the mi
drange. This may require a gap or difference between the high
and low settings. Although not ideal, this is sometimes necessary to make the system work as well as possible.
Setting the Front and Rear Output Levels
Before setting front and rear level controls, disconnect the subwoofer output
and follow the directions below.
1.
Be sure the front and rear High-Pass crossovers are set properly
.
NOTE: When the QA3X is used in a 3-way system, the front outputs must be connected to the tweeter, amplifier, and
the rear outputs must be connected to the midrange amplifier.
2.
Turn the front and rear output level controls to their minimum setting.
3.
Turn the amplifier gain controls to their minimum setting.
4.
Turn the source unit on and increase the volume until distortion is heard,
then reduce volume to just below this point.
NOTE: This is the maximum usable musical signal for this source unit. Turning the volume beyond this point will
increase noise and distortion without an increase in musical signal. If you can increase the source unit volume to
maximum without audible disortion, raise the output level controls slightly and begin again.
5.
With the amplifier gains still at minimum and the source unit set at maximum
volume without distortion, raise the front and rear output level controls until
distortion is heard, then reduce the gain to just below this point. This is the
maximum output level for this system. For best performance, do not increase
beyond this point.
3-Way System
(Adjusting your System)
APPLICATIONS
13
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