XTZ SUB 12.17, Руководство пользователя

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10
Receiver/Pre-amp
Without
Automated Setup
Older receivers and/or music preamps may not provide an automated setup function.
With these sytems, optimal calibration usually requires some type of test equipment
be utilized to provide test tones and take measurements to properly calibrate your
system. Some equipment you may use for this includes:
-
One of our measurement systems Room Analyzer II / II Pro . They are
excellent tools to use when optimizing and setting up subwoofer/-s or other
speakers in a system.
-
Test signal source; pink noise and/or sine wave of various frequencies (CD,
DVD, your receiver/preamp, or external measurement equipment)
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SPL meter
-
RTA or other frequency response measurement tool (optional)
-
Start with a quiet room free of excess background noise (e.g. people talking,
kids playing, dogs barking, etc.).
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Verify that subwoofer control settings match illustrations for your type of
system configuration
-
Set any receiver/pre-amp speaker settings to an appropriate starting point
(e.g. crossover). We recommend 80Hz crossover as a good starting point.
-
Start playing a test signal with energy in the subwoofer crossover region (e.g.
full bandwidth pink noise) through all speakers
-
While observing an SPL meter (or listening to the mid-bass level), have an
assistant adjust the “PHASE” switch between 0° and 180° and observe any
change in mid-bass level near the crossover frequency. Set the control to the
position with the highest/loudest amount of bass.
-
Play a test signal (e.g. pink noise) through only 1 speaker at a time. If using
your receiver, you may need to enter it’s setup mode to perform this function.
-
Place an SPL meter in your typical listening position, approximately at ear
height (use of a tripo may be required), and set to “C” weighting and “Slow”
response (if those settings are available)
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Adjust volume to a modest level -typically 75-85dB (loud enough to clearly
hear, but not excessively loud)
-
Adjust controls as necessary to play the same test tone through each speaker
and subwoofer/-s in the system, 1 speaker at a time.
-
Adjust the individual channel gain/trim of your equipment to obtain the same
SPL reading from each speaker as you measured from the first speaker
NOTE
A home theater receiver may walk you through portions of this procedure. Follow any
instructions from your receiver’s owner’s manual as applicable to your system setup.
Once finished, listen to some familiar music and movie tracks. Minor adjustment of
the levels may be desired. Do not be afraid to experiment with adjustments and
try different EQ settings to find what may improve the sound in your system and
room the best!
Volume, phase and crossover frequency (also placement of listening position and
placement of the sub) are depending on each other, if one of these parameters is
change the other are also changed. i.e. if the crossover frequency is changed it also
influences the volume and phase, so they need to be compensated for this effect.
In a room there is never any absolute correct phase over the whole frequency range,
phase needs to be set to arrange the best result over the whole frequency range.
There are limitations on how well the bass management works in a receiver/
processor. The settings for the subwoofer/-s might need to be adjusted manually
either on the subwoofer/-s OR preferably in the receiver/processor. For some cases
when having only one “SUBWOOFER” output jack and multiple subwoofers and the
subwoofers are not placed symmetrically in the room (e.g. having an opening on
one side of the room) you might need to apply different settings for the “PHASE”,
“VOLUME” and EQ setting on the subwoofers. There is also the option to use one
of our measurement systems Room Analyzer II / II Pro . They are excellent tools
when optimizing and setting up subwoofer/-s or other speakers in a system. Do not
be afraid to experiment with slight adjustments to find what may improve the sound
in your system and room the best way.
Do not hesitate to contact us at info@xtz.se for questions about settings. We are
happy to assist you in optimizing your system!