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Rotel RSX-1550 Manual

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46 47
English
RSX-1550 Surround Sound Receiver
46 47
English
RSX-1550 Surround Sound Receiver
Set the meter to its 70dB dial setting with SLOW response and C-
weighting, held away from your body at your listening position
(mounting the SPL meter on a camera tripod makes this easier). You can
point the SPL meter at each speaker as it is being measured; however,
positioning the meter in a fixed position pointing at the ceiling is easier
and probably produces more consistent results.
Increase the master volume control on the receiver until the meter reads
75dB (+5dB on the meter scale) when playing the test tone through one
of the front speakers. Then, use the individual channel adjustments on the
TEST TONE menu to adjust each of the individual speakers, including the
subwoofer, to the same 75dB on the SPL meter.
Note: Due to meter weighting curves and room effects, the actual
level of the subwoofer may be slightly higher than you measure.
T
o compensate, Dolby suggests setting the subwoofer several dB
lower when calibrating with an SPL meter (i.e. set the subwoofer
to read 72dB on the meter instead of 75dB). Ultimately, the
proper subwoofer level must be determined by personal taste and
some listeners prefer to set it above 75dB for fi
lm soundtracks.
Exaggerated bass effects come at the expense of proper blending
with the main speakers and place stress on the subwoofer and
its amplifier
. If you can localize bass from the subwoofer, the
subwoofer level may be too high. Music can be useful for fine-
tuning the subwoofer level as excessive bass is readily apparent.
The proper setting will generally work well for music and movie
soundtracks.
Remember the setting of the master volume control used during this
calibration. To play a Dolby Digital or DTS soundtrack at the reference
volume level, simply return to that volume setting. Note that most home
theater listeners find this setting to be excessively loud. Let your own ears
be the judge for deciding how loud to playback movie soundtracks and
adjust the master volume control accordingly. Regardless of your listening
levels, using an SPL meter to calibrate equal levels for all speakers in the
system is recommended.
Delay Setup
���������
The DELAY SETUP menu, which is reached from the MAIN menu, allows
you to set the delay for individual speakers. This ensures that the sound
from each speaker arrives simultaneously at the listening position, even
when the speakers are not all placed at equal distances from the listener.
Increase the delay to speakers located closer to the seating area and
decrease the delay to speakers located farther from the seating area.
This Rotel receiver makes setting the delay time for each speaker very
easy. Simply measure the distance (in feet or meters) from your seating
position to each speaker in your system. Set the measured distance in
the line for each speaker. The menu provides a line for each speaker
configured in your system and gives a range of settings up to 99 feet (30
meters) in 1 foot (0.3m) increments with each increment equivalent to an
additional delay of 1ms.
To change a setting, place the highlight on the desired line using the
UP/DOWN buttons and use the +/– buttons to increase or decrease the
delay. To return to the MAIN menu, press the ENTER button. Press the
MENU/OSD button on the remote to cancel the display and return to
normal operation.
Contour Setup
���
The CONTOUR SETUP menu allows digital adjustment of the bass and
treble response of each group of speakers in the system. For example,
if your center channel speaker sounds too bright, you could roll off the
extreme high frequencies.
SPEAKER (front/center/surround/center back/all): Select which
speaker or group of speakers to adjust. Selecting ALL allows adjustment
of the entire system as a whole.
DEFEAT (on/off): Selecting the ON setting defeats the contour
adjustment, bypassing the contour processing entirely for that speaker or
group of speakers.
HF CONTOUR: Adjusts the extreme high frequency slope over a range
of -6dB (MIN) to +6dB (MAX). Negative number settings reduce the high
frequency output; positive number settings increase it.
LF CONTOUR: Adjusts the extreme low frequency slope over a range
of -6dB (MIN) to +6dB (MAX). Negative number settings reduce the low
frequency output; positive number settings increase it.
The contour adjustments are designed to work at the frequency extremes
and be relatively subtle so that they do not have a negative impact on
midrange sounds. We recommend acclimating to the sound of the system
with the contour adjustments defeated and then making adjustments, if
necessary, to address specific speaker response issues or personal taste.
Note: You can also make temporary contour adjustments using
the TONE and UP/DOWN buttons on the remote. See the
Contour/Tone Settings section of this manual for details.
RSX-1550 English v2.indd 47 27/8/08 14:22:27
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