Bedienungsanleitung Rotel RSX-1550 (Seite 47 von 54) (Englisch)

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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.

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

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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

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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

Rotel RSX-1550 Seite 47

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