Müßen Mains und Center wirklich gleich sein ?

[kboe]

hallo Weha,

ich meine, man sollte schon möglichst gleiche lautsprecher verwenden. du siehst ja in deinem fall schon, dass nicht einmal damit ein überall gleicher klang erreicht wird.

lehrbuchmäßig müsstest du am center die weiche neu abstimmen, um den durch die größere schallwand lauteren grundtonbereich abzusenken......

und eventuell sogar zusätzlich noch den hochton anheben, um das 30° phänomen zu beackern

gruß
kboe

[We-Ha]

Ja, so etwas dachte ich mir schon ...

[tabw]

Selbst bei 3 identischen Standlautsprechern hinter der Leinwand klingen sie leicht unterschiedlich - stehen halt immernoch an verschiedenen Stellen im Raum.

Ist dann beim Film aber zu vernachlässigen - mir ist da zumindest bisher nichts aufgefallen, was mich veranlassen würden den Center mit dem EQ anzupassen.

[ropf]

Da ich grad den Toole am Wickel hab, hier seine Meinung zum Thema:

In a home theater, if broadband pink noise (not the common band-limited multichannel calibration signal) is switched to each of five identical loudspeakers, a listener facing forward will hear obvious changes in timbre. In jumping from the center to the left front or right front loudspeaker, a high-frequency boost may be heard. From there to either of the side surround loudspeakers, there are more timbral changes. This is as it should be.

To confirm that all five loudspeakers in a system are similar in timbre, it is necessary to face each of the loudspeakers as they play the same test signal. Then, and only then, can identical loudspeakers have identical perceived timbres. This is the timbre matching important to sound reproduction, not what is heard while facing forward. If a five-channel system reproduced a quintet of identical musical instruments, one would want each one reproduced identically, even though we know that, depending on incident angle, the sound from each one will be distinctively modified on
the way to our eardrums. After all, that is what would happen in a live situation.

Und weiter zu Center-LS vs. Phantom-Center:

One can reasonably speculate that a stereo phantom center image might present a problem because the perceived direction is 0° and the sound sources are at, say, ±30°, meaning that we may be applying the wrong directional “association” (0°) for sounds that are physically arriving from ±30°. This could be an Acoustical and Psychoacoustical Sense of Scale contributing factor to the perceived difference between a real center loudspeaker and its phantom image version. The real one is correct, and Figure 9.7 illustrates a substantial physical reason for there being a difference.