Operation
Level
Combined frequency response Subwoofer
Main speakers
Frequency
Setting the phase (Phase)
With the phase settings you can adjust the phase relationship between the subwoofer and main speakers. If either subwoofer or main speaker are slightly out of phase in relation to the other, it can result in decreased bass output in the frequency response area where they overlap each other.
The phase relationship between subwoofer and satellite speakers is very dependent on relative distance, construction and working principles of the main speakers. The figure on the left shows a case whereby phase of the subwoofer and main speakers are incorrect in the critical overlap area, thus significantly reducing acoustic output in the listening room in that area.
Finding the correct phase setting:
1.Play a
2.Toggle the Phase switch between 0° and 180°.
Choose the setting for which you experience the most bass.
Note:
•You can not set the phase if the subwoofer is in slave mode. In this case the phase is controlled by the setting of the master subwoofer.
Setting the satellite cut-off frequency (SAT Highpass)
Depending on the bass capabilities of the speakers, the frequency range of subwoofer and speakers can overlap between 50 Hz and 150 Hz. A bump or a gap in the frequency response and thus a lower sound quality will be experienced if the system is not matched properly. In addition, small speakers and low powered amplifiers will particularly be affected by the low frequency signals, which again has a negative effect on the sound quality. Therefore it makes sense to limit the bass range of the connected speakers (called “satellites” in this case) by a highpass filter. The BM9S provides three settings to achieve this:
•Flat = no limitation
•60 Hz = frequencies below 60 Hz are
•80 Hz = frequencies below 80 Hz are
Setting the cut-off frequency
XSwitch SAT Highpass control to needed position.
10 | Dynaudio Acoustics BM9S |
