Dynaudio SUB 250 MC 用户手册

Try different subwoofer positions and settings, before you finally choose a setup.

When looking for the best subwoofer position in the room, note down the ideal setting 
you found for a position. When moving the subwoofer between two positions you will 
be able to set the subwoofer to the same configuration as found before. 

When experimenting to find the optimal settings, use a couple of music tracks with 
repetitive bass across a large spectrum. The tracks should be sufficiently different 
from each other and each should cover a wide bass-range. Musical instruments, such 
as a double-bass, bass guitar, church organ, etc. covering a wide spectrum in the 
bass region and above, are very suitable as these depend on accurately balanced 
subwoofers and main speakers.

Although in general it is best to make adjustments in the sequence outlined below, 
note that changing one setting may influence another. For example, finding the right 
setting for phase may result in having to decrease gain, even if this was set correctly 
before. It is recommended that you double-check the previous settings before moving 
on to the next one. Obtaining the best integration of the subwoofers generally involves 
a considerable amount of repeated fine-tuning.

With the GAIN control you can adjust the relative volume level of the subwoofer to the 
main speakers of the system:
X Play the same track a couple of times, adjusting the level so that the instrument 

sounds homogenous across its range.

If you find that at certain specific bass tones the response is either too loud (bloated 
sound) or soft (thin sound), it may be that you have to experiment further with the 
location of the subwoofer and/or the cross-over settings. 
X Refer to the sections “Positioning the subwoofer” on page 12 and “Cut-off 

frequencies” on page 14 for further information.

Note: When using multiple subwoofers, ensure that all settings such as level, cut-off 

frequency, phase and LF extension are identical. Use the LFE and Slave 
mode options to ensure that all subwoofers operate on the same settings 
(refer to chapter “Multiple subwoofer connections” on page 8).

Matching the frequency responses of subwoofer and speakers has an important 
impact on the overall sound quality, when integrating a subwoofer into a audio-video-
system. In general a large, floor-standing speaker still has significant output in the 
deeper bass range, whereas a very small speaker will not be able to reproduce deep 
bass at all. In the first case a bump in the overlapping area will cause a louder or even 
bloated sound while in the second case an acoustic hole will be experienced. 
The following figures visualize the possible results (please note that all curves are for 
illustration purposes and do not show exact filter characteristics).