KLING & FREITAG K&F SONA SUB II - Manual (Page 9)

User's manual K&F SONA SUB II
KLING & FREITAG GMBH © 2014 Version 1.3 Page 9 of 19
4. Correct Ratio between Top and Bass Speakers
For a balanced sound reproduction, suitable for speech and average music material, one
subwoofer SONA SUB II can be combined with up to 4 tops SONA 5. This is valid as long as the
amplifiers for subwoofer and top skeakers have the same overall gain and the SONA SUB II is
mounted on a wall or on the open floor (reference use).
If more bass level is desired for DVD playback or reproducing very low-frequency signals (i.e.
motor sounds), then the subwoofer can used with 2 SONA 6 speakers or 1 SONA 8 speaker.
For this type of use, the subwoofer has to be used with filtering, since there is a risk of
mechanical otherwise. For maximum performance and operating safety, select use with the
CD 44. For maximum performance and operating safety, select use with the CD 44.
For an additional bass boost the level increase which occurs in room edges and room corners
can be used. The placement in room edges and room corners is also beneficial because of the
excitation of more room modes which results in a more even bass coverage across the room.
The correct loudness ratio between tops and bass is, therefore, very dependent upon the
bass’s setup location, the spatial geometry, the required playback material and, last but not
least, your personal preferences. For this reason, the ratio between tops and bass should
always be assessed on site, for example with a third-octave band analyser or a notebook with
corresponding measurement software.
4.1 Level increase because of adjacent areas
As shown in the following table, adjacent areas can lead to significant level differences.
Setup Location Name Level increase Pictogram
Freely suspended
Free field (full
space)
+/- 0 dB
On a surface
(Reference use)
Half space ca. +3 dB to +6 dB
In a space
boundary
Quarter space
ca. +6 dB to +12
dB
In a corner Eigth space
ca. +9 dB to +18
dB