User's manual
K&F SONA SUB
KLING & FREITAG GMBH © 2010
Revision 1.2
Page 12 of 21
5.
Correct�Ratio�between�Top�and�Bass�Speakers
For a balanced sound reproduction, suitable for speech and average music material, one subwoofer
SONA SUB can be combined with 2 tops SONA 5. This is valid as long as the amplifiers for SONA SUB
and SONA 5 have the same overall gain and the SONA SUB 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 number of SONA SUB has to be doubled. For this type of use, the SONA 5 has to be
used with filtering, since there is a risk of mechanical otherwise. For maximum performance and oper-
ating 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 set-
up location, the spatial geometry, the required playback material and, last but not least, your person-
al 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.
5.1
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
Summary of Contents for SONA SUB
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