respect to the studio room boundaries.
Placing a subwoofer close to or behind the listening position, even in multi-channel installations, generally results
in inferior subjective performance, especially in terms of stereo imaging.
Note
Two subwoofers used in a single installation can improve performance by maintaining low frequency stereo
separation and effectively averaging the effects of low frequency room resonances (room modes). Please see
installation and configuration
, below for multiple subwoofers. A simple place to start is by spacing multiple
subwoofers equally across the front wall, as this can help stop width modes from forming.
Moving the subwoofer closer to walls and corners will generally increase the amount of bass. Although the extra
bass can be compensated for by reducing the volume level of the subwoofer relative to the rest of the system,
this can result in uneven bass response at the listening position. Experiment with the position of your 18S to find
one which yields the best compromise between convenience, volume and even bass response.
When using a single subwoofer, placing the subwoofer at the listening position, moving around prospective
placement positions and listening/measuring to the result can often give a good indication of the performance of
the subwoofer. Using a broadband signal, such as pink noise available in the RTA section of the Dynaudio Sound
Meter app (available free from the Apple app store), should highlight any impact of room modes in the frequency
response.
Every studio room will have “room modes”, where at specific locations and frequencies, the bass may be under or
overemphasised. This effect is likely to be stronger in square and rectangular shaped rooms. Experimenting with
the position of the subwoofer is likely to reap benefits in terms of minimising room modes.
Using Distance compensation
The 18S incorporates signal processing that can compensate for the time delay and volume level differences
between the subwoofer and monitors resulting from their relative positions with respect to the listening position.
Once you have positioned your subwoofer, measure the distances as illustrated. The measured distances should
then be specified at the appropriate locations in the subwoofer configuration menu. The configuration menu is
described in the Configuration section of this manual.
The 18S signal processing is able to compensate for a maximum of 5.35 m difference between subwoofer and
monitor distances to the listening position.
Installation
13
Summary of Contents for 18S
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