ESI SW8000 - Manual (Page 9)

6. P OSITION OF THE S UBWOOFER IN THE S TUDIO
In theory, the best position for Subwoofer is midway between the satellite speakers, with its
front facing forward and in the same plane as the fronts of the satellite speakers.
Subwoofer SW8000 may, however, due to the very low distortion by design, so there is no
directional sound field from SW8000, in practice be moved quite far from this position
without any detrimental effect on the sound reproduction.
Different positions of the Subwoofer related to walls will affect its efficiency, and the room
influence on the frequency response. This can be compensated for by readjusting the filter
settings.
7. S ETTING OF L EVEL , P HASE AND S UBWOOFER & S ATELLITES C ROSSOVER
FILTERS
There are four control knobs on the rear of the Sub woofer SW8000.
These controls make it possible to match the low bass frequencies from the Subwoofer to
the bass-midrange-treble sound of any good satellite Professional Audio speakers for
optimum sound, and at the same time to compensate for room-effects and different positions
of the Subwoofer SW8000.
Your hearing is the final arbiter of correct settings.
The adjustments can be optimized without the aid of any tools except ear and good quality
music records.
Before you make final adjustments, make sure your basic Studio system is in good working
order.
Acoustic feedback
Since the SW8000 can produce a considerable output level at low frequencies, acoustic
feedback via the turntable can occur. To ensure that this is not the case, perform the
following test at installation of the SW8000.
Sep up the equipment or record-playing. Place the pick-up on a non-rotating record
(disconnect the turntable power cord if necessary). Tap the turntable while gradually
increasing the volume control. If there is a shift in sound character from the loudspeakers
(towards sustained sound) before the volume control has been advanced to a setting that
represent loud listening, acoustic feedback is a problem.
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