XTZ SUB 12.17, Руководство пользователя

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6
Installation
Cables - RCA
unbalanced
When installing your new subwoofer using unbalanced RCA connections, you should
use high quality shielded coaxial cables. Poor quality cables may pickup interference
and result in hum or noise. Keep the length of cable as short as possible and route all
input signal cables away from power cables to reduce the potential of induced noise.
Cables - XLR
When using balanced XLR connections, be certain to use a high quality cable that
maintains proper connections to each pin, the pins are often marked with numbers.
If an XLR cable that is improperly wired is used, subwoofer performance may be
degraded and you may experience increased noise and/or hum. Due to various
design differences between different brands & types of equipment (e.g. different
ground methods for power supplies and signal reference) and long cables required
in some installations, there is a potential for any product to pickup noise via the
connections and/or connected equipment (via ground loops).
If you have audible hum/buzz after completing your subwoofer connections, you
may need to modify your equipment’s cables, routing, or connection methods (power
line connections and/or signal cables).
Placement
While true subwoofers operate at extremely low frequencies which are primarily
omni-directional, keep in mind that frequency response and output level can
be dramatically influenced by where you place the subwoofer within the room.
Placing the subwoofer in the wrong location may degrade sound quality, limit low
frequency response and reduce maximum output level, substantially reducing your
overall listening pleasure. Many rooms often end up with non-optimal placement,
depending on the size and location of the furnishings within your room and if the
possibility to reposition them exists. Finding the optimal location usually requires
some experimentation to determine what sounds best in your room, from your
listening position. We suggest you read the general guidelines below and setup
the subwoofer in one of the suggested locations.
Proceed to listen to the loudspeakers multiple times, trying a few different locations
before settling on the final location. To do this, perform basic setup and listen to a
familiar music track or movie scene. Then move the loudspeakers to an alternate
location & repeat listening to the same music track or movie scene. If you have a test
CD and SPL meter or preferably one of our measurement systems (Room Analyzer
II / II Pro), performing a basic frequency response test can help you determine which
location provides the best frequency response.
General guidelines
In most rooms, the optimum location for your subwoofer is in the closest solid front
corner or somewhere along the front wall in line with your front speaker.
This location typically offers optimal energy coupling with the room, front-speakers
and the deepest low frequency extension, with the best high impact bass. Try to
avoid location for a subwoofer that is far away from walls or near the center of your
room. When using a pair of subwoofers in stereo, it is preferable to place each
subwoofer by the satellite of the same channel, see figure below to the left. If you
want a more flat frequency response and the bass evenly distributed over a larger
area of listening positions, then four subwoofers one in each corner is a terrific option.
The figure below to the right shows alternative subwoofer placement options with
subwoofer/- placed at the midpoint of the wall. This can be used for one subwoofer
with the subwoofer placed in the front, for two subwoofers with the subwoofer
placed at the front and back and for four subwoofers with the subwoofers placed
in the mid point of each wall.