Velodyne VI-Q, Руководство пользователя

Страница: 17 / 44

VI-Q MANUAL WWW.VELODYNEACOUSTICS.COM
ENGLISH
17
SERVICE
What is the crossover frequency and how is it set?
The crossover frequency is set to a specific frequency depending on the speaker system. Often 80 hertz is recommended
to start, allowing the subwoofer to reproduce frequencies below this level while filtering out higher frequencies. Most
subwoofer crossovers are user-adjustable (e.g., from 50 Hz to 180 Hz on the VI-Q series), so you can find an exact match
for your system at home. The goal of the setting is a seamless transition between the main speakers and the subwoofer,
which means that bass can no longer be located in the room at best. If you can hear exactly that the bass is coming from the
direction of the subwoofer when listening to music or watching movies, the setting needs to be adjusted. If the main speakers
of the system are full-grown 3-way floor-standing speakers with large woofers, it is also worth trying out a frequency of 60
Hertz. If, on the other hand, they are small satellites or bookshelf speakers, a setting of 100 Hertz and more may make sense.
At this point, it is important to experiment a lot with familiar music and film clips - because only repeated listening will lead to
a perfect result.
Modern AV receivers and preamplifiers also have integrated crossovers. This is usually less common with stereo receivers. If a
receiver is used in the living room or home theater, it is advisable to set the crossover frequency to the highest frequency.
How do you set the phase on the subwoofer correctly?
A phase control allows the phase to be adjusted continuously within a range of 0 degrees to 180 degrees. It is helpful when
the subwoofer and the floorstanding loudspeaker are not positioned at the same distance from the listening position. This is
because the reproduction of low tones from the subwoofer and the main speakers can cause cancellation in the bass range
because the waves neutralize each other. With the phase control it is thus possible to align the sound waves from different
sources. This setting is best made by ear from the later reference position.