Apogee APL-220, Руководство пользователя

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(2) Using The APL-220, -500, and -800 with Subwoofers
To broaden the scope of applications for the APL-220, -500, and -800, they
can be used with an accompanying subwoofer, such as the Apogee APL-
1 0 or
APL-
1
2. A subwoofer is intended to extend the response of a full-range sys-
tem to a lower frequency than would be possible with the full-range system
alone. In some applications, the subwoofer is also intended to provide more
overall low-frequency power to create a punchier, more dramatic sonic
effect.
For many applications, a ratio of two, three, or four APL-220, -500, and -800
speakers to one subwoofer is a good starting point, however, the optimum
ratio may vary according to your specific needs, the style of music to be
reproduced, the acoustical conditions of the venue that the system will be
operated in, and the model of subwoofer.
If the full-range system already has substantial low-frequency capability, as do
the APL-220, -500, or -800, there will be a certain amount of overlap between
the full-range and subwoofer systems, causing an energy build-up in the over-
lap region. Depending on the desired results and the room acoustics, this
energy may or may not be beneficial. To avoid such a build-up, the APL-220,
-500, or -800 may be high-passed.
High-Passing the APL-220, -500, and -800
When used with a subwoofer, the APL-220, -500, or -800 can be high-passed
by means of a built-in, switchable High-Pass Filter.
The switchable High-Pass Filter on the APL-220, -500, and -800 provides a
1
2 dB/octave slope @ 80 Hz. With the
1
2 dB/Octave High-Pass Filter in
place, the speakers become capable of approximately 6 dB greater overall
output than when used in the flat (full-range) mode.
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