Illusonic IAP4, Руководство пользователя

Страница: 46 / 60

44 Illusonic IAP 4 Chapter 7
Menu: Bass Management
7.3
Bass Management Menu
MENU
BASS MANAGEMENT
BASS GAIN TRIM
MENU
BASS MANAGEMENT
CROSS OVER 2
MENU
BASS MANAGEMENT
CROSS OVER 1
MENU
BASS MGMT
LOUDSPEAKERS
In addition to the choice of large/small for each loudspeaker, the bass man-
agement cross-over filter parameters have to be set to match the used loud-
speakers. The figure above illustrates the Bass Management menu and
selection of its sub-menus.
1
The sub-menus are:
1 Sub-menus are selected by using
Rotary (Turn) .
Select (Rotary Push) enters a sub-menu and Menu
exits it.
LOUDSPEAKERS
FL
LARGE
For each of the loudspeakers you can select
whether it is a large (full-range) or small loudspeaker.
There are two options for small loudspeakers, “Small
1” and “Small 2”, for which different cross-over pa-
rameters can be chosen.
2 Order 2 transitions relatively gradually (12 dB per
octave) between bass and higher frequencies, while
Order 3 and Order 4 transition more abruptly (18 and
24 dB per octave, respectively).
Order 2, 3, and 4 are “power complementary
Butterworth” filters. Being “doubly complementary”,
Order 3 has particularly good phase/magnitude
behavior. Order 2-alt and 4-alt are “Linkwitz-Riley”
cross-over filters.
CROSS OVER 1
ORDER 3
40 Hz
CROSS OVER 2
ORDER 2
80 Hz
For “Small 1” and “Small 2” loudspeakers cross-
over filters can be specified in these two sub-menus.
In addition to the filter order (2, 3, 4, 2 alt, 4 alt)
2
,
you can choose the cross-over frequency, determin-
ing below which frequency signal is considered to
be bass.
BASS GAIN TRIM
0.0 dB
Only applied without a subwoofer, this sub-menu
allows to adjust the gain of the bass signals, ex-
tracted from small 1 and small 2 loudspeakers, to
fine-tune the level of bass reproduced over large
loudspeakers.