Overlapped Frequency Card Configuration; Placing A Frequency Card - Altair FA-524 Owner's Manual

OVERLAPPED FREQUENCY CARD CONFIGURATION:

Sometimes in order to increase the efficiency in low frequencies, or so that the system is
more versatile and could work with or without subwoofer, it is necessary overlap the low and
subwoofer bands. In order to carry out this should configure a frequency card with the low
pass filter to the relevant frequency that wants for the subwoofer, and annul the high pass
filter. The ATTACK and RELEASE resistors will belong to the frequency of the low pass filter,
and the ∅ capacitor will be of 33nF because of being a subwoofer card.
The next table shows the components value of a subwoofer frequency card overlapped
at 100/ 0 Hz:
OVERLAPPED SUBWOOFER FREQUENCY CARD COMPONENTS (100/0 Hz)..
LOW PASS FILTER (100 Hz)
C1,C2,C3,C4,C5,C6
33nF

PLACING A FREQUENCY CARD

In order to place a frequency card, follow the next steps:
1
Select the connector where wants to insert the frequency card.
2
With an angle of about 60º with regard to the main board, takes the frequency card
toward the connector socket, making sure that the polarization card slot is guided toward the
printed number that defines to the main board connector.
3
Once located the frequency card in the connector socket, push back the frequency card,
until notes that the connector subjection clips have caught to the card.
HIGH PASS FILTER (0 Hz)
R1 C7,C8,C9,C10
33K PUENTE
ATTAC
R2,R3
--
19
RELEAS
220K 150K
∅ ∅
33nF