TDA7416

14/27

1.6.5 DC-mode of equalizer band 1 (62/100 Hz)

In this mode, the DC-gain 4dB when set to 15dB boost.

Note: The center frequency, Q, DC-mode and boost/cut can be set fully independently for each filter.

1.7 Subwoofer Application

Figure 12. Subwoofer Application with Lowpass @ 80/120/160Hz and HighPass @ 90/135/180Hz

Both filters, the lowpass- as well as the highpass-filter, have butterworth characteristic so that their cut-off

frequen-cies are not equal but shifted by the factor 1.125 to get a flat frequency response.

1

10K

10

1K

100

Hz

-1

16

0

14

2

12

4

10

6

8

dB

dB

Hz

-50.0

-40.0

-30.0

-20.0

-10.0

0.0

10.0

100.0

1.0K

10.0K