TDA7402_07 datasheet(29/71 Pages) STMICROELECTRONICS

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TDA7402

Audioprocessor part

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4.13

Subwoofer

Several different applications are possible with the subwoofer circuit:

Subwoofer filter OFF

Main source stereo (AC coupled)

Second source stereo (DC coupled)

Main source mono differential (DC coupled)

Second source mono-differential (DC coupled)

Subwoofer filter ON

Main source mono differential (DC coupled)

Second source mono differential (DC coupled)

Center speaker mode (filtered mono signal at SWL, unfiltered mono signal at

SWR)

In all applications the phase of the output-signal can be configured to be 0° or 180° . In the

center speaker mode only at the filtered output the phase is changed.

Figure 20.

Application 1 using internal highpass and mono low pass filter

VOICE BAND

BANDPASS

BASS-FILTER

LOWPASS

220nF

MS MONO

MAIN SOURCE

RIGHT CHANNEL

MAIN SOURCE

SPEAKER FRONT

SWIN

ACINR

ACINF

OFF/ON

ACOUT

SPEAKER REAR

SPEAKER SUBWOOFER

D00AU1156

LEFT CHANNEL

SECOND SOURCE

25K

50K

25K

SEC.S MONO

PROGRAMMING

5/1xxxxxxx

7/xxxxx1xx

10/xxxx10xx

12/1010xxxx

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