Description of the audioprocessor

TDA7418

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4.8

Treble

There are two parameters programmable in the treble stage:

4.8.1

Attenuation

Figure 16 shows the attenuation as a function of frequency at a center frequency of

17.5kHz.

Figure 16.

4.8.2

Center frequency

Figure 17 shows the four possible center frequencies 10k, 12.5k, 15k and 17.5kHz.

Figure 17.

Treble Center Frequencies @ Gain = 14dB

4.9

Speaker attenuator

The four speakers have independent soft step speaker controls. And their attenuators can

be adjusted from +15dB to -79dB with 1dB steps.

4.10

Subwoofer attenuator

The Subwoofer output is a single ended mono output. The attenuator is exactly the same

like the other speakers.