Part Number:TAS5731M
Hi,
We use the TAS5731M as a 2.1 amplifier. Two tweeters are responsible for more than 5Khz of the left and right channels. A 4-inch woofer is responsible for the 10-5Khz signal.
Our idea was to adjust the left channel treble by the EQ1, the treble adjustment by the EQ2 to the right channel, and the bass adjustment by the EQ4.
However, some problems were found when using TI's TAS5731M DEMO board and TAS57X1 GDE computer tool.
1. As long as any of the items 1 to 7 of BQ1 is set to HIGH PASS, the BQ4 channel has no bass (the bandwidth of the 10-5 kHz signal cannot be achieved).
It looks like the signal on the EQ4 channel is only 5K or more. If only the 8th setting is HIGH PASS, it has no effect on EQ4.(As shown below )
2. During the test, it was found that in the 2.1 mode, the bass is not sounded when the signal is only input to the R channel , and only the R channel treble is sound (basically, the bass should also sound). If only the L channel is input, the L channel's treble and bass are all sounded (normal).
Problems:
1. From the diagram on the tool, the adjustment of EQ1, EQ2, and EQ4 should be independent. But why does the regulation of EQ1 affect the EQ4 channel?
2. In the 2.1 mode, the bass signal should be taken from the L and R channels. Why does the bass now only take the signal of the L channel but not the R channel?
thanks.