Hello

I will do a mp3-speaker for rc models with the dfplayer mini. And amplify it's signal(s) with an amplifier TPA3138D2 from Texas Instruments.

As I have read at the TI forum, differential signals to the TPA3138 are better for good sound quality than one direct line signal.

So my question is:

Shall I connect DACR as direct line to the positive differential input of the TPA3138 and connect the negative differential input to groun, or shall I connect SPK1 to the positive input of the differential input from the TPA3138 and SPK2 to the negative differential input?

According to TI-datasheet the differential inputs withstands -0.3 … 5.5V.

But like this, I would connect an already amplified signal to an amplifier what I am not sure if it is the way I should do or even will destroy the TPA3138 or the dfplayer mini.

Thanks for an answer.