How to Improve Audio Quality with Xtrons PST10RVT_L?

#1
I purchased Xtrons PST10RVT_L car head unit about 3 months ago for my Toyota car. I am satisfied with its looks and the performance. However, I don't know how to improve the music quality with it.

Anyone has used the DSP feature? What are the best settings for DSP? I am new to this and don't want to mess it up with the settings. Please let me know if you have any suggestions.
 
#2
I have one XTRONS but it does not come with DSP chip, but it still offers excellent sound quality. I think i may still be able to improve the speakers and occasionally the amplifiers to improve sound quality. if XTRONS new model has built-in DSP, i think it comes a 13-band parametric EQ for fine-tuning sound
 
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