diffirent DSP have diffirent work effect.
And the price is different.
Our 2 version dsp have no problem.
Version B dsp is 4 in put and 4 output,
version E,F dsp is 4 input and 8 output.
Compare version B, verion E,F can boost more audio channel in Model 3, it can provide more power, and make the sound effect better than version B.
That is one of the reason why version E,F is much expensive than version B.
For some other luxury car, people would like to spend over 10,000 usd to change their DSP to make the audio system sounds great.