The actual audio-extraction test:
The test was performed with an audio CD from 755.51MB (1h14m51s) and inhabits 17 tracks.
The CD is called Solid Sounds format 11 CD1.
The Secure Test with EAC.
The same CD in the in the burst mode
In the secure mode the Plextor manages to get an average speed of 8.9 according to factor X.
This is the average optimal reading speed during audio extraction.
In the burst mode we got 19.6x out of this Plextor.