Conclusion

After the test results, its clear than YAMAHA's AudioMASTER Pro technology does work reducing the 3T Pit&Land Jitter compared with the 4X writing speed. YAMAHA promises 30% less Jitter that wasn't confirmed from the test results, at least with the RITEK JS type media. The biggest improvement comes at the 3T Land Jitter with a 14% improvement:

• 3T Pit Gain: 4.38%
• 3T Land Gain: 14.04%

TEAC's CD-W540E "4X Boost" function worked well and reduced Jitter up to 8%!

• 3T Pit Gain: 3.92%
• 3T Land Gain: 8.03%

Plextor's VariREC +0 function produced worst results than the normal 4X writing speed which is at least strange…

• 3T Pit Gain: -1.90%
• 3T Land Gain: -4.63%

The AudioMASTER and TEAC's "4X Boost" technologies produced good results as each manufacturer was promised. Both technologies will reduce Jitter (especially the 3T Land values). The CRW-F1E under AudioMASTER will write less data (68mins with 80min CDs), than the other two technologies which is a drawback.

Of course even at the 4X normal writing mode, the CRW-F1E is still better than both CD-W540E and PX-W4824A. Using a 90min disc will allow writing up to 74mins that solves the problem, partially. The 1X writing speed mode didn't tested since 1X writing can be considered as very slow.

Future tests will revile if the used media affects the performance of each Jitter reduction technology...

Below are the results from all modes: