Slowing the Benq 1620 down?

I know the idea usually is faster the better as long as the quality remains, however I was wondering if it was possible to slow the drive down on certain media. I have some RitekG04 media and its only supported at 4x. However I would like to burn these discs at 2x or 1x if possible. Comparing a disc written at 4x to a disc written with my LiteOn-SOSW852S at 2x you can see there is a huge difference. The burn mark is definitely more defined from the liteon drive. Any ideas thanks!!!

Ritek G04, as well as most other 4X media are supported only at 4X. You can not slow them down to 2X. Give it a try at 4X and see what happens.