That's what the curve I have with my 1213s(or 1213@1653)! And this is one of the reason to switch to a new drive
I found some interesting point
If I burn the disc by my 1213s, scan with 1213s -> spikes
If I burn the disc by my 1213s, scan with my 24102B(CDRW) ->no spikes
If I burn the disc by my 24102B, scan with 1213s ->no spikes
If I burn the disc by my 24102B, scan with my 24102B->no spikes
I guess, the spikes may come from high speed scan? Bad jitter? or Liteon RW Drive is just a bad CD Scanner?
Also, the review from CDRLabs gives no C2 at all (scan at 32x by 52246S)
Should I get 1693s or a LG4163 or BenQ 1620 if I want to burn both good CDR and DVD+R (mainly)?