sssibilancccce...

One other factor to check is the tracking force. Many folks set this on the light side assuming that this will cause the least record/stylus wear -- actually, the opposite is true. Be sure your tracking force is set at least at the mid-point of the allowed range or higher. Both sibilance and noise should improve.
Best of luck,
Joe

Plato and Joe are right. Check VTA, your antiscating and the tracking force. Be patient. It can be done. Cheers,

Since it only occurs on some records and not others, it may be wear from mistracking. All of the above are correct in pointing to VTA, antiskating and tracking. Too much or too little (lithp) sibilance is the easiest gauge of VTA and tracking force. As implied above, best to set near the max for tracking and anti-skate. W/re VTA, lower the back of the arm to decrease, raise it to increase. Mislalignment would lead to such serious record wear problems I doubt you'd be asking about sibilance.

Sibilance is easy to understand and fix w/re lps. I was hoping when I saw this thread that you wanted to talk about too much sibilance or lispiness on cds. Much more interesting and intractable problem.

jfacker: i agree with all above posts but the first. if i may sum things up: it ain't likely the lp's you're buyin' that are causin' the ssssssss......... -cfb