cone flap,help required

[E-Stat]

when the needle lands on the record the main drivers flap noticeably,or shake quite fst to put it another way.

First thing, turn down the gain!

they then do this while the record is playing.As a test,i turned the platter off and rested the needle on the record,and tapped the deck and also got cone flap.

You're watching the cone reproducing subsonic noise. As suggested earlier, you have an isolation problem or a resonance issue arising from a bad cartridge to arm mass match.

While glass racks are pretty, they are poor sound isolators. Is the deck sitting on a glass shelf? You may want to research the cartridge arm compatibility issue as well.

rw