Holmejr, thanks for the clarification. (I could have Googled it myself instead of asking a silly question.)
Yes, the corner bracing on the plinth of the later LP12s is better, but that doesn't mean you should not get a Cirkus and a Lingo for your present table IMHO. The contribution of the plinth changes to the sound of the TT is minimal as long as you have your LP12 on a decent support. And hey, I'm a fixer-upper.
If your sound is dull now, you might check your VTA if you haven't done that recently. "Dull" could mean it's too low.
Yes, the corner bracing on the plinth of the later LP12s is better, but that doesn't mean you should not get a Cirkus and a Lingo for your present table IMHO. The contribution of the plinth changes to the sound of the TT is minimal as long as you have your LP12 on a decent support. And hey, I'm a fixer-upper.
If your sound is dull now, you might check your VTA if you haven't done that recently. "Dull" could mean it's too low.