horn or line array?

at least $10k minimum to get speaker wigh plasma tweeter  ,   is that correct??

Unless you can get used Vaugn plasma speaker, it will be 15k$ and up.

After being happy with Scaena 3.2, I had considered letting my Lansche 4.1 go.

But I found that Lansche is still better for female vocal music while Scaena give slightly wider soundstage.

You dont need to insist on speaker with plasma tweeter.

My Vaughn Cabernett II with ribbon tweeter and accuton ceramic midrange driver give also decent female voice although it falls  short of Lansche little bit.

cheapest speaker with ribbon tweeter ?

Go for plasma tweeter if you can afford.

But Altec A7 wihout passive network give nice female vocal.

Likewise, Scaena without passive network give very good female voice too.

Midrange driver of Lansche is connected without passive network like full range driver.

I hate passive network which reduces details.