Does it have to be new? I do believe my SR4722's from JBL are 600 watt. Bi-ampable too. You might be able to pick up a decent used pair. They're a 12" + (roughly) 1" horn.
The input panel shall incorporate two switches allowing external
configuration between biamped or passive operation. Input
connections shall be accommodated with two paralleled NL4
female Speakon® connectors.