[what differ between SPL-120 and R-112SW?]

When will launch the new RP subwoofers seen in this video?

 

 

[RP-8000F vs Rp-280F]

Hello.

 

I read that 8000F has an open backed tweeter/horn and the 280F has an closed backed tweeter/horn.

 

What is the difference in sound compared to opened or closed?

In this video, the listener prefered the 280F sound.

 

https://www.youtube.com/watch?v=rzxEpNjxoYo&t