Open baffle design advice for Lii Audio F-15

[jack_]

Hi,

I am looking at building some open baffle speakers with the Lii audio F-15s and am trying to decide on baffle dimensions. I will be listening quite nearfield and am limited on space between the sidewalls, although have plenty above and behind me. so I was thinking of a baffle size of 70x75x4cm. Ideally this would be smaller, something like 60x65x4cm.

Would there be an appreciable difference in bass response between these two baffle sizes?
Also, is it an issue to mount the drivers centred and the baffle is almost square. Is this of any detriment, is it better that they are off centre? Would that make an appreciable difference nearfield?

I plan to add a sub later on, and don't need thunderous bass. In this setup I'll mainly be listening to jazz, soul etc.

Thanks in advance for your help.
Quick mockup attached of the two sizes for comparison

 

[Vermouth]

Subscribed, can't comment much on the OB.

I have a RiPole subwoofer in the works with the SB Audience 12OB drivers which are meant to be a good match for OB and electrostatics.

 

[jack_]

I've reposted this in the full range driver forum where it seems more appropriate, sot his can be deleted (I can't see how to)

 

[Mooly]

New thread is here:
https://www.diyaudio.com/community/threads/open-baffle-design-help.391996/