they spec the +14dB with limiter *on* , in both F4 and F8. i wonder if thats the difference?
manual says "The F uses a newly-designed limiter. This limiter has 10dB of
headroom, preventing distortion and allowing it to keep signals
below the set threshold even more than ordinary limiters."
that 10 dB cant merely be a coincidence....
i might try to feed the F6 a +14dB signal with a limiter and see if it takes it in both 24 and 32-bit mode
F8n also specifies +14dB input,but looking at the F8n manual, the limiter is more similar to the F6 (menu is identical), vs the F4, which doesnt have the "advanced" mode