Zoom H4N Limiter Settings?

Just been playing around with the three different LIMITER settings on the ZOOM H4N. The manual doesn't give any information as to what level the limiter actually kicks in at, so I decided to quickly test the three. It appears that on "LIMIT 1" it kicks in at around -9dBFS, "LIMIT 2" at around -6dBFS and "LIMIT 3" at around -3dBFS. I think to try and keep recordings as transparent as possible, I will therefore use LIMIT 3 from now on. Recording at 24 bits, it is not necessary to get as close to 0dBFS as possible, so as long as sufficient headroom is left, the limiter at this level should very rarely kick in; only when the signal is getting very close to 0dBFS....