multiple kv boxes

Hi guys, already have kv a780lan installed and working ok.
Question is can i fit another kv box in my bedroom connected to existing splitter. If i can will i lose any quality and will it interfere with my existing kv box.
I have a 4 splitter connected to vm b/band, vm box, kv box with one spare.
Thanks

the more you split the signal the more loss you get,someone said to run it off the other port on first box

should be ok ,ive run similar, before you plug in no 2 k/v press info on k/v 1 and check signal and quality, after you install 2nd box will see theres not a lot of difference as long as the conections are ok