VY Calais factory head unit & subs

[CARUNA]

hey guys i have a VY Calais and i was just wondering if i can put a sub and an amp in it with out changing the head unite. coz i have had people say because i have the factory head unite on it at the moment at dont want to change it i can not put subs in it?

this is this try?

[rch-13z]

Blaupunkt low-level outputs? You betcha! :D