Not crappy-ish, just plain crappy. Especially if you put a sub in there! Get yourself a pair of stands (adjustable, designed for surround speakers would be best) and straddle the armoire with them. Put the sub on the floor, next to the armoire, with the face of the sub slightly forward of the front. If it's rear-ported, put a few inches between the sub and the side.
No point in upgrading, if that is what you are going to do with them! Sound quality is all about location, location, location.
It's a VIRTUAL channel unless stated otherwise.