rockford fosgate speaker help needed!?

[fgb786]

are rockford fosgate speakers any good. my friend gave me two rockford fosgate speakers for my car since my stock ones ripped. are the speakers good as in do they have decent bass n all or shud i buy completly new ones. i m planning to havea sub installed later. the speakers he gave me are rockford fosgate punch rfp-1406. i currently have two pioneer 4x6 speaker installed in the front with barely any bass and was planning on installing these in the rear . shud i go ahead and then install a sub. are these speaker by themselves anygood in terms of sound and bass?