the Genesis is made by Concertone, which has had a roller coaster reputation with FR customers.
they make two different sizes of entertainment units.
if you have the shorter, more square unit(Group B), a Jensen unit will usually fit perfectly.]
if it's the taller, narrower unit(Group A), Concertone is the only major manufacturer of that shape.
you'd have to do some woodworking to put a Jensen unit in its place.
you may want to look at the speakers first, before chucking the Genesis unit. the speakers are the weakest part of the system, generally.
if you do get rid of it, send me a PM. i may want to buy it from you.
and Zoe the Wonder Dog(R.I.P.)
'07 Roo 23SS pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC