Components on floor

I’m thinking of about a Dimplex IgniteXL 60" fireplace unit that’s either on or off.  Instead of mounting it to the wall, the carpenters will build a cabinet to hold the unit at the top with a shelf at the bottom for audio gear.  The cabinet will abut the wall behind with slots for ventilation.  The floor is hardwood over concrete.  The walls are furred-out studs and wall board over concrete.  The gear is an Ayre DX-5/20 disc player, QX-5/20 DAC/preamp, AX-5/20 integrated amp, and Roon Nucleus.  I gave my Thorens TD124 and vinyl to my cousin.

I’m 89 but can comfortably bend to insert a disc.  Mostly I stream music or watch YouTube/Netflix on the 85" Sony. 

Don't put them on the floor. Use amp stands.

I’d say lord in heaven no if not a concrete floor.  Even so elevating a bit makes use easier.  If foundation level and any chance of flooding,  definitely no. Distance from any nearby electric devices always desirable just in case. 

OP

just isolate the hard wood from the concreate floor. It should work

Get some butcher block boards that fit under each component, under the blocks put your favorite footer.