Heat and interference

Is it okay to stack my BP-26 pre-amp directly on top of the MPS-2 power supply? Will the power supply generate too much heat or will there be any sort of electrical interference from this arrangement? Can I safely stack anything on the BP-26 or are there heat issues? The BP-26 seems to get warm (with nothing on it), but not hot.

TIA

I have my BP26 stacked on the MPS-2 and all seems fine. They are pictured stacked this way on the Bryston web site so I would assume it is OK.

Greg