Placing Digital Sources under Turntable OK?

I asked this in my turntable thread but never got an answer so I'm hoping a thread will work.

I have to reorient my rack to accommodate my new turntable.  The turntable is on 2 1/2" thick maple block bae which is being held up from the shelf below it by 4 isolation pods.

There is room beneath the turntable base to place my digital sources as they are quite thin - it's a Benchmark DAC being fed by a small palm-sized Raspberry Pi computer. 

Is there anything wrong with placing the digital sources below the turntable base?  Is there any reason in terms of possible emissions from the DAC or computer that could be picked up by the turntable (cartridge or whatever)?

Thanks.