IDawg1013According to the manufacturer's website, these have both S/PDIF and RCA: http://www.thonet-vander.com/us/product/kugel/. No back panel photos there unfortunately, but some searching around indicates to me that there's 2 RCA inputs and no S/PDIF.
On the Thonet & Vander Website it says that the Kugel has Blutooth, RCA Stereo inputs, and S/PDIF (Optical).
The Webpage for the Speaker -
http://www.thonet-vander.com/us/product/kugel/
Hope that Helps.
- Image Added showing the Back Panel and Side panel (optical and rca are visible)
pydsignerThere seems to be a 3.5mm > RCA cable included, as well as a spdif cable, so I would assume those inputs are present. Of course it would be so much easier to know if we just got a picture of the back.