Toriaz sp-16 is there a way to connect to djm900nxs2 send /return

I apologize for the late response.

Of course you can do this on SP-16

Refer to this document, but instead of using an external effect processor, use SP-16 and make sure your SP-16 is monitoring the audio coming in from DJM900-NXS2

https://faq.pioneerdj.com/files/img/DJM-900NXS2_No26_E.pdf 

Does that answer your question?

Thanks