Simplest / cheapest way to add source to JBL 305P

[Not dave]

I am looking to get a lair of 305p’s for desktop listening. What is the cheapest way I can send an audio signal to them, source can be iPhone, iPod or Qudelix 5k. Down the road I’ll probably get a ‘proper’ streamer such as a wiim or raspberry pi.

 

[somebodyelse]

A cable like this:
https://cabletimetech.com/en-gb/products/3-5mm-trs-to-dual-6-35mm-1-4-ts-mono-y-splitter-audio-cable
Plus an Apple headphone dongle for the iPhone if you're not using it with the 5k.