Why isn't what you've got working? If it's got an output to some RCA jacks that should be all you need.
The Wiim stuff is hard to beat though. I have a mini into an old NAD amp and the only thing I miss is being able to group it on Google home (all the more expensive Wiim stuff would do that).
Hi there. I'd like a little advice if you have a moment, audiophiles. I want to stream via bluetooth or wifi, my iphone or Macbook Pro through my old but excellent Cambridge Audio p70 amp. I've got some Tannoy R1s and a Goldring Lenco turntable and this and the cd player sound great. But, I've tried to use a cheap Logitech Blutooth DAC but can't make it work with the amp. My question is what do I need to be able to connect and stream to this amp via Bluetooth or Wifi - would something like this work? https://www.richersounds.com/wiim-pro-plus-black.html or this https://soundnews.net/sources/dacs/topping-e30-dac-review-entry-level-overachiever/ or this https://www.richersounds.com/tangent-dac-ii-black.html