quad 33

I am running an authentic quad system 33, 303 and esl57s but looking to stream high res for convenience. I have read there is likely to be an issue with the line in levels of modern equipment for the 303. Before I shell out £500 for a streamer any advice? All input line level or not (😂) welcome.

I'm hoping someone here can help. Back in the 90s, my father used to run a small business called Academy Sound in Cornwall, which mainly focussed on converting the Quad 33 pre-amp so that it was compatible with CD players. Sadly, my Dad passed away in March and I have very little other than...