You’d not be the first to wish for this.
Lot of threads in the previous Beoworld versions.
As an example see here:
https://archivedforum.beoworld.org/forums/p/42470/352106.aspx
If you stay ‘stubborn’ long enough, you might find the solution 🙂
However, the easiest way – as already suggested – is to use the 1611 converter.
By the way….the Powerlink port (that you call DIN connection) is for connecting to a Beolink Wireless 1 in order to make the BL3500 a wireless link speaker.
MM