You can enable optical mode, but you'll need a preamplifier with variable optical output and an optical splitter too, so I believe it's better to sell one speaker and find another one matching the one you'll keep. The app won't work in optical mode either.
Living room: Kii Three/BXT with Control.
Den: Tannoy Precision 8 iDP with TS112 iDP subwoofer.
In the cupboard, waiting for a sibling: 1st gen. Phantom Silver running DOS1
My Phantom Voyage
Den: Tannoy Precision 8 iDP with TS112 iDP subwoofer.
In the cupboard, waiting for a sibling: 1st gen. Phantom Silver running DOS1
My Phantom Voyage