Sonos doesn't make computer speakers. However, there are ways of turning your current Sonos into computers speakers. Here's ...

If you have a set of non-amplified speakers, you can hard-wire them to a Sonos Amp, which has a built-in amplifier that’s powerful enough for up to two pairs of small or large speakers.

These aren't wireless, alas, but they're designed to work seamlessly with the Sonos Amp, which knows exactly ... that the Sonos streaming box could end up falling into a valley between the two ...