It seems like more and more speakers are available with wireless connectivity, but many older devices are still wired. The good news is that there are several ways to turn wired speakers into wireless speakers, from Bluetooth receivers to wireless conversion kits.

Send music wirelessly to your wired speakers using Bluetooth adapters in combination with an amplifier.

Using an audio cable, connect a Chromecast for Audio or Echo Dot, Echo Input, Echo Link, and Echo Plus to an amplifier, stereo, or home theater receiver that may not be equipped with internet streaming capabilities. The Echo Link Amp can also be connected directly to wired speakers.

This allows you to listen to music streamed to Google Chromecast for Audio wirelessly via your smartphone or Google Home, through wired speakers connected to an amplifier.