The SoundUp device addresses that problem, by converting vintage speakers to Bluetooth. The idea is that the gadget will allow buyers to utilize premium-quality classic wooden-bodied passive speakers – which can be picked up for just a few bucks second-hand – as opposed to cheaply made plastic modern speakers that come with built-in Bluetooth. It should be safe for most 3- to 8-ohm vintage hi-fi or bookshelf passive speakers. If two of the devices are plugged into two separate speakers, however, they will automatically pair with one another and play back through both speakers in stereo. SoundUp - Revives old speakersSource: KickstarterNote: New Atlas may earn commission from purchases made via links.