JBL makes some of the best Bluetooth speakers around, but one of its best features isn't that well known. There are a couple of good reasons for that: PartyBoost only launched a few years ago, replacing a very similar feature; and you need more than one compatible speaker in order to use PartyBoost.
JBL hasn't helped itself here. It's changed its wireless pairing technology every few years, leading to much confusion and a lot of compatibility issues. You would think if you had bought speakers exclusively from JBL for the last decade they would all work together, but you would be wrong.
