Two...
Bose Sounklink Mini 1 (bought in 2013)
Bose Sound Base (bought 2016)
And no, I am not a Bose fanboy.
But the Sounklink Mini ranks consistently in the top BT speakers every year and the soundbase I got for really cheap. (Actually, if I could do it again, I'd get the Polk or Yamaha soundbar instead [knowing a little more now ].)