A:AnswerHi Krazed, Yes, both speakers feature the Wireless Party Chain function. You may refer to pages 46-48 of this link for more information:
https://docs.sony.com/release//Help_4735513113.pdf
~Ralph
A:AnswerThat's not really the question I was asking, I was wondering if you could wire up another separate sub or speaker to add bass, the current bass is not sufficient, the extra bass option hardly gives a boost even combined with a custom eq.