I also have a B1 that I like. It has very good reception. I almost never have dropouts, delays, or signal problems from my iPad.
I use the Toslink optical output to a Marantz SACD-30n. This way I use the internal Marantz DAC, not the Audioengine DAC chip for digital to analogue conversion.
I don’t leave anything powered on all the time. My B1 shuts itself off after a few minutes if there is no incoming Bluetooth signal (blinking white light).
Not sure I answered your second question.