Michael: Thank you for your response, certainly accurate - however, I must not have posed the question very well. Let me try again.
If pairing to a smart phone, easy enough - launch AR12 Bluetooth, go to phone, find AR12 and hit pair.
With this transmitter: when I'm pairing to a "Bluetooth speaker" I power off the transmitter, power off the transmitter, press and hold the power button on "Bluetooth Speaker" for 8-seconds (which powers it up and then puts it into pairing mode); then I press and hold the power button on transmitter for 8-Seconds (again putting it into pairing mode) and within a few seconds the devices are talking and paired up. Basically I'm trying to replace the "Bluetooth Speaker" with the AR-12, however the AR-12 doesn't seem capable of finding the transmitter (absent specifically selecting the AR-12 as you would with a smartphone).
**I've got many "Bluetooth" devices that I'm able to connect as indicated above, from many manufactures (i.e JBL Bluetooth Headphones, Portable Bluetooth Speakers, Cell Phones etc....) The AR-12 is the only thing I can't pair, but I'm guessing that it is "ME" and not the PreSonus.