Anyone experimenting with speakers on their pro-106/197 can mark the motorola ssn-4005a as a winner! I had one of these in my vast piles of gadgets and decided to try it. This thing has great tone quality and volume.
I too use only motorola speakers on my PRO 106 & PRO 197....On my 106 I did mod at the speaker jack ...a wire from the antenna to the jack...works great!!! don't have to use the mod on the 197...you can not go wrong with Motorola....looking to ge a amplified moto speaker soon..... I use moto for all my ham gear too...