I see this questioned asked a lot on the FB 389 page. Nobody ever had an answer. Is there any audio shops that specialize in big rig stereo? I do have the trash smart nav so I know that's a problem. But I know some of yall have nice stereos. I'd like to add a couple subs and I have 1 blown speaker. I'm from Tennessee and typically stay in the south and midwest. But I suppose I could make a special trip to get a system put in.