What can be done with a Phillips Roku TV that puts out poor sound that you can barely hear and there are no speaker systems that will work with it? I contacted the store where I bought it; they won't take it back. Are you going to provide a fix or should I just throw it out and buy something that works?
Have you tried contacting Phillips support yet to inquire further? I'd suggest starting there to see what options or suggestions they can provide. Each Roku TV manufacturer provides direct support for their products running the Roku OS.