I have Costco hearing aids version 4. Before I bought these about 3 years ago, I went to Beltone for an exam. He demoed their hearing aids and it helped with the clarity of my wife’s speech. Now that I have the Kirkland aids, I am not completely satisfied with them. I just don’t think that the Costco examiner did a good enough job. I have an appointment with a local audiologist next month, and will see what he can do for me. In general, I don’t need louder sound, just more clarity.